./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:20:53,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:20:53,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:20:53,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:20:53,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:20:53,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:20:53,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:20:53,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:20:53,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:20:53,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:20:53,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:20:53,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:20:53,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:20:53,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:20:53,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:20:53,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:20:53,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:20:53,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:20:53,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:20:53,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:20:53,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:20:53,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:20:53,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:20:53,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:20:53,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:20:53,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:20:53,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:20:53,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:20:53,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:20:53,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:20:53,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:20:53,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:20:53,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:20:53,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:20:53,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:20:53,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:20:53,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:20:53,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:20:53,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:20:53,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:20:53,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:20:53,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:20:53,589 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:20:53,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:20:53,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:20:53,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:20:53,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:20:53,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:20:53,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:20:53,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:20:53,592 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:20:53,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:20:53,593 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:20:53,594 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:20:53,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:20:53,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:20:53,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:20:53,594 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:20:53,594 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:20:53,595 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:20:53,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:20:53,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:20:53,595 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:20:53,595 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:20:53,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:20:53,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:20:53,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:20:53,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:20:53,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:20:53,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:20:53,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:20:53,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:20:53,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:20:53,597 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:20:53,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:20:53,598 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:20:53,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:20:53,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:20:53,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:20:53,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:20:53,918 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:20:53,918 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:20:53,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-31 22:20:55,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:20:55,297 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:20:55,300 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2023-08-31 22:20:55,321 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a426c82/8975563e65f0469eb0f40dcc12b06a5f/FLAG8d39aab80 [2023-08-31 22:20:55,340 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a426c82/8975563e65f0469eb0f40dcc12b06a5f [2023-08-31 22:20:55,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:20:55,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:20:55,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:20:55,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:20:55,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:20:55,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:20:55" (1/1) ... [2023-08-31 22:20:55,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3346096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:55, skipping insertion in model container [2023-08-31 22:20:55,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:20:55" (1/1) ... [2023-08-31 22:20:55,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:20:55,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:20:55,834 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2023-08-31 22:20:55,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:20:55,877 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:20:55,917 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2023-08-31 22:20:55,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:20:56,013 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:20:56,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56 WrapperNode [2023-08-31 22:20:56,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:20:56,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:20:56,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:20:56,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:20:56,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,062 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 149 [2023-08-31 22:20:56,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:20:56,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:20:56,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:20:56,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:20:56,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:20:56,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:20:56,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:20:56,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:20:56,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (1/1) ... [2023-08-31 22:20:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:20:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:20:56,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:20:56,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:20:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:20:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:20:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:20:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:20:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:20:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:20:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:20:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:20:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:20:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:20:56,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:20:56,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:20:56,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:20:56,203 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:20:56,382 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:20:56,383 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:20:56,621 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:20:56,630 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:20:56,630 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:20:56,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:56 BoogieIcfgContainer [2023-08-31 22:20:56,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:20:56,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:20:56,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:20:56,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:20:56,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:20:55" (1/3) ... [2023-08-31 22:20:56,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a75e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:20:56, skipping insertion in model container [2023-08-31 22:20:56,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:20:56" (2/3) ... [2023-08-31 22:20:56,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a75e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:20:56, skipping insertion in model container [2023-08-31 22:20:56,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:20:56" (3/3) ... [2023-08-31 22:20:56,639 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2023-08-31 22:20:56,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:20:56,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 22:20:56,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:20:56,801 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:20:56,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 350 flow [2023-08-31 22:20:56,942 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-31 22:20:56,942 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:20:56,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 10/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 412 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-31 22:20:56,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 167 transitions, 350 flow [2023-08-31 22:20:56,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 161 transitions, 334 flow [2023-08-31 22:20:56,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:20:56,975 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-31 22:20:56,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 161 transitions, 334 flow [2023-08-31 22:20:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 161 transitions, 334 flow [2023-08-31 22:20:57,041 INFO L130 PetriNetUnfolder]: 10/161 cut-off events. [2023-08-31 22:20:57,041 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:20:57,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 10/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 119. Up to 3 conditions per place. [2023-08-31 22:20:57,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792 [2023-08-31 22:21:01,319 INFO L134 LiptonReduction]: Checked pairs total: 12544 [2023-08-31 22:21:01,319 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-31 22:21:01,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:21:01,335 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;@26bd7793, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:21:01,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-31 22:21:01,337 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:21:01,337 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:21:01,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:01,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:21:01,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:01,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:01,342 INFO L85 PathProgramCache]: Analyzing trace with hash 680, now seen corresponding path program 1 times [2023-08-31 22:21:01,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:01,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228083459] [2023-08-31 22:21:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:01,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228083459] [2023-08-31 22:21:01,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228083459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:01,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:01,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:21:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468249934] [2023-08-31 22:21:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:21:01,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:21:01,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:21:01,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 327 [2023-08-31 22:21:01,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:01,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:01,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 327 [2023-08-31 22:21:01,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:01,761 INFO L130 PetriNetUnfolder]: 1250/1969 cut-off events. [2023-08-31 22:21:01,762 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 22:21:01,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1969 events. 1250/1969 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9149 event pairs, 994 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 3680. Up to 1922 conditions per place. [2023-08-31 22:21:01,773 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 42 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-31 22:21:01,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 184 flow [2023-08-31 22:21:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:21:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:21:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-08-31 22:21:01,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443425076452599 [2023-08-31 22:21:01,786 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-08-31 22:21:01,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-08-31 22:21:01,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:01,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-08-31 22:21:01,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:01,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:01,797 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:01,798 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 356 transitions. [2023-08-31 22:21:01,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 184 flow [2023-08-31 22:21:01,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:01,803 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-31 22:21:01,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-31 22:21:01,807 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-31 22:21:01,807 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-31 22:21:01,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:01,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:01,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:21:01,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:21:01,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:01,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash 671187, now seen corresponding path program 1 times [2023-08-31 22:21:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:01,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790181980] [2023-08-31 22:21:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790181980] [2023-08-31 22:21:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790181980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:02,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805917065] [2023-08-31 22:21:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:02,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-31 22:21:02,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:02,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-31 22:21:02,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:02,256 INFO L130 PetriNetUnfolder]: 1223/1917 cut-off events. [2023-08-31 22:21:02,257 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:02,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 1917 events. 1223/1917 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8798 event pairs, 972 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 3799. Up to 1869 conditions per place. [2023-08-31 22:21:02,266 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-31 22:21:02,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 168 flow [2023-08-31 22:21:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-31 22:21:02,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-31 22:21:02,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-31 22:21:02,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-31 22:21:02,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:02,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-31 22:21:02,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,279 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 495 transitions. [2023-08-31 22:21:02,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 168 flow [2023-08-31 22:21:02,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:21:02,281 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2023-08-31 22:21:02,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-31 22:21:02,282 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-31 22:21:02,282 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2023-08-31 22:21:02,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:02,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:21:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:21:02,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:02,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash 671188, now seen corresponding path program 1 times [2023-08-31 22:21:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446120480] [2023-08-31 22:21:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:02,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:02,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446120480] [2023-08-31 22:21:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446120480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:02,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:21:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939789845] [2023-08-31 22:21:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:02,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-31 22:21:02,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:02,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-31 22:21:02,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:02,552 INFO L130 PetriNetUnfolder]: 1196/1865 cut-off events. [2023-08-31 22:21:02,552 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:02,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 1865 events. 1196/1865 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8455 event pairs, 950 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3698. Up to 1818 conditions per place. [2023-08-31 22:21:02,561 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-31 22:21:02,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 164 flow [2023-08-31 22:21:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-31 22:21:02,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-31 22:21:02,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-31 22:21:02,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-31 22:21:02,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:02,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-31 22:21:02,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,568 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 481 transitions. [2023-08-31 22:21:02,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 164 flow [2023-08-31 22:21:02,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:02,570 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-31 22:21:02,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-31 22:21:02,571 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-31 22:21:02,571 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-31 22:21:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:02,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:21:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:21:02,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:02,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 645028316, now seen corresponding path program 1 times [2023-08-31 22:21:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:02,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637879041] [2023-08-31 22:21:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:02,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:02,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637879041] [2023-08-31 22:21:02,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637879041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:02,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:02,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:02,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450902352] [2023-08-31 22:21:02,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:02,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:21:02,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:21:02,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:21:02,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-31 22:21:02,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:02,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-31 22:21:02,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:02,870 INFO L130 PetriNetUnfolder]: 875/1390 cut-off events. [2023-08-31 22:21:02,870 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:02,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 1390 events. 875/1390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6042 event pairs, 688 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 2759. Up to 1354 conditions per place. [2023-08-31 22:21:02,876 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 35 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-31 22:21:02,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 160 flow [2023-08-31 22:21:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-31 22:21:02,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943934760448522 [2023-08-31 22:21:02,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-31 22:21:02,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-31 22:21:02,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:02,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-31 22:21:02,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,885 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 485 transitions. [2023-08-31 22:21:02,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 160 flow [2023-08-31 22:21:02,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:02,887 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-31 22:21:02,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-31 22:21:02,887 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-31 22:21:02,888 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-31 22:21:02,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:02,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:02,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:21:02,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:21:02,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:02,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash 645028315, now seen corresponding path program 1 times [2023-08-31 22:21:02,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:02,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254417447] [2023-08-31 22:21:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:02,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:02,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254417447] [2023-08-31 22:21:02,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254417447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:02,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:02,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914420082] [2023-08-31 22:21:02,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:21:02,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:02,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:21:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:21:02,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 327 [2023-08-31 22:21:03,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:03,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 327 [2023-08-31 22:21:03,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:03,089 INFO L130 PetriNetUnfolder]: 554/915 cut-off events. [2023-08-31 22:21:03,089 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 915 events. 554/915 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3804 event pairs, 426 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1820. Up to 890 conditions per place. [2023-08-31 22:21:03,093 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-31 22:21:03,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 156 flow [2023-08-31 22:21:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-31 22:21:03,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750254841997961 [2023-08-31 22:21:03,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-31 22:21:03,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-31 22:21:03,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:03,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-31 22:21:03,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,099 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 466 transitions. [2023-08-31 22:21:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 156 flow [2023-08-31 22:21:03,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:03,100 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2023-08-31 22:21:03,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-31 22:21:03,101 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-08-31 22:21:03,101 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2023-08-31 22:21:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:03,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:03,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:21:03,103 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:03,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137457, now seen corresponding path program 1 times [2023-08-31 22:21:03,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:03,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121937907] [2023-08-31 22:21:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:03,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:03,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121937907] [2023-08-31 22:21:03,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121937907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:03,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:03,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:03,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301298864] [2023-08-31 22:21:03,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:03,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:21:03,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:21:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:21:03,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-08-31 22:21:03,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:03,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-08-31 22:21:03,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:03,511 INFO L130 PetriNetUnfolder]: 630/1056 cut-off events. [2023-08-31 22:21:03,511 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 22:21:03,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1056 events. 630/1056 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4962 event pairs, 114 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 2094. Up to 669 conditions per place. [2023-08-31 22:21:03,515 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-31 22:21:03,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 326 flow [2023-08-31 22:21:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:21:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:21:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-31 22:21:03,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003058103975535 [2023-08-31 22:21:03,518 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-31 22:21:03,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-31 22:21:03,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:03,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-31 22:21:03,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,524 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,524 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 5 states and 818 transitions. [2023-08-31 22:21:03,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 326 flow [2023-08-31 22:21:03,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:03,526 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 96 flow [2023-08-31 22:21:03,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-31 22:21:03,527 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-08-31 22:21:03,527 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 96 flow [2023-08-31 22:21:03,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:03,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:21:03,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:21:03,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:03,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1479137456, now seen corresponding path program 1 times [2023-08-31 22:21:03,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:03,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698793680] [2023-08-31 22:21:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:03,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698793680] [2023-08-31 22:21:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698793680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:03,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164755100] [2023-08-31 22:21:03,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:03,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:21:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:21:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:21:03,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 327 [2023-08-31 22:21:03,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:03,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:03,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 327 [2023-08-31 22:21:03,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:04,127 INFO L130 PetriNetUnfolder]: 570/959 cut-off events. [2023-08-31 22:21:04,127 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-31 22:21:04,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 959 events. 570/959 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3672 event pairs, 195 based on Foata normal form. 16/775 useless extension candidates. Maximal degree in co-relation 2014. Up to 754 conditions per place. [2023-08-31 22:21:04,132 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 62 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-31 22:21:04,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 293 flow [2023-08-31 22:21:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:21:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:21:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-31 22:21:04,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929663608562691 [2023-08-31 22:21:04,134 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-31 22:21:04,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-31 22:21:04,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:04,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-31 22:21:04,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,139 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 5 states and 806 transitions. [2023-08-31 22:21:04,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 293 flow [2023-08-31 22:21:04,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:04,142 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 122 flow [2023-08-31 22:21:04,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-31 22:21:04,142 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-31 22:21:04,142 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 122 flow [2023-08-31 22:21:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:04,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:21:04,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:04,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -161798454, now seen corresponding path program 1 times [2023-08-31 22:21:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:04,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698651314] [2023-08-31 22:21:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:04,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698651314] [2023-08-31 22:21:04,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698651314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:04,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:21:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093925358] [2023-08-31 22:21:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:04,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 22:21:04,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:04,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 22:21:04,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:04,304 INFO L130 PetriNetUnfolder]: 615/1052 cut-off events. [2023-08-31 22:21:04,304 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-31 22:21:04,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1052 events. 615/1052 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4589 event pairs, 276 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2380. Up to 922 conditions per place. [2023-08-31 22:21:04,310 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-31 22:21:04,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 283 flow [2023-08-31 22:21:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-31 22:21:04,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208970438328236 [2023-08-31 22:21:04,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-31 22:21:04,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-31 22:21:04,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:04,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-31 22:21:04,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,316 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 122 flow. Second operand 3 states and 511 transitions. [2023-08-31 22:21:04,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 283 flow [2023-08-31 22:21:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:04,318 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 133 flow [2023-08-31 22:21:04,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-31 22:21:04,319 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-08-31 22:21:04,319 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 133 flow [2023-08-31 22:21:04,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:04,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:04,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:21:04,320 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:04,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1200004358, now seen corresponding path program 1 times [2023-08-31 22:21:04,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:04,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942003875] [2023-08-31 22:21:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:04,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942003875] [2023-08-31 22:21:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942003875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:04,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:04,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223815685] [2023-08-31 22:21:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:04,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 22:21:04,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:04,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 22:21:04,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:04,485 INFO L130 PetriNetUnfolder]: 638/1077 cut-off events. [2023-08-31 22:21:04,486 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-31 22:21:04,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1077 events. 638/1077 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4691 event pairs, 219 based on Foata normal form. 10/899 useless extension candidates. Maximal degree in co-relation 2637. Up to 861 conditions per place. [2023-08-31 22:21:04,491 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 58 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-31 22:21:04,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 302 flow [2023-08-31 22:21:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-31 22:21:04,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-08-31 22:21:04,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-31 22:21:04,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-31 22:21:04,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:04,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-31 22:21:04,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,497 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 133 flow. Second operand 3 states and 516 transitions. [2023-08-31 22:21:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 302 flow [2023-08-31 22:21:04,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:04,500 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 141 flow [2023-08-31 22:21:04,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-31 22:21:04,501 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-31 22:21:04,501 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 141 flow [2023-08-31 22:21:04,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:04,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:04,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:21:04,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:04,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:04,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1183384702, now seen corresponding path program 1 times [2023-08-31 22:21:04,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:04,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162315193] [2023-08-31 22:21:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:04,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:04,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162315193] [2023-08-31 22:21:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162315193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37236657] [2023-08-31 22:21:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:04,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:04,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:21:04,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:21:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 22:21:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:05,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-31 22:21:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:05,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37236657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:05,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:05,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-31 22:21:05,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379328045] [2023-08-31 22:21:05,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:21:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:21:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:21:06,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-31 22:21:06,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 141 flow. Second operand has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:06,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:06,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-31 22:21:06,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:07,767 INFO L130 PetriNetUnfolder]: 1709/2796 cut-off events. [2023-08-31 22:21:07,767 INFO L131 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2023-08-31 22:21:07,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 2796 events. 1709/2796 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 13219 event pairs, 169 based on Foata normal form. 66/2424 useless extension candidates. Maximal degree in co-relation 6980. Up to 1096 conditions per place. [2023-08-31 22:21:07,785 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 204 selfloop transitions, 22 changer transitions 0/226 dead transitions. [2023-08-31 22:21:07,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 226 transitions, 1075 flow [2023-08-31 22:21:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:21:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:21:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2166 transitions. [2023-08-31 22:21:07,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47313237221494103 [2023-08-31 22:21:07,791 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2166 transitions. [2023-08-31 22:21:07,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2166 transitions. [2023-08-31 22:21:07,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:07,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2166 transitions. [2023-08-31 22:21:07,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 154.71428571428572) internal successors, (2166), 14 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,804 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,805 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 141 flow. Second operand 14 states and 2166 transitions. [2023-08-31 22:21:07,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 226 transitions, 1075 flow [2023-08-31 22:21:07,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 226 transitions, 1072 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:07,810 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 308 flow [2023-08-31 22:21:07,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=308, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-31 22:21:07,811 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-31 22:21:07,811 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 308 flow [2023-08-31 22:21:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 139.85714285714286) internal successors, (2937), 21 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:07,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:07,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:07,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 22:21:08,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 22:21:08,020 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:08,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 705944842, now seen corresponding path program 1 times [2023-08-31 22:21:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:08,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687971259] [2023-08-31 22:21:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:08,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:08,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687971259] [2023-08-31 22:21:08,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687971259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:08,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:08,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:08,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325895825] [2023-08-31 22:21:08,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:08,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:08,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 327 [2023-08-31 22:21:08,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:08,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:08,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 327 [2023-08-31 22:21:08,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:08,266 INFO L130 PetriNetUnfolder]: 487/940 cut-off events. [2023-08-31 22:21:08,266 INFO L131 PetriNetUnfolder]: For 896/896 co-relation queries the response was YES. [2023-08-31 22:21:08,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 940 events. 487/940 cut-off events. For 896/896 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4019 event pairs, 73 based on Foata normal form. 42/912 useless extension candidates. Maximal degree in co-relation 2665. Up to 682 conditions per place. [2023-08-31 22:21:08,279 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 48 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-31 22:21:08,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 406 flow [2023-08-31 22:21:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-31 22:21:08,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-31 22:21:08,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-31 22:21:08,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-31 22:21:08,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:08,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-31 22:21:08,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:08,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:08,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:08,286 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 308 flow. Second operand 3 states and 496 transitions. [2023-08-31 22:21:08,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 406 flow [2023-08-31 22:21:08,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 374 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:08,294 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 254 flow [2023-08-31 22:21:08,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-31 22:21:08,295 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-31 22:21:08,295 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 254 flow [2023-08-31 22:21:08,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:08,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:08,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:21:08,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:08,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash -190660559, now seen corresponding path program 1 times [2023-08-31 22:21:08,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:08,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389769527] [2023-08-31 22:21:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389769527] [2023-08-31 22:21:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389769527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:08,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:21:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880088706] [2023-08-31 22:21:08,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:08,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:21:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:21:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:21:09,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 327 [2023-08-31 22:21:09,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:09,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:09,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 327 [2023-08-31 22:21:09,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:10,031 INFO L130 PetriNetUnfolder]: 695/1286 cut-off events. [2023-08-31 22:21:10,031 INFO L131 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2023-08-31 22:21:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 1286 events. 695/1286 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5603 event pairs, 103 based on Foata normal form. 12/1272 useless extension candidates. Maximal degree in co-relation 3576. Up to 672 conditions per place. [2023-08-31 22:21:10,038 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 138 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2023-08-31 22:21:10,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 894 flow [2023-08-31 22:21:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:21:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:21:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1842 transitions. [2023-08-31 22:21:10,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43330980945659847 [2023-08-31 22:21:10,044 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1842 transitions. [2023-08-31 22:21:10,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1842 transitions. [2023-08-31 22:21:10,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:10,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1842 transitions. [2023-08-31 22:21:10,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.69230769230768) internal successors, (1842), 13 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,055 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 327.0) internal successors, (4578), 14 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,055 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 254 flow. Second operand 13 states and 1842 transitions. [2023-08-31 22:21:10,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 894 flow [2023-08-31 22:21:10,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 155 transitions, 872 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:10,061 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 360 flow [2023-08-31 22:21:10,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=360, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-31 22:21:10,062 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2023-08-31 22:21:10,062 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 360 flow [2023-08-31 22:21:10,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:10,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:10,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:21:10,064 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:10,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash -891010450, now seen corresponding path program 1 times [2023-08-31 22:21:10,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:10,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123191723] [2023-08-31 22:21:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:10,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:10,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:10,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123191723] [2023-08-31 22:21:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123191723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:10,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:21:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005166080] [2023-08-31 22:21:10,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:21:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:21:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:21:10,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 327 [2023-08-31 22:21:10,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:10,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 327 [2023-08-31 22:21:10,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:10,621 INFO L130 PetriNetUnfolder]: 763/1464 cut-off events. [2023-08-31 22:21:10,622 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-31 22:21:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1464 events. 763/1464 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6962 event pairs, 81 based on Foata normal form. 0/1406 useless extension candidates. Maximal degree in co-relation 4405. Up to 656 conditions per place. [2023-08-31 22:21:10,633 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 77 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2023-08-31 22:21:10,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 743 flow [2023-08-31 22:21:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:21:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:21:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2023-08-31 22:21:10,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658511722731906 [2023-08-31 22:21:10,637 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2023-08-31 22:21:10,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2023-08-31 22:21:10,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:10,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2023-08-31 22:21:10,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,646 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,646 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 360 flow. Second operand 9 states and 1371 transitions. [2023-08-31 22:21:10,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 743 flow [2023-08-31 22:21:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 727 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:10,653 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 482 flow [2023-08-31 22:21:10,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=482, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-31 22:21:10,654 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2023-08-31 22:21:10,654 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 482 flow [2023-08-31 22:21:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:10,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:21:10,655 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:10,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash -72479684, now seen corresponding path program 1 times [2023-08-31 22:21:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055983582] [2023-08-31 22:21:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:10,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:10,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055983582] [2023-08-31 22:21:10,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055983582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:10,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:10,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501140348] [2023-08-31 22:21:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:10,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:10,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 22:21:10,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:10,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 22:21:10,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:10,953 INFO L130 PetriNetUnfolder]: 987/1898 cut-off events. [2023-08-31 22:21:10,953 INFO L131 PetriNetUnfolder]: For 2198/2202 co-relation queries the response was YES. [2023-08-31 22:21:10,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 1898 events. 987/1898 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9777 event pairs, 573 based on Foata normal form. 70/1886 useless extension candidates. Maximal degree in co-relation 6033. Up to 1351 conditions per place. [2023-08-31 22:21:10,966 INFO L137 encePairwiseOnDemand]: 323/327 looper letters, 110 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-08-31 22:21:10,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1007 flow [2023-08-31 22:21:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-31 22:21:10,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527013251783894 [2023-08-31 22:21:10,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-31 22:21:10,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-31 22:21:10,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:10,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-31 22:21:10,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,972 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 482 flow. Second operand 3 states and 517 transitions. [2023-08-31 22:21:10,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1007 flow [2023-08-31 22:21:10,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 925 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-31 22:21:10,984 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 449 flow [2023-08-31 22:21:10,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-31 22:21:10,985 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-31 22:21:10,985 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 449 flow [2023-08-31 22:21:10,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:10,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:10,986 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 22:21:10,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:21:10,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:10,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1459253539, now seen corresponding path program 1 times [2023-08-31 22:21:10,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:10,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557777071] [2023-08-31 22:21:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:10,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:11,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:11,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557777071] [2023-08-31 22:21:11,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557777071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:11,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274624258] [2023-08-31 22:21:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:11,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:11,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:21:11,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 22:21:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:11,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 22:21:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:11,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:11,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274624258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:11,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:11,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-31 22:21:11,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295579762] [2023-08-31 22:21:11,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:11,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 22:21:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 22:21:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-31 22:21:11,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 22:21:11,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 449 flow. Second operand has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:11,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:11,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 22:21:11,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:12,127 INFO L130 PetriNetUnfolder]: 2081/3874 cut-off events. [2023-08-31 22:21:12,127 INFO L131 PetriNetUnfolder]: For 3811/3811 co-relation queries the response was YES. [2023-08-31 22:21:12,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 3874 events. 2081/3874 cut-off events. For 3811/3811 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 20117 event pairs, 473 based on Foata normal form. 96/3952 useless extension candidates. Maximal degree in co-relation 12489. Up to 989 conditions per place. [2023-08-31 22:21:12,153 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 226 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2023-08-31 22:21:12,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 278 transitions, 2002 flow [2023-08-31 22:21:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:21:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:21:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2488 transitions. [2023-08-31 22:21:12,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47553516819571867 [2023-08-31 22:21:12,161 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2488 transitions. [2023-08-31 22:21:12,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2488 transitions. [2023-08-31 22:21:12,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:12,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2488 transitions. [2023-08-31 22:21:12,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.5) internal successors, (2488), 16 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,176 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 327.0) internal successors, (5559), 17 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,176 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 449 flow. Second operand 16 states and 2488 transitions. [2023-08-31 22:21:12,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 278 transitions, 2002 flow [2023-08-31 22:21:12,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 278 transitions, 1986 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:12,231 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 959 flow [2023-08-31 22:21:12,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-31 22:21:12,231 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 60 predicate places. [2023-08-31 22:21:12,231 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 959 flow [2023-08-31 22:21:12,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 145.33333333333334) internal successors, (2180), 15 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:12,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:12,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:12,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:12,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 22:21:12,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:12,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1566742044, now seen corresponding path program 1 times [2023-08-31 22:21:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:12,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747917571] [2023-08-31 22:21:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747917571] [2023-08-31 22:21:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747917571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:12,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:12,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:21:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718437443] [2023-08-31 22:21:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:21:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:21:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:21:14,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-31 22:21:14,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 959 flow. Second operand has 14 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:14,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:14,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-31 22:21:14,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:16,598 INFO L130 PetriNetUnfolder]: 3566/6769 cut-off events. [2023-08-31 22:21:16,598 INFO L131 PetriNetUnfolder]: For 13994/13994 co-relation queries the response was YES. [2023-08-31 22:21:16,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25118 conditions, 6769 events. 3566/6769 cut-off events. For 13994/13994 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41806 event pairs, 744 based on Foata normal form. 24/6745 useless extension candidates. Maximal degree in co-relation 25081. Up to 1479 conditions per place. [2023-08-31 22:21:16,649 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 194 selfloop transitions, 191 changer transitions 0/392 dead transitions. [2023-08-31 22:21:16,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 392 transitions, 3518 flow [2023-08-31 22:21:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 22:21:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 22:21:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4797 transitions. [2023-08-31 22:21:16,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074923547400612 [2023-08-31 22:21:16,663 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4797 transitions. [2023-08-31 22:21:16,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4797 transitions. [2023-08-31 22:21:16,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:16,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4797 transitions. [2023-08-31 22:21:16,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 133.25) internal successors, (4797), 36 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:16,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 327.0) internal successors, (12099), 37 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:16,694 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 327.0) internal successors, (12099), 37 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:16,694 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 959 flow. Second operand 36 states and 4797 transitions. [2023-08-31 22:21:16,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 392 transitions, 3518 flow [2023-08-31 22:21:16,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 392 transitions, 3261 flow, removed 125 selfloop flow, removed 2 redundant places. [2023-08-31 22:21:16,767 INFO L231 Difference]: Finished difference. Result has 149 places, 254 transitions, 2617 flow [2023-08-31 22:21:16,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2617, PETRI_PLACES=149, PETRI_TRANSITIONS=254} [2023-08-31 22:21:16,769 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 101 predicate places. [2023-08-31 22:21:16,769 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 254 transitions, 2617 flow [2023-08-31 22:21:16,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.5) internal successors, (1799), 14 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:16,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:16,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:16,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:21:16,770 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:16,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash -686962716, now seen corresponding path program 2 times [2023-08-31 22:21:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:16,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677147935] [2023-08-31 22:21:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:16,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677147935] [2023-08-31 22:21:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677147935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:17,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:17,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:21:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700604080] [2023-08-31 22:21:17,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:21:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:21:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:21:18,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-31 22:21:18,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 254 transitions, 2617 flow. Second operand has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:18,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:18,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-31 22:21:18,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:20,300 INFO L130 PetriNetUnfolder]: 3798/7207 cut-off events. [2023-08-31 22:21:20,300 INFO L131 PetriNetUnfolder]: For 15690/15690 co-relation queries the response was YES. [2023-08-31 22:21:20,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29085 conditions, 7207 events. 3798/7207 cut-off events. For 15690/15690 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 45113 event pairs, 1655 based on Foata normal form. 6/7160 useless extension candidates. Maximal degree in co-relation 29041. Up to 5881 conditions per place. [2023-08-31 22:21:20,342 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 315 selfloop transitions, 41 changer transitions 0/363 dead transitions. [2023-08-31 22:21:20,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 363 transitions, 3953 flow [2023-08-31 22:21:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:21:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:21:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1811 transitions. [2023-08-31 22:21:20,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39558759283529926 [2023-08-31 22:21:20,346 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1811 transitions. [2023-08-31 22:21:20,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1811 transitions. [2023-08-31 22:21:20,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:20,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1811 transitions. [2023-08-31 22:21:20,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 129.35714285714286) internal successors, (1811), 14 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:20,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:20,354 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:20,355 INFO L175 Difference]: Start difference. First operand has 149 places, 254 transitions, 2617 flow. Second operand 14 states and 1811 transitions. [2023-08-31 22:21:20,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 363 transitions, 3953 flow [2023-08-31 22:21:20,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 363 transitions, 3723 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:20,483 INFO L231 Difference]: Finished difference. Result has 168 places, 275 transitions, 2751 flow [2023-08-31 22:21:20,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2751, PETRI_PLACES=168, PETRI_TRANSITIONS=275} [2023-08-31 22:21:20,484 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 120 predicate places. [2023-08-31 22:21:20,484 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 275 transitions, 2751 flow [2023-08-31 22:21:20,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:20,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:20,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:21:20,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:20,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1121809114, now seen corresponding path program 3 times [2023-08-31 22:21:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552630948] [2023-08-31 22:21:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:21,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:21,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552630948] [2023-08-31 22:21:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552630948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:21,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:21,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:21:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794552385] [2023-08-31 22:21:21,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:21,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:21:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:21:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:21:22,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-31 22:21:22,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 275 transitions, 2751 flow. Second operand has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:22,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:22,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-31 22:21:22,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:23,875 INFO L130 PetriNetUnfolder]: 3792/7195 cut-off events. [2023-08-31 22:21:23,876 INFO L131 PetriNetUnfolder]: For 13316/13316 co-relation queries the response was YES. [2023-08-31 22:21:23,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28463 conditions, 7195 events. 3792/7195 cut-off events. For 13316/13316 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 44987 event pairs, 1577 based on Foata normal form. 6/7107 useless extension candidates. Maximal degree in co-relation 28411. Up to 5472 conditions per place. [2023-08-31 22:21:23,920 INFO L137 encePairwiseOnDemand]: 311/327 looper letters, 305 selfloop transitions, 50 changer transitions 0/362 dead transitions. [2023-08-31 22:21:23,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 362 transitions, 3881 flow [2023-08-31 22:21:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:21:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:21:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1931 transitions. [2023-08-31 22:21:23,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39367991845056066 [2023-08-31 22:21:23,924 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1931 transitions. [2023-08-31 22:21:23,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1931 transitions. [2023-08-31 22:21:23,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:23,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1931 transitions. [2023-08-31 22:21:23,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.73333333333332) internal successors, (1931), 15 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 327.0) internal successors, (5232), 16 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,933 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 327.0) internal successors, (5232), 16 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:23,933 INFO L175 Difference]: Start difference. First operand has 168 places, 275 transitions, 2751 flow. Second operand 15 states and 1931 transitions. [2023-08-31 22:21:23,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 362 transitions, 3881 flow [2023-08-31 22:21:24,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 362 transitions, 3839 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-31 22:21:24,041 INFO L231 Difference]: Finished difference. Result has 180 places, 281 transitions, 2913 flow [2023-08-31 22:21:24,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2913, PETRI_PLACES=180, PETRI_TRANSITIONS=281} [2023-08-31 22:21:24,042 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 132 predicate places. [2023-08-31 22:21:24,042 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 281 transitions, 2913 flow [2023-08-31 22:21:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.3125) internal successors, (1941), 16 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:24,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:24,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:21:24,044 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:24,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash 36144378, now seen corresponding path program 1 times [2023-08-31 22:21:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456795275] [2023-08-31 22:21:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:24,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:24,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456795275] [2023-08-31 22:21:24,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456795275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:24,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017322732] [2023-08-31 22:21:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:24,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:24,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:24,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:21:24,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 22:21:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:21:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:24,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:24,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017322732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:24,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:24,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:21:24,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20552216] [2023-08-31 22:21:24,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:24,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:21:24,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:21:24,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:21:24,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-31 22:21:24,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 281 transitions, 2913 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:24,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:24,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-31 22:21:24,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:26,250 INFO L130 PetriNetUnfolder]: 6111/12492 cut-off events. [2023-08-31 22:21:26,250 INFO L131 PetriNetUnfolder]: For 29175/29199 co-relation queries the response was YES. [2023-08-31 22:21:26,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50017 conditions, 12492 events. 6111/12492 cut-off events. For 29175/29199 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 95065 event pairs, 2081 based on Foata normal form. 1782/14093 useless extension candidates. Maximal degree in co-relation 49961. Up to 3306 conditions per place. [2023-08-31 22:21:26,331 INFO L137 encePairwiseOnDemand]: 322/327 looper letters, 731 selfloop transitions, 20 changer transitions 0/789 dead transitions. [2023-08-31 22:21:26,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 789 transitions, 9867 flow [2023-08-31 22:21:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:21:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:21:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1036 transitions. [2023-08-31 22:21:26,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528032619775739 [2023-08-31 22:21:26,333 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1036 transitions. [2023-08-31 22:21:26,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1036 transitions. [2023-08-31 22:21:26,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:26,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1036 transitions. [2023-08-31 22:21:26,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.66666666666666) internal successors, (1036), 6 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,337 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,337 INFO L175 Difference]: Start difference. First operand has 180 places, 281 transitions, 2913 flow. Second operand 6 states and 1036 transitions. [2023-08-31 22:21:26,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 789 transitions, 9867 flow [2023-08-31 22:21:26,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 789 transitions, 9711 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-31 22:21:26,638 INFO L231 Difference]: Finished difference. Result has 179 places, 290 transitions, 3007 flow [2023-08-31 22:21:26,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3007, PETRI_PLACES=179, PETRI_TRANSITIONS=290} [2023-08-31 22:21:26,638 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 131 predicate places. [2023-08-31 22:21:26,639 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 290 transitions, 3007 flow [2023-08-31 22:21:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:26,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:26,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:26,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:26,841 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:26,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1551124284, now seen corresponding path program 1 times [2023-08-31 22:21:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:26,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146627303] [2023-08-31 22:21:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 22:21:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146627303] [2023-08-31 22:21:26,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146627303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:26,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:26,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:21:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247821248] [2023-08-31 22:21:26,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:21:26,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:21:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:21:26,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 327 [2023-08-31 22:21:26,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 290 transitions, 3007 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:26,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:26,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 327 [2023-08-31 22:21:26,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:28,876 INFO L130 PetriNetUnfolder]: 6166/12468 cut-off events. [2023-08-31 22:21:28,876 INFO L131 PetriNetUnfolder]: For 36524/36548 co-relation queries the response was YES. [2023-08-31 22:21:28,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53631 conditions, 12468 events. 6166/12468 cut-off events. For 36524/36548 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 92242 event pairs, 3463 based on Foata normal form. 426/12697 useless extension candidates. Maximal degree in co-relation 53572. Up to 8461 conditions per place. [2023-08-31 22:21:28,962 INFO L137 encePairwiseOnDemand]: 321/327 looper letters, 245 selfloop transitions, 37 changer transitions 0/311 dead transitions. [2023-08-31 22:21:28,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 311 transitions, 3710 flow [2023-08-31 22:21:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:21:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:21:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-31 22:21:28,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127420998980632 [2023-08-31 22:21:28,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-31 22:21:28,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-31 22:21:28,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:28,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-31 22:21:28,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:28,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:28,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:28,966 INFO L175 Difference]: Start difference. First operand has 179 places, 290 transitions, 3007 flow. Second operand 3 states and 503 transitions. [2023-08-31 22:21:28,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 311 transitions, 3710 flow [2023-08-31 22:21:29,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 311 transitions, 3630 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 22:21:29,134 INFO L231 Difference]: Finished difference. Result has 173 places, 267 transitions, 2921 flow [2023-08-31 22:21:29,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2921, PETRI_PLACES=173, PETRI_TRANSITIONS=267} [2023-08-31 22:21:29,134 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 125 predicate places. [2023-08-31 22:21:29,134 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 267 transitions, 2921 flow [2023-08-31 22:21:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:29,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:29,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:29,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:21:29,135 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:29,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -53631562, now seen corresponding path program 1 times [2023-08-31 22:21:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395350449] [2023-08-31 22:21:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:29,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:29,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395350449] [2023-08-31 22:21:29,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395350449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:29,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218705521] [2023-08-31 22:21:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:29,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:29,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:29,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:21:29,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 22:21:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 22:21:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:29,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:30,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:21:30,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-31 22:21:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:30,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218705521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:30,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:30,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-08-31 22:21:30,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158790031] [2023-08-31 22:21:30,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 22:21:30,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 22:21:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-08-31 22:21:32,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-31 22:21:32,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 267 transitions, 2921 flow. Second operand has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:32,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:32,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-31 22:21:32,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:37,200 INFO L130 PetriNetUnfolder]: 6659/13084 cut-off events. [2023-08-31 22:21:37,200 INFO L131 PetriNetUnfolder]: For 42965/42965 co-relation queries the response was YES. [2023-08-31 22:21:37,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57194 conditions, 13084 events. 6659/13084 cut-off events. For 42965/42965 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 94768 event pairs, 913 based on Foata normal form. 118/13067 useless extension candidates. Maximal degree in co-relation 57136. Up to 4005 conditions per place. [2023-08-31 22:21:37,280 INFO L137 encePairwiseOnDemand]: 312/327 looper letters, 239 selfloop transitions, 247 changer transitions 0/486 dead transitions. [2023-08-31 22:21:37,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 486 transitions, 5204 flow [2023-08-31 22:21:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 22:21:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 22:21:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4719 transitions. [2023-08-31 22:21:37,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41231979030144167 [2023-08-31 22:21:37,284 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4719 transitions. [2023-08-31 22:21:37,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4719 transitions. [2023-08-31 22:21:37,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:37,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4719 transitions. [2023-08-31 22:21:37,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 134.82857142857142) internal successors, (4719), 35 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,300 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 327.0) internal successors, (11772), 36 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,301 INFO L175 Difference]: Start difference. First operand has 173 places, 267 transitions, 2921 flow. Second operand 35 states and 4719 transitions. [2023-08-31 22:21:37,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 486 transitions, 5204 flow [2023-08-31 22:21:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 486 transitions, 5083 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-31 22:21:37,530 INFO L231 Difference]: Finished difference. Result has 203 places, 313 transitions, 3755 flow [2023-08-31 22:21:37,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3755, PETRI_PLACES=203, PETRI_TRANSITIONS=313} [2023-08-31 22:21:37,531 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 155 predicate places. [2023-08-31 22:21:37,531 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 313 transitions, 3755 flow [2023-08-31 22:21:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 130.05714285714285) internal successors, (4552), 35 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:37,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:37,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:37,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:37,733 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:37,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2127084341, now seen corresponding path program 1 times [2023-08-31 22:21:37,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:37,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695398970] [2023-08-31 22:21:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:21:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695398970] [2023-08-31 22:21:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695398970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:21:37,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:21:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:21:37,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260355499] [2023-08-31 22:21:37,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:21:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:21:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:21:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:21:37,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 22:21:37,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 313 transitions, 3755 flow. Second operand has 7 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:37,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:37,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 22:21:37,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:39,737 INFO L130 PetriNetUnfolder]: 6734/13269 cut-off events. [2023-08-31 22:21:39,737 INFO L131 PetriNetUnfolder]: For 42780/42780 co-relation queries the response was YES. [2023-08-31 22:21:39,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60981 conditions, 13269 events. 6734/13269 cut-off events. For 42780/42780 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 96270 event pairs, 2316 based on Foata normal form. 76/13214 useless extension candidates. Maximal degree in co-relation 60924. Up to 7635 conditions per place. [2023-08-31 22:21:39,852 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 323 selfloop transitions, 74 changer transitions 0/397 dead transitions. [2023-08-31 22:21:39,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 397 transitions, 5195 flow [2023-08-31 22:21:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:21:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:21:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1077 transitions. [2023-08-31 22:21:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705111402359109 [2023-08-31 22:21:39,854 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1077 transitions. [2023-08-31 22:21:39,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1077 transitions. [2023-08-31 22:21:39,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:39,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1077 transitions. [2023-08-31 22:21:39,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.85714285714286) internal successors, (1077), 7 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 327.0) internal successors, (2616), 8 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:39,858 INFO L175 Difference]: Start difference. First operand has 203 places, 313 transitions, 3755 flow. Second operand 7 states and 1077 transitions. [2023-08-31 22:21:39,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 397 transitions, 5195 flow [2023-08-31 22:21:40,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 397 transitions, 4519 flow, removed 196 selfloop flow, removed 16 redundant places. [2023-08-31 22:21:40,254 INFO L231 Difference]: Finished difference. Result has 197 places, 314 transitions, 3419 flow [2023-08-31 22:21:40,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3419, PETRI_PLACES=197, PETRI_TRANSITIONS=314} [2023-08-31 22:21:40,254 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 149 predicate places. [2023-08-31 22:21:40,254 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 314 transitions, 3419 flow [2023-08-31 22:21:40,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:40,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:40,255 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-31 22:21:40,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:21:40,255 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:40,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1366491074, now seen corresponding path program 2 times [2023-08-31 22:21:40,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:40,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714715400] [2023-08-31 22:21:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:41,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714715400] [2023-08-31 22:21:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714715400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141797124] [2023-08-31 22:21:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:21:41,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:41,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:21:41,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 22:21:41,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:21:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:21:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 22:21:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:41,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:21:41,527 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:21:41,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-31 22:21:41,548 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-31 22:21:41,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-31 22:21:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:42,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141797124] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:42,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:42,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 40 [2023-08-31 22:21:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759924016] [2023-08-31 22:21:42,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-31 22:21:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:42,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-31 22:21:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2023-08-31 22:21:46,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 22:21:46,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 314 transitions, 3419 flow. Second operand has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:46,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:46,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 22:21:46,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:21:51,643 INFO L130 PetriNetUnfolder]: 9424/18567 cut-off events. [2023-08-31 22:21:51,643 INFO L131 PetriNetUnfolder]: For 56609/56609 co-relation queries the response was YES. [2023-08-31 22:21:51,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82085 conditions, 18567 events. 9424/18567 cut-off events. For 56609/56609 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 135589 event pairs, 2920 based on Foata normal form. 234/18494 useless extension candidates. Maximal degree in co-relation 82028. Up to 10753 conditions per place. [2023-08-31 22:21:51,930 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 594 selfloop transitions, 136 changer transitions 0/730 dead transitions. [2023-08-31 22:21:51,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 730 transitions, 8164 flow [2023-08-31 22:21:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:21:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:21:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4375 transitions. [2023-08-31 22:21:51,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445973496432212 [2023-08-31 22:21:51,934 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4375 transitions. [2023-08-31 22:21:51,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4375 transitions. [2023-08-31 22:21:51,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:21:51,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4375 transitions. [2023-08-31 22:21:51,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 145.83333333333334) internal successors, (4375), 30 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:51,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 327.0) internal successors, (10137), 31 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:51,944 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 327.0) internal successors, (10137), 31 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:51,944 INFO L175 Difference]: Start difference. First operand has 197 places, 314 transitions, 3419 flow. Second operand 30 states and 4375 transitions. [2023-08-31 22:21:51,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 730 transitions, 8164 flow [2023-08-31 22:21:52,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 730 transitions, 8126 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-31 22:21:52,280 INFO L231 Difference]: Finished difference. Result has 237 places, 399 transitions, 4929 flow [2023-08-31 22:21:52,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4929, PETRI_PLACES=237, PETRI_TRANSITIONS=399} [2023-08-31 22:21:52,280 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 189 predicate places. [2023-08-31 22:21:52,280 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 399 transitions, 4929 flow [2023-08-31 22:21:52,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 136.92857142857142) internal successors, (5751), 42 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:52,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:21:52,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:21:52,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 22:21:52,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 22:21:52,488 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:21:52,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:21:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 732416370, now seen corresponding path program 4 times [2023-08-31 22:21:52,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:21:52,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618886464] [2023-08-31 22:21:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:21:52,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:21:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:21:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:54,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:21:54,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618886464] [2023-08-31 22:21:54,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618886464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:21:54,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453464061] [2023-08-31 22:21:54,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:21:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:21:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:21:54,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:21:54,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 22:21:54,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:21:54,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:21:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-31 22:21:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:21:54,885 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 22:21:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-31 22:21:55,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 22:21:55,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-31 22:21:56,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-31 22:21:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:21:56,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:21:56,599 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_646) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-31 22:21:56,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:21:56,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-31 22:21:56,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:21:56,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-31 22:21:56,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-31 22:21:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:21:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453464061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:21:56,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:21:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 14] total 50 [2023-08-31 22:21:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378537648] [2023-08-31 22:21:56,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:21:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-31 22:21:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:21:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-31 22:21:56,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2359, Unknown=1, NotChecked=98, Total=2652 [2023-08-31 22:21:57,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-31 22:21:57,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 399 transitions, 4929 flow. Second operand has 52 states, 52 states have (on average 88.61538461538461) internal successors, (4608), 52 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:21:57,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:21:57,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-31 22:21:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:21,405 INFO L130 PetriNetUnfolder]: 11673/23042 cut-off events. [2023-08-31 22:22:21,405 INFO L131 PetriNetUnfolder]: For 80460/80460 co-relation queries the response was YES. [2023-08-31 22:22:21,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105262 conditions, 23042 events. 11673/23042 cut-off events. For 80460/80460 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 178448 event pairs, 1492 based on Foata normal form. 90/22754 useless extension candidates. Maximal degree in co-relation 105193. Up to 5172 conditions per place. [2023-08-31 22:22:21,638 INFO L137 encePairwiseOnDemand]: 308/327 looper letters, 442 selfloop transitions, 552 changer transitions 0/994 dead transitions. [2023-08-31 22:22:21,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 994 transitions, 11042 flow [2023-08-31 22:22:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-31 22:22:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-31 22:22:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8609 transitions. [2023-08-31 22:22:21,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28308835618690603 [2023-08-31 22:22:21,648 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8609 transitions. [2023-08-31 22:22:21,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8609 transitions. [2023-08-31 22:22:21,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:21,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8609 transitions. [2023-08-31 22:22:21,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 92.56989247311827) internal successors, (8609), 93 states have internal predecessors, (8609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 327.0) internal successors, (30738), 94 states have internal predecessors, (30738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,687 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 327.0) internal successors, (30738), 94 states have internal predecessors, (30738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:21,687 INFO L175 Difference]: Start difference. First operand has 237 places, 399 transitions, 4929 flow. Second operand 93 states and 8609 transitions. [2023-08-31 22:22:21,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 994 transitions, 11042 flow [2023-08-31 22:22:22,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 994 transitions, 10811 flow, removed 87 selfloop flow, removed 10 redundant places. [2023-08-31 22:22:22,361 INFO L231 Difference]: Finished difference. Result has 325 places, 610 transitions, 8164 flow [2023-08-31 22:22:22,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=8164, PETRI_PLACES=325, PETRI_TRANSITIONS=610} [2023-08-31 22:22:22,362 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 277 predicate places. [2023-08-31 22:22:22,362 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 610 transitions, 8164 flow [2023-08-31 22:22:22,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 88.61538461538461) internal successors, (4608), 52 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:22,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:22,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:22,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:22,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:22,563 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:22,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -894263952, now seen corresponding path program 2 times [2023-08-31 22:22:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:22,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551541997] [2023-08-31 22:22:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:22,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:23,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551541997] [2023-08-31 22:22:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551541997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949367412] [2023-08-31 22:22:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:22:23,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:23,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:22:23,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 22:22:23,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:22:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 22:22:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:23,348 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:22:23,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-31 22:22:23,368 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-31 22:22:23,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2023-08-31 22:22:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:23,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:24,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949367412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:24,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:24,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2023-08-31 22:22:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002814059] [2023-08-31 22:22:24,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:24,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-31 22:22:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-31 22:22:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2023-08-31 22:22:27,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 327 [2023-08-31 22:22:28,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 610 transitions, 8164 flow. Second operand has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:28,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:28,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 327 [2023-08-31 22:22:28,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:35,217 INFO L130 PetriNetUnfolder]: 13677/27010 cut-off events. [2023-08-31 22:22:35,217 INFO L131 PetriNetUnfolder]: For 99442/99442 co-relation queries the response was YES. [2023-08-31 22:22:35,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131079 conditions, 27010 events. 13677/27010 cut-off events. For 99442/99442 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 216428 event pairs, 3488 based on Foata normal form. 80/26684 useless extension candidates. Maximal degree in co-relation 131003. Up to 15132 conditions per place. [2023-08-31 22:22:35,464 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 808 selfloop transitions, 171 changer transitions 0/979 dead transitions. [2023-08-31 22:22:35,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 979 transitions, 13381 flow [2023-08-31 22:22:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 22:22:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 22:22:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3956 transitions. [2023-08-31 22:22:35,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171675630074871 [2023-08-31 22:22:35,469 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3956 transitions. [2023-08-31 22:22:35,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3956 transitions. [2023-08-31 22:22:35,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:35,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3956 transitions. [2023-08-31 22:22:35,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 136.41379310344828) internal successors, (3956), 29 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:35,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:35,480 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 327.0) internal successors, (9810), 30 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:35,480 INFO L175 Difference]: Start difference. First operand has 325 places, 610 transitions, 8164 flow. Second operand 29 states and 3956 transitions. [2023-08-31 22:22:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 979 transitions, 13381 flow [2023-08-31 22:22:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 979 transitions, 12180 flow, removed 383 selfloop flow, removed 31 redundant places. [2023-08-31 22:22:36,271 INFO L231 Difference]: Finished difference. Result has 334 places, 688 transitions, 8828 flow [2023-08-31 22:22:36,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8828, PETRI_PLACES=334, PETRI_TRANSITIONS=688} [2023-08-31 22:22:36,272 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 286 predicate places. [2023-08-31 22:22:36,272 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 688 transitions, 8828 flow [2023-08-31 22:22:36,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 129.26829268292684) internal successors, (5300), 41 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:36,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:36,273 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:36,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:36,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:36,474 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:36,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2078093252, now seen corresponding path program 2 times [2023-08-31 22:22:36,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:36,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254332] [2023-08-31 22:22:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-31 22:22:36,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:36,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254332] [2023-08-31 22:22:36,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:36,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710462065] [2023-08-31 22:22:36,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:22:36,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:36,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:36,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:22:36,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 22:22:36,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 22:22:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:22:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 22:22:36,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-31 22:22:36,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 22:22:36,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710462065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:22:36,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 22:22:36,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-31 22:22:36,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214222469] [2023-08-31 22:22:36,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:22:36,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:22:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:22:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:22:37,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-31 22:22:37,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 688 transitions, 8828 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:37,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:22:37,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-31 22:22:37,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:22:42,343 INFO L130 PetriNetUnfolder]: 12187/25177 cut-off events. [2023-08-31 22:22:42,343 INFO L131 PetriNetUnfolder]: For 87484/87591 co-relation queries the response was YES. [2023-08-31 22:22:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118785 conditions, 25177 events. 12187/25177 cut-off events. For 87484/87591 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 209923 event pairs, 9819 based on Foata normal form. 90/24798 useless extension candidates. Maximal degree in co-relation 118707. Up to 23802 conditions per place. [2023-08-31 22:22:42,583 INFO L137 encePairwiseOnDemand]: 325/327 looper letters, 574 selfloop transitions, 1 changer transitions 1/676 dead transitions. [2023-08-31 22:22:42,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 676 transitions, 9902 flow [2023-08-31 22:22:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:22:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:22:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-31 22:22:42,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47604485219164117 [2023-08-31 22:22:42,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-31 22:22:42,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-31 22:22:42,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:22:42,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-31 22:22:42,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:42,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:42,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:42,586 INFO L175 Difference]: Start difference. First operand has 334 places, 688 transitions, 8828 flow. Second operand 3 states and 467 transitions. [2023-08-31 22:22:42,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 676 transitions, 9902 flow [2023-08-31 22:22:43,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 676 transitions, 9795 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-31 22:22:43,392 INFO L231 Difference]: Finished difference. Result has 314 places, 675 transitions, 8642 flow [2023-08-31 22:22:43,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=8643, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8642, PETRI_PLACES=314, PETRI_TRANSITIONS=675} [2023-08-31 22:22:43,392 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 266 predicate places. [2023-08-31 22:22:43,393 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 675 transitions, 8642 flow [2023-08-31 22:22:43,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:22:43,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:22:43,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:22:43,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 22:22:43,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 22:22:43,593 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:22:43,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:22:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1972717191, now seen corresponding path program 1 times [2023-08-31 22:22:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:22:43,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182667236] [2023-08-31 22:22:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:22:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:44,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:22:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182667236] [2023-08-31 22:22:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182667236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:22:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334267399] [2023-08-31 22:22:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:22:44,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:22:44,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:22:44,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:22:44,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 22:22:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:22:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-31 22:22:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:22:44,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 22:22:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:22:45,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2023-08-31 22:22:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-31 22:22:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:45,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:22:46,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-31 22:22:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:22:46,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334267399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:22:46,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:22:46,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 58 [2023-08-31 22:22:46,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763178900] [2023-08-31 22:22:46,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:22:46,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-08-31 22:22:46,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:22:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-08-31 22:22:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3215, Unknown=0, NotChecked=0, Total=3422 [2023-08-31 22:22:50,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:22:54,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:23:00,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 327 [2023-08-31 22:23:00,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 675 transitions, 8642 flow. Second operand has 59 states, 59 states have (on average 121.83050847457628) internal successors, (7188), 59 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:00,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:00,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 327 [2023-08-31 22:23:00,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:23:41,799 INFO L130 PetriNetUnfolder]: 22290/43807 cut-off events. [2023-08-31 22:23:41,800 INFO L131 PetriNetUnfolder]: For 147048/147048 co-relation queries the response was YES. [2023-08-31 22:23:42,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205161 conditions, 43807 events. 22290/43807 cut-off events. For 147048/147048 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 383948 event pairs, 3812 based on Foata normal form. 284/43567 useless extension candidates. Maximal degree in co-relation 205082. Up to 8549 conditions per place. [2023-08-31 22:23:42,407 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 666 selfloop transitions, 1185 changer transitions 127/1978 dead transitions. [2023-08-31 22:23:42,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1978 transitions, 23977 flow [2023-08-31 22:23:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-08-31 22:23:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2023-08-31 22:23:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 22641 transitions. [2023-08-31 22:23:42,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825333265750925 [2023-08-31 22:23:42,430 INFO L72 ComplementDD]: Start complementDD. Operand 181 states and 22641 transitions. [2023-08-31 22:23:42,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 181 states and 22641 transitions. [2023-08-31 22:23:42,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:23:42,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 181 states and 22641 transitions. [2023-08-31 22:23:42,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 182 states, 181 states have (on average 125.08839779005525) internal successors, (22641), 181 states have internal predecessors, (22641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:42,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 182 states, 182 states have (on average 327.0) internal successors, (59514), 182 states have internal predecessors, (59514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:42,513 INFO L81 ComplementDD]: Finished complementDD. Result has 182 states, 182 states have (on average 327.0) internal successors, (59514), 182 states have internal predecessors, (59514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:42,514 INFO L175 Difference]: Start difference. First operand has 314 places, 675 transitions, 8642 flow. Second operand 181 states and 22641 transitions. [2023-08-31 22:23:42,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1978 transitions, 23977 flow [2023-08-31 22:23:44,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1978 transitions, 23972 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 22:23:44,053 INFO L231 Difference]: Finished difference. Result has 505 places, 1297 transitions, 19351 flow [2023-08-31 22:23:44,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=8639, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=181, PETRI_FLOW=19351, PETRI_PLACES=505, PETRI_TRANSITIONS=1297} [2023-08-31 22:23:44,054 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 457 predicate places. [2023-08-31 22:23:44,054 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1297 transitions, 19351 flow [2023-08-31 22:23:44,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 121.83050847457628) internal successors, (7188), 59 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:44,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:23:44,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:23:44,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 22:23:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 22:23:44,258 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:23:44,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:23:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash 796650369, now seen corresponding path program 2 times [2023-08-31 22:23:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:23:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547553543] [2023-08-31 22:23:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:23:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:23:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:23:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:23:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547553543] [2023-08-31 22:23:45,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547553543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:23:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87770781] [2023-08-31 22:23:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:23:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:23:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:23:45,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:23:45,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 22:23:45,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:23:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:23:45,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-31 22:23:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:23:45,922 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 22:23:45,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-31 22:23:46,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 22:23:46,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-31 22:23:46,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-08-31 22:23:47,360 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 22:23:47,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-31 22:23:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:47,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:23:50,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:23:50,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-31 22:23:50,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:23:50,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2023-08-31 22:23:50,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-08-31 22:23:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:23:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87770781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:23:51,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:23:51,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 67 [2023-08-31 22:23:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928982207] [2023-08-31 22:23:51,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:23:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-31 22:23:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:23:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-31 22:23:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=4281, Unknown=12, NotChecked=0, Total=4692 [2023-08-31 22:23:58,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-31 22:23:58,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1297 transitions, 19351 flow. Second operand has 69 states, 69 states have (on average 88.56521739130434) internal successors, (6111), 69 states have internal predecessors, (6111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:23:58,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:23:58,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-31 22:23:58,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:24:02,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:09,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:11,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:18,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:25,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:28,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:30,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:32,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:38,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:24:54,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:25:11,353 INFO L130 PetriNetUnfolder]: 26412/51755 cut-off events. [2023-08-31 22:25:11,353 INFO L131 PetriNetUnfolder]: For 210291/210291 co-relation queries the response was YES. [2023-08-31 22:25:12,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265203 conditions, 51755 events. 26412/51755 cut-off events. For 210291/210291 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 460304 event pairs, 6118 based on Foata normal form. 44/51199 useless extension candidates. Maximal degree in co-relation 265111. Up to 25993 conditions per place. [2023-08-31 22:25:12,407 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 1420 selfloop transitions, 718 changer transitions 165/2303 dead transitions. [2023-08-31 22:25:12,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 2303 transitions, 34484 flow [2023-08-31 22:25:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-08-31 22:25:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-08-31 22:25:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 8420 transitions. [2023-08-31 22:25:12,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28610261637784573 [2023-08-31 22:25:12,416 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 8420 transitions. [2023-08-31 22:25:12,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 8420 transitions. [2023-08-31 22:25:12,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:25:12,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 8420 transitions. [2023-08-31 22:25:12,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 93.55555555555556) internal successors, (8420), 90 states have internal predecessors, (8420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:12,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 327.0) internal successors, (29757), 91 states have internal predecessors, (29757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:12,453 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 327.0) internal successors, (29757), 91 states have internal predecessors, (29757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:12,453 INFO L175 Difference]: Start difference. First operand has 505 places, 1297 transitions, 19351 flow. Second operand 90 states and 8420 transitions. [2023-08-31 22:25:12,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 2303 transitions, 34484 flow [2023-08-31 22:25:15,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 2303 transitions, 32805 flow, removed 494 selfloop flow, removed 30 redundant places. [2023-08-31 22:25:15,607 INFO L231 Difference]: Finished difference. Result has 590 places, 1728 transitions, 26464 flow [2023-08-31 22:25:15,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=18180, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=26464, PETRI_PLACES=590, PETRI_TRANSITIONS=1728} [2023-08-31 22:25:15,609 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 542 predicate places. [2023-08-31 22:25:15,610 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1728 transitions, 26464 flow [2023-08-31 22:25:15,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 88.56521739130434) internal successors, (6111), 69 states have internal predecessors, (6111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:15,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:25:15,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:25:15,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 22:25:15,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 22:25:15,817 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:25:15,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:25:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1510973619, now seen corresponding path program 3 times [2023-08-31 22:25:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:25:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527418747] [2023-08-31 22:25:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:25:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:25:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:25:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:25:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:25:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527418747] [2023-08-31 22:25:17,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527418747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:25:17,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176508661] [2023-08-31 22:25:17,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 22:25:17,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:25:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:25:17,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:25:17,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 22:25:17,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 22:25:17,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:25:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-31 22:25:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:25:17,489 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-31 22:25:17,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-31 22:25:17,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 22:25:18,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-31 22:25:18,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-08-31 22:25:19,152 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 22:25:19,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 43 [2023-08-31 22:25:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:25:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:25:20,270 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= 4294967294 (mod (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000))) (store .cse1 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse1 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* c_~top~0 4)) v_ArrVal_1002))) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))))) is different from false [2023-08-31 22:25:20,295 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= 4294967294 (mod (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000))) (store .cse1 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse1 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| (* c_~top~0 4)) v_ArrVal_1002))) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))))) is different from false [2023-08-31 22:25:20,312 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< c_~top~0 v_~top~0_94) (< (+ .cse0 |c_~#arr~0.offset|) 4) (not (= (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4)) v_ArrVal_1002) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294))))) is different from false [2023-08-31 22:25:20,337 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 Int) (v_ArrVal_1000 (Array Int Int)) (v_~top~0_94 Int)) (let ((.cse0 (* v_~top~0_94 4))) (or (< (+ .cse0 |c_~#arr~0.offset|) 4) (< (+ |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 1) v_~top~0_94) (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1000) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| 4) v_ArrVal_1002) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))))) is different from false [2023-08-31 22:25:20,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:25:20,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-08-31 22:25:20,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:25:20,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2023-08-31 22:25:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 22:25:20,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2023-08-31 22:25:20,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-31 22:25:20,738 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 22:25:20,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:25:20,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-08-31 22:25:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-31 22:25:21,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176508661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:25:21,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:25:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 66 [2023-08-31 22:25:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822228241] [2023-08-31 22:25:21,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:25:21,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-08-31 22:25:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:25:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-08-31 22:25:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3702, Unknown=12, NotChecked=508, Total=4556 [2023-08-31 22:25:21,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-31 22:25:21,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1728 transitions, 26464 flow. Second operand has 68 states, 68 states have (on average 88.58823529411765) internal successors, (6024), 68 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:25:21,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:25:21,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-31 22:25:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:25:43,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:26:09,502 INFO L130 PetriNetUnfolder]: 30115/59205 cut-off events. [2023-08-31 22:26:09,502 INFO L131 PetriNetUnfolder]: For 273076/273076 co-relation queries the response was YES. [2023-08-31 22:26:10,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310110 conditions, 59205 events. 30115/59205 cut-off events. For 273076/273076 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 538026 event pairs, 11950 based on Foata normal form. 26/58343 useless extension candidates. Maximal degree in co-relation 309998. Up to 45718 conditions per place. [2023-08-31 22:26:11,026 INFO L137 encePairwiseOnDemand]: 302/327 looper letters, 1964 selfloop transitions, 447 changer transitions 123/2534 dead transitions. [2023-08-31 22:26:11,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 2534 transitions, 40245 flow [2023-08-31 22:26:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-31 22:26:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-31 22:26:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 7452 transitions. [2023-08-31 22:26:11,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2848623853211009 [2023-08-31 22:26:11,032 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 7452 transitions. [2023-08-31 22:26:11,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 7452 transitions. [2023-08-31 22:26:11,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:26:11,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 7452 transitions. [2023-08-31 22:26:11,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 93.15) internal successors, (7452), 80 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:11,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 327.0) internal successors, (26487), 81 states have internal predecessors, (26487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:11,061 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 327.0) internal successors, (26487), 81 states have internal predecessors, (26487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:11,061 INFO L175 Difference]: Start difference. First operand has 590 places, 1728 transitions, 26464 flow. Second operand 80 states and 7452 transitions. [2023-08-31 22:26:11,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 2534 transitions, 40245 flow [2023-08-31 22:26:16,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 2534 transitions, 39742 flow, removed 217 selfloop flow, removed 10 redundant places. [2023-08-31 22:26:16,227 INFO L231 Difference]: Finished difference. Result has 693 places, 1993 transitions, 31322 flow [2023-08-31 22:26:16,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=26125, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=31322, PETRI_PLACES=693, PETRI_TRANSITIONS=1993} [2023-08-31 22:26:16,231 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 645 predicate places. [2023-08-31 22:26:16,231 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 1993 transitions, 31322 flow [2023-08-31 22:26:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 88.58823529411765) internal successors, (6024), 68 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:16,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:26:16,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:26:16,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 22:26:16,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 22:26:16,440 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:26:16,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:26:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1892552667, now seen corresponding path program 4 times [2023-08-31 22:26:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:26:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272313365] [2023-08-31 22:26:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:26:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:26:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:26:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:26:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:26:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272313365] [2023-08-31 22:26:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272313365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:26:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215407848] [2023-08-31 22:26:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 22:26:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:26:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:26:17,975 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:26:17,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 22:26:18,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 22:26:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:26:18,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-31 22:26:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:26:18,125 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-31 22:26:18,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-31 22:26:18,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-31 22:26:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:26:19,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 37 [2023-08-31 22:26:19,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-08-31 22:26:20,369 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 22:26:20,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 44 [2023-08-31 22:26:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:26:20,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:26:21,742 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-08-31 22:26:21,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 62 [2023-08-31 22:26:21,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:26:21,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2023-08-31 22:26:21,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-31 22:26:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:26:22,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215407848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:26:22,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:26:22,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 70 [2023-08-31 22:26:22,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008047495] [2023-08-31 22:26:22,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:26:22,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-08-31 22:26:22,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:26:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-08-31 22:26:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=4750, Unknown=18, NotChecked=0, Total=5112 [2023-08-31 22:26:22,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 327 [2023-08-31 22:26:22,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 1993 transitions, 31322 flow. Second operand has 72 states, 72 states have (on average 82.5) internal successors, (5940), 72 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:26:22,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:26:22,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 327 [2023-08-31 22:26:22,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:27:02,735 INFO L130 PetriNetUnfolder]: 28052/55651 cut-off events. [2023-08-31 22:27:02,735 INFO L131 PetriNetUnfolder]: For 695313/695313 co-relation queries the response was YES. [2023-08-31 22:27:04,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411383 conditions, 55651 events. 28052/55651 cut-off events. For 695313/695313 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 505617 event pairs, 8506 based on Foata normal form. 465/55380 useless extension candidates. Maximal degree in co-relation 411241. Up to 31532 conditions per place. [2023-08-31 22:27:04,842 INFO L137 encePairwiseOnDemand]: 307/327 looper letters, 1242 selfloop transitions, 811 changer transitions 82/2135 dead transitions. [2023-08-31 22:27:04,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 2135 transitions, 36820 flow [2023-08-31 22:27:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 22:27:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 22:27:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5555 transitions. [2023-08-31 22:27:04,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26543386850152906 [2023-08-31 22:27:04,848 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5555 transitions. [2023-08-31 22:27:04,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5555 transitions. [2023-08-31 22:27:04,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:27:04,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5555 transitions. [2023-08-31 22:27:04,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 86.796875) internal successors, (5555), 64 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:04,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 327.0) internal successors, (21255), 65 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:04,864 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 327.0) internal successors, (21255), 65 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:04,864 INFO L175 Difference]: Start difference. First operand has 693 places, 1993 transitions, 31322 flow. Second operand 64 states and 5555 transitions. [2023-08-31 22:27:04,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 2135 transitions, 36820 flow [2023-08-31 22:27:11,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 2135 transitions, 35857 flow, removed 169 selfloop flow, removed 33 redundant places. [2023-08-31 22:27:11,681 INFO L231 Difference]: Finished difference. Result has 726 places, 1884 transitions, 31710 flow [2023-08-31 22:27:11,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=26805, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=31710, PETRI_PLACES=726, PETRI_TRANSITIONS=1884} [2023-08-31 22:27:11,683 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 678 predicate places. [2023-08-31 22:27:11,683 INFO L495 AbstractCegarLoop]: Abstraction has has 726 places, 1884 transitions, 31710 flow [2023-08-31 22:27:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 82.5) internal successors, (5940), 72 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:11,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:27:11,684 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:27:11,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 22:27:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:27:11,885 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:27:11,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:27:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash -956500555, now seen corresponding path program 2 times [2023-08-31 22:27:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:27:11,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719473575] [2023-08-31 22:27:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:27:11,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:27:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:27:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:27:12,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:27:12,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719473575] [2023-08-31 22:27:12,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719473575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:27:12,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874572852] [2023-08-31 22:27:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 22:27:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:27:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:27:12,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:27:12,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 22:27:12,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 22:27:12,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:27:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 22:27:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:27:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:27:12,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:27:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 22:27:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874572852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:27:12,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:27:12,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-08-31 22:27:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75793443] [2023-08-31 22:27:12,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:27:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 22:27:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:27:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 22:27:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-31 22:27:12,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-31 22:27:12,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 1884 transitions, 31710 flow. Second operand has 22 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:12,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:27:12,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-31 22:27:12,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:27:42,228 INFO L130 PetriNetUnfolder]: 30232/59901 cut-off events. [2023-08-31 22:27:42,229 INFO L131 PetriNetUnfolder]: For 837133/837133 co-relation queries the response was YES. [2023-08-31 22:27:44,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461003 conditions, 59901 events. 30232/59901 cut-off events. For 837133/837133 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 543049 event pairs, 7731 based on Foata normal form. 260/59539 useless extension candidates. Maximal degree in co-relation 460847. Up to 26589 conditions per place. [2023-08-31 22:27:44,535 INFO L137 encePairwiseOnDemand]: 316/327 looper letters, 1449 selfloop transitions, 1075 changer transitions 9/2533 dead transitions. [2023-08-31 22:27:44,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 2533 transitions, 46685 flow [2023-08-31 22:27:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 22:27:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 22:27:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3972 transitions. [2023-08-31 22:27:44,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44988107373428476 [2023-08-31 22:27:44,539 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3972 transitions. [2023-08-31 22:27:44,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3972 transitions. [2023-08-31 22:27:44,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:27:44,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3972 transitions. [2023-08-31 22:27:44,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 147.11111111111111) internal successors, (3972), 27 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:44,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:44,547 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 327.0) internal successors, (9156), 28 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:44,547 INFO L175 Difference]: Start difference. First operand has 726 places, 1884 transitions, 31710 flow. Second operand 27 states and 3972 transitions. [2023-08-31 22:27:44,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 2533 transitions, 46685 flow [2023-08-31 22:27:52,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 2533 transitions, 44850 flow, removed 234 selfloop flow, removed 46 redundant places. [2023-08-31 22:27:52,519 INFO L231 Difference]: Finished difference. Result has 705 places, 1964 transitions, 35290 flow [2023-08-31 22:27:52,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=28884, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=35290, PETRI_PLACES=705, PETRI_TRANSITIONS=1964} [2023-08-31 22:27:52,521 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 657 predicate places. [2023-08-31 22:27:52,521 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 1964 transitions, 35290 flow [2023-08-31 22:27:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 142.04545454545453) internal successors, (3125), 22 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:27:52,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:27:52,522 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:27:52,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 22:27:52,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-31 22:27:52,722 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:27:52,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:27:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2073502669, now seen corresponding path program 5 times [2023-08-31 22:27:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:27:52,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651780086] [2023-08-31 22:27:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:27:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:27:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:27:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:27:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:27:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651780086] [2023-08-31 22:27:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651780086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:27:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812507220] [2023-08-31 22:27:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 22:27:53,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:27:53,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:27:54,000 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:27:54,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 22:27:54,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 22:27:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:27:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-31 22:27:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:27:54,163 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:27:54,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-31 22:27:54,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 22:27:54,568 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-31 22:27:54,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2023-08-31 22:27:55,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 22:27:55,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 48 [2023-08-31 22:27:56,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-31 22:27:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:27:56,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:27:57,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:27:57,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-31 22:27:57,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:27:57,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-31 22:27:57,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-31 22:27:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:27:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812507220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:27:58,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:27:58,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 77 [2023-08-31 22:27:58,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104093442] [2023-08-31 22:27:58,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:27:58,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-08-31 22:27:58,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:27:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-08-31 22:27:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5865, Unknown=0, NotChecked=0, Total=6162 [2023-08-31 22:28:08,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:28:12,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:28:28,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:28:30,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:28:30,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 327 [2023-08-31 22:28:30,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 1964 transitions, 35290 flow. Second operand has 79 states, 79 states have (on average 112.63291139240506) internal successors, (8898), 79 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:28:30,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:28:30,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 327 [2023-08-31 22:28:30,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:28:41,597 WARN L222 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 139 DAG size of output: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 22:28:54,497 WARN L222 SmtUtils]: Spent 10.39s on a formula simplification. DAG size of input: 129 DAG size of output: 125 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 22:29:15,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 22:29:19,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 22:29:29,907 WARN L222 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 116 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 22:30:41,276 INFO L130 PetriNetUnfolder]: 39699/78417 cut-off events. [2023-08-31 22:30:41,277 INFO L131 PetriNetUnfolder]: For 1077232/1077232 co-relation queries the response was YES. [2023-08-31 22:30:44,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607656 conditions, 78417 events. 39699/78417 cut-off events. For 1077232/1077232 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 737538 event pairs, 10288 based on Foata normal form. 144/77821 useless extension candidates. Maximal degree in co-relation 607502. Up to 36676 conditions per place. [2023-08-31 22:30:44,348 INFO L137 encePairwiseOnDemand]: 306/327 looper letters, 1967 selfloop transitions, 1263 changer transitions 63/3293 dead transitions. [2023-08-31 22:30:44,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 847 places, 3293 transitions, 60690 flow [2023-08-31 22:30:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-08-31 22:30:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2023-08-31 22:30:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 16688 transitions. [2023-08-31 22:30:44,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568785954107055 [2023-08-31 22:30:44,358 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 16688 transitions. [2023-08-31 22:30:44,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 16688 transitions. [2023-08-31 22:30:44,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:30:44,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 16688 transitions. [2023-08-31 22:30:44,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 116.6993006993007) internal successors, (16688), 143 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:30:44,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 327.0) internal successors, (47088), 144 states have internal predecessors, (47088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:30:44,412 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 327.0) internal successors, (47088), 144 states have internal predecessors, (47088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:30:44,413 INFO L175 Difference]: Start difference. First operand has 705 places, 1964 transitions, 35290 flow. Second operand 143 states and 16688 transitions. [2023-08-31 22:30:44,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 847 places, 3293 transitions, 60690 flow [2023-08-31 22:30:58,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 3293 transitions, 58906 flow, removed 361 selfloop flow, removed 12 redundant places. [2023-08-31 22:30:58,992 INFO L231 Difference]: Finished difference. Result has 915 places, 2603 transitions, 49793 flow [2023-08-31 22:30:58,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=34048, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=700, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=49793, PETRI_PLACES=915, PETRI_TRANSITIONS=2603} [2023-08-31 22:30:58,994 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 867 predicate places. [2023-08-31 22:30:58,994 INFO L495 AbstractCegarLoop]: Abstraction has has 915 places, 2603 transitions, 49793 flow [2023-08-31 22:30:58,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 112.63291139240506) internal successors, (8898), 79 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:30:58,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:30:58,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:30:59,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-31 22:30:59,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:30:59,202 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-31 22:30:59,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:30:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash -86159361, now seen corresponding path program 6 times [2023-08-31 22:30:59,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:30:59,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136852768] [2023-08-31 22:30:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:30:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:30:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:31:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:31:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:31:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136852768] [2023-08-31 22:31:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136852768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:31:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893153008] [2023-08-31 22:31:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 22:31:00,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:31:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:31:00,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:31:00,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 22:31:00,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 22:31:00,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 22:31:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-31 22:31:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:31:00,670 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 22:31:00,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-31 22:31:01,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 22:31:01,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-31 22:31:01,581 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-08-31 22:31:01,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2023-08-31 22:31:02,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2023-08-31 22:31:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:31:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:31:03,047 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (not (= 4294967294 (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312))) (store .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) |c_t1Thread1of1ForFork1_push_~x#1|))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-31 22:31:05,405 WARN L839 $PredicateComparison]: unable to prove that (forall ((|aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| Int) (v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (or (< |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 0) (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312) |c_~#arr~0.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) (mod |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 4294967296)) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset|)) 4294967296))) (<= 400 |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53|))) is different from false [2023-08-31 22:31:05,422 WARN L839 $PredicateComparison]: unable to prove that (forall ((|aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| Int) (v_ArrVal_1312 (Array Int Int)) (|t1Thread1of1ForFork1_push_~stack#1.offset| Int) (|t1Thread1of1ForFork1_push_#t~ret34#1| Int)) (or (< |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 0) (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1312) |c_~#arr~0.base|) (+ |t1Thread1of1ForFork1_push_~stack#1.offset| (* |t1Thread1of1ForFork1_push_#t~ret34#1| 4)) (mod |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53| 4294967296)) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296))) (<= 400 |aux_mod_v_t1Thread1of1ForFork1_~tmp~0#1_87_53|))) is different from false [2023-08-31 22:31:05,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:31:05,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-08-31 22:31:05,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:31:05,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2023-08-31 22:31:05,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2023-08-31 22:31:05,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-31 22:31:05,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 22:31:05,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 111 [2023-08-31 22:31:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 17 refuted. 4 times theorem prover too weak. 1 trivial. 4 not checked. [2023-08-31 22:31:07,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893153008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:31:07,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:31:07,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 65 [2023-08-31 22:31:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948576500] [2023-08-31 22:31:07,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:31:07,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-08-31 22:31:07,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:31:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-08-31 22:31:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3798, Unknown=28, NotChecked=378, Total=4422 [2023-08-31 22:31:08,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 327 [2023-08-31 22:31:08,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 915 places, 2603 transitions, 49793 flow. Second operand has 67 states, 67 states have (on average 88.92537313432835) internal successors, (5958), 67 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 22:31:08,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:31:08,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 327 [2023-08-31 22:31:08,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:31:14,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15