./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c -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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:07:50,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:07:50,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:07:50,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:07:50,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:07:50,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:07:50,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:07:50,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:07:50,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:07:50,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:07:50,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:07:50,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:07:50,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:07:50,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:07:50,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:07:50,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:07:50,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:07:50,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:07:50,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:07:50,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:07:50,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:07:50,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:07:50,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:07:50,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:07:50,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:07:50,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:07:50,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:07:50,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:07:50,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:07:50,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:07:50,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:07:50,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:07:50,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:07:50,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:07:50,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:07:50,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:07:50,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:07:50,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:07:50,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:07:50,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:07:50,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:07:50,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:07:50,159 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:07:50,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:07:50,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:07:50,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:07:50,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:07:50,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:07:50,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:07:50,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:07:50,163 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:07:50,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:07:50,164 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:07:50,165 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:07:50,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:07:50,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:07:50,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:07:50,165 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:07:50,166 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:07:50,166 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:07:50,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:07:50,166 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:07:50,166 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:07:50,167 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:07:50,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:07:50,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:07:50,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:07:50,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:07:50,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:07:50,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:07:50,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:07:50,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:07:50,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:07:50,169 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:07:50,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:07:50,169 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:07:50,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:07:50,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:07:50,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:07:50,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:07:50,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:07:50,527 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:07:50,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-29 23:07:51,810 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:07:51,991 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:07:51,992 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-29 23:07:51,999 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e18f472bc/a9d21181149f41f18bd20fc44ca44092/FLAG6c27a9b59 [2023-08-29 23:07:52,012 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e18f472bc/a9d21181149f41f18bd20fc44ca44092 [2023-08-29 23:07:52,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:07:52,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:07:52,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:07:52,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:07:52,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:07:52,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d922d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52, skipping insertion in model container [2023-08-29 23:07:52,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:07:52,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:07:52,222 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2023-08-29 23:07:52,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:07:52,237 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:07:52,270 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2023-08-29 23:07:52,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:07:52,285 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:07:52,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52 WrapperNode [2023-08-29 23:07:52,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:07:52,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:07:52,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:07:52,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:07:52,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,325 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 169 [2023-08-29 23:07:52,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:07:52,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:07:52,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:07:52,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:07:52,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:07:52,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:07:52,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:07:52,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:07:52,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (1/1) ... [2023-08-29 23:07:52,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:07:52,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:07:52,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:07:52,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:07:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:07:52,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:07:52,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:07:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:07:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:07:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:07:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:07:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:07:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:07:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:07:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:07:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:07:52,436 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:07:52,573 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:07:52,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:07:52,884 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:07:52,892 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:07:52,892 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 23:07:52,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:07:52 BoogieIcfgContainer [2023-08-29 23:07:52,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:07:52,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:07:52,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:07:52,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:07:52,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:07:52" (1/3) ... [2023-08-29 23:07:52,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd6db99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:07:52, skipping insertion in model container [2023-08-29 23:07:52,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:07:52" (2/3) ... [2023-08-29 23:07:52,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd6db99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:07:52, skipping insertion in model container [2023-08-29 23:07:52,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:07:52" (3/3) ... [2023-08-29 23:07:52,902 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-08-29 23:07:52,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:07:52,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-29 23:07:52,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:07:53,027 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:07:53,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 208 transitions, 432 flow [2023-08-29 23:07:53,173 INFO L130 PetriNetUnfolder]: 14/206 cut-off events. [2023-08-29 23:07:53,173 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:07:53,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 206 events. 14/206 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 351 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-29 23:07:53,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 208 transitions, 432 flow [2023-08-29 23:07:53,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 202 transitions, 416 flow [2023-08-29 23:07:53,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:07:53,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 202 transitions, 416 flow [2023-08-29 23:07:53,210 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 202 transitions, 416 flow [2023-08-29 23:07:53,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 202 transitions, 416 flow [2023-08-29 23:07:53,281 INFO L130 PetriNetUnfolder]: 14/202 cut-off events. [2023-08-29 23:07:53,282 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:07:53,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 202 events. 14/202 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 330 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-29 23:07:53,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-29 23:07:59,692 INFO L134 LiptonReduction]: Checked pairs total: 7464 [2023-08-29 23:07:59,692 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-29 23:07:59,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:07:59,709 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;@32f1cbe6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:07:59,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 23:07:59,711 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:07:59,711 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:07:59,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:59,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:07:59,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:59,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 849, now seen corresponding path program 1 times [2023-08-29 23:07:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:59,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726438997] [2023-08-29 23:07:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:59,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:07:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:07:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:07:59,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726438997] [2023-08-29 23:07:59,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726438997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:07:59,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:07:59,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:07:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755771974] [2023-08-29 23:07:59,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:07:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:07:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:07:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:07:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:07:59,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-29 23:07:59,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:59,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:07:59,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-29 23:07:59,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:07:59,883 INFO L130 PetriNetUnfolder]: 106/169 cut-off events. [2023-08-29 23:07:59,884 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 23:07:59,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 548 event pairs, 45 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-08-29 23:07:59,886 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-29 23:07:59,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-29 23:07:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:07:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:07:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 404 transitions. [2023-08-29 23:07:59,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611872146118721 [2023-08-29 23:07:59,899 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 404 transitions. [2023-08-29 23:07:59,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 404 transitions. [2023-08-29 23:07:59,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:07:59,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 404 transitions. [2023-08-29 23:07:59,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.0) internal successors, (404), 2 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:59,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:59,910 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:59,912 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 404 transitions. [2023-08-29 23:07:59,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-29 23:07:59,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:07:59,915 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-29 23:07:59,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-29 23:07:59,920 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-29 23:07:59,920 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-29 23:07:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:07:59,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:07:59,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:07:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:07:59,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:07:59,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:07:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash 835753, now seen corresponding path program 1 times [2023-08-29 23:07:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:07:59,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642915442] [2023-08-29 23:07:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:07:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:07:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642915442] [2023-08-29 23:08:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642915442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:00,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:08:00,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397312907] [2023-08-29 23:08:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:00,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:08:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:08:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:08:00,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 438 [2023-08-29 23:08:00,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:00,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 438 [2023-08-29 23:08:00,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:00,229 INFO L130 PetriNetUnfolder]: 99/156 cut-off events. [2023-08-29 23:08:00,230 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:08:00,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 491 event pairs, 42 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-08-29 23:08:00,231 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 23:08:00,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-29 23:08:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:08:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:08:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2023-08-29 23:08:00,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299847792998478 [2023-08-29 23:08:00,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2023-08-29 23:08:00,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2023-08-29 23:08:00,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:00,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2023-08-29 23:08:00,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,241 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 565 transitions. [2023-08-29 23:08:00,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-29 23:08:00,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:08:00,242 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-29 23:08:00,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-29 23:08:00,243 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-29 23:08:00,243 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-29 23:08:00,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:00,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:08:00,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:08:00,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:00,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash 835754, now seen corresponding path program 1 times [2023-08-29 23:08:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:00,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126306416] [2023-08-29 23:08:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:00,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126306416] [2023-08-29 23:08:00,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126306416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:00,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:00,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:08:00,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427737795] [2023-08-29 23:08:00,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:00,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:08:00,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:08:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:08:00,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 438 [2023-08-29 23:08:00,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:00,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 438 [2023-08-29 23:08:00,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:00,430 INFO L130 PetriNetUnfolder]: 92/143 cut-off events. [2023-08-29 23:08:00,431 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:08:00,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 425 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-08-29 23:08:00,432 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 23:08:00,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-29 23:08:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:08:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:08:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-29 23:08:00,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375951293759513 [2023-08-29 23:08:00,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-29 23:08:00,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-29 23:08:00,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:00,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-29 23:08:00,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,440 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 575 transitions. [2023-08-29 23:08:00,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-29 23:08:00,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:00,441 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-29 23:08:00,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-29 23:08:00,442 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-29 23:08:00,442 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-29 23:08:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:00,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:08:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:08:00,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:00,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 803179486, now seen corresponding path program 1 times [2023-08-29 23:08:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:00,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120902779] [2023-08-29 23:08:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:00,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120902779] [2023-08-29 23:08:00,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120902779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:00,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:00,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:08:00,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880832745] [2023-08-29 23:08:00,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:00,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:08:00,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:08:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:08:00,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 438 [2023-08-29 23:08:00,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 185.25) internal successors, (741), 4 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) [2023-08-29 23:08:00,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:00,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 438 [2023-08-29 23:08:00,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:00,690 INFO L130 PetriNetUnfolder]: 70/112 cut-off events. [2023-08-29 23:08:00,691 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:08:00,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 306 event pairs, 29 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-08-29 23:08:00,692 INFO L137 encePairwiseOnDemand]: 436/438 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-29 23:08:00,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-29 23:08:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:08:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:08:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-08-29 23:08:00,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315068493150685 [2023-08-29 23:08:00,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-08-29 23:08:00,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-08-29 23:08:00,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:00,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-08-29 23:08:00,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,706 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 567 transitions. [2023-08-29 23:08:00,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-29 23:08:00,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:00,708 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-29 23:08:00,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-29 23:08:00,709 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-29 23:08:00,709 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-29 23:08:00,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.25) internal successors, (741), 4 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) [2023-08-29 23:08:00,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:00,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:08:00,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:08:00,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:00,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 803179485, now seen corresponding path program 1 times [2023-08-29 23:08:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:00,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149017802] [2023-08-29 23:08:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:00,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149017802] [2023-08-29 23:08:00,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149017802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:00,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:00,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:08:00,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784581684] [2023-08-29 23:08:00,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:08:00,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:08:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:08:00,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 438 [2023-08-29 23:08:00,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:00,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 438 [2023-08-29 23:08:00,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:00,905 INFO L130 PetriNetUnfolder]: 48/81 cut-off events. [2023-08-29 23:08:00,905 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:08:00,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 186 event pairs, 19 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-08-29 23:08:00,906 INFO L137 encePairwiseOnDemand]: 436/438 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-29 23:08:00,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-29 23:08:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:08:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:08:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2023-08-29 23:08:00,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170471841704718 [2023-08-29 23:08:00,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2023-08-29 23:08:00,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2023-08-29 23:08:00,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:00,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2023-08-29 23:08:00,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,914 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 548 transitions. [2023-08-29 23:08:00,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-29 23:08:00,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:00,915 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-29 23:08:00,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-29 23:08:00,918 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-29 23:08:00,919 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-29 23:08:00,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:00,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:00,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:00,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:08:00,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:00,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2033414492, now seen corresponding path program 1 times [2023-08-29 23:08:00,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:00,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904104889] [2023-08-29 23:08:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:00,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904104889] [2023-08-29 23:08:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904104889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:08:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901023025] [2023-08-29 23:08:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:01,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 438 [2023-08-29 23:08:01,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:01,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 438 [2023-08-29 23:08:01,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:01,431 INFO L130 PetriNetUnfolder]: 64/118 cut-off events. [2023-08-29 23:08:01,431 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:08:01,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 118 events. 64/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 1 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 243. Up to 85 conditions per place. [2023-08-29 23:08:01,432 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-08-29 23:08:01,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 35 transitions, 151 flow [2023-08-29 23:08:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 929 transitions. [2023-08-29 23:08:01,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420091324200915 [2023-08-29 23:08:01,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 929 transitions. [2023-08-29 23:08:01,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 929 transitions. [2023-08-29 23:08:01,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:01,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 929 transitions. [2023-08-29 23:08:01,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,443 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 5 states and 929 transitions. [2023-08-29 23:08:01,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 35 transitions, 151 flow [2023-08-29 23:08:01,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 35 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:01,444 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 72 flow [2023-08-29 23:08:01,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-29 23:08:01,447 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-29 23:08:01,447 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 72 flow [2023-08-29 23:08:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:01,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:01,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:08:01,450 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:01,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:01,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1250727870, now seen corresponding path program 2 times [2023-08-29 23:08:01,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:01,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905716637] [2023-08-29 23:08:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:01,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:01,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905716637] [2023-08-29 23:08:01,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905716637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:01,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:01,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:08:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136354567] [2023-08-29 23:08:01,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:01,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:01,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:01,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:01,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 438 [2023-08-29 23:08:01,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:01,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 438 [2023-08-29 23:08:01,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:01,780 INFO L130 PetriNetUnfolder]: 61/110 cut-off events. [2023-08-29 23:08:01,780 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 23:08:01,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 110 events. 61/110 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 286 event pairs, 7 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 318. Up to 85 conditions per place. [2023-08-29 23:08:01,781 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 19 selfloop transitions, 6 changer transitions 5/32 dead transitions. [2023-08-29 23:08:01,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 171 flow [2023-08-29 23:08:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 925 transitions. [2023-08-29 23:08:01,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223744292237443 [2023-08-29 23:08:01,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 925 transitions. [2023-08-29 23:08:01,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 925 transitions. [2023-08-29 23:08:01,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:01,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 925 transitions. [2023-08-29 23:08:01,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,790 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,790 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 72 flow. Second operand 5 states and 925 transitions. [2023-08-29 23:08:01,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 171 flow [2023-08-29 23:08:01,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:01,792 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 104 flow [2023-08-29 23:08:01,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2023-08-29 23:08:01,792 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-08-29 23:08:01,793 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 104 flow [2023-08-29 23:08:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:01,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:01,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:01,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:08:01,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:01,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash -354825092, now seen corresponding path program 1 times [2023-08-29 23:08:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:01,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179691467] [2023-08-29 23:08:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:01,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179691467] [2023-08-29 23:08:01,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179691467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:01,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902443813] [2023-08-29 23:08:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:01,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:01,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:01,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 23:08:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:02,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902443813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:02,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:02,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-29 23:08:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955209563] [2023-08-29 23:08:02,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:08:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:08:02,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:08:02,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:02,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:02,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:02,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:02,227 INFO L130 PetriNetUnfolder]: 93/168 cut-off events. [2023-08-29 23:08:02,227 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-29 23:08:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 168 events. 93/168 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 499 event pairs, 12 based on Foata normal form. 6/160 useless extension candidates. Maximal degree in co-relation 520. Up to 71 conditions per place. [2023-08-29 23:08:02,228 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 41 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-08-29 23:08:02,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 291 flow [2023-08-29 23:08:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 945 transitions. [2023-08-29 23:08:02,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315068493150685 [2023-08-29 23:08:02,232 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 945 transitions. [2023-08-29 23:08:02,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 945 transitions. [2023-08-29 23:08:02,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:02,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 945 transitions. [2023-08-29 23:08:02,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,238 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,238 INFO L175 Difference]: Start difference. First operand has 33 places, 21 transitions, 104 flow. Second operand 5 states and 945 transitions. [2023-08-29 23:08:02,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 291 flow [2023-08-29 23:08:02,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 275 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:02,241 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 136 flow [2023-08-29 23:08:02,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-08-29 23:08:02,242 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-08-29 23:08:02,242 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 136 flow [2023-08-29 23:08:02,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:02,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:02,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:02,448 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:02,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 562130681, now seen corresponding path program 1 times [2023-08-29 23:08:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045414494] [2023-08-29 23:08:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045414494] [2023-08-29 23:08:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045414494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:02,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:02,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:08:02,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597532714] [2023-08-29 23:08:02,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:02,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:02,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 438 [2023-08-29 23:08:02,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:02,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 438 [2023-08-29 23:08:02,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:02,608 INFO L130 PetriNetUnfolder]: 114/211 cut-off events. [2023-08-29 23:08:02,608 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2023-08-29 23:08:02,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 211 events. 114/211 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 666 event pairs, 38 based on Foata normal form. 6/217 useless extension candidates. Maximal degree in co-relation 744. Up to 134 conditions per place. [2023-08-29 23:08:02,610 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 33 selfloop transitions, 11 changer transitions 6/50 dead transitions. [2023-08-29 23:08:02,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 359 flow [2023-08-29 23:08:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:08:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:08:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1133 transitions. [2023-08-29 23:08:02,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311263318112633 [2023-08-29 23:08:02,614 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1133 transitions. [2023-08-29 23:08:02,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1133 transitions. [2023-08-29 23:08:02,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:02,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1133 transitions. [2023-08-29 23:08:02,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.83333333333334) internal successors, (1133), 6 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,634 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 136 flow. Second operand 6 states and 1133 transitions. [2023-08-29 23:08:02,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 359 flow [2023-08-29 23:08:02,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:08:02,637 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-08-29 23:08:02,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-08-29 23:08:02,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-29 23:08:02,639 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-08-29 23:08:02,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:02,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:02,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:08:02,640 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:02,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -39738501, now seen corresponding path program 2 times [2023-08-29 23:08:02,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:02,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837229101] [2023-08-29 23:08:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:02,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:02,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837229101] [2023-08-29 23:08:02,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837229101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:02,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:02,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:08:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452635603] [2023-08-29 23:08:02,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:02,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:02,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:02,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 438 [2023-08-29 23:08:02,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:02,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 438 [2023-08-29 23:08:02,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:02,795 INFO L130 PetriNetUnfolder]: 109/204 cut-off events. [2023-08-29 23:08:02,795 INFO L131 PetriNetUnfolder]: For 506/506 co-relation queries the response was YES. [2023-08-29 23:08:02,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 204 events. 109/204 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 40 based on Foata normal form. 4/208 useless extension candidates. Maximal degree in co-relation 848. Up to 130 conditions per place. [2023-08-29 23:08:02,797 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 36 selfloop transitions, 8 changer transitions 7/51 dead transitions. [2023-08-29 23:08:02,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 421 flow [2023-08-29 23:08:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 952 transitions. [2023-08-29 23:08:02,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434703196347032 [2023-08-29 23:08:02,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 952 transitions. [2023-08-29 23:08:02,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 952 transitions. [2023-08-29 23:08:02,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:02,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 952 transitions. [2023-08-29 23:08:02,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,806 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 5 states and 952 transitions. [2023-08-29 23:08:02,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 421 flow [2023-08-29 23:08:02,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 385 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:02,810 INFO L231 Difference]: Finished difference. Result has 49 places, 30 transitions, 229 flow [2023-08-29 23:08:02,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=49, PETRI_TRANSITIONS=30} [2023-08-29 23:08:02,811 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-08-29 23:08:02,811 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 30 transitions, 229 flow [2023-08-29 23:08:02,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:02,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:02,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:02,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:08:02,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:02,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1069729318, now seen corresponding path program 2 times [2023-08-29 23:08:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:02,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469215398] [2023-08-29 23:08:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469215398] [2023-08-29 23:08:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469215398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998319418] [2023-08-29 23:08:02,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:02,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:02,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 23:08:02,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:02,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:02,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:03,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998319418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:03,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:03,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 23:08:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115414151] [2023-08-29 23:08:03,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:08:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:08:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:08:03,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:03,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 30 transitions, 229 flow. Second operand has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:03,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:03,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:03,224 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2023-08-29 23:08:03,225 INFO L131 PetriNetUnfolder]: For 624/624 co-relation queries the response was YES. [2023-08-29 23:08:03,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 235 events. 124/235 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 807 event pairs, 16 based on Foata normal form. 6/241 useless extension candidates. Maximal degree in co-relation 960. Up to 104 conditions per place. [2023-08-29 23:08:03,227 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2023-08-29 23:08:03,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 71 transitions, 557 flow [2023-08-29 23:08:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:08:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:08:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1509 transitions. [2023-08-29 23:08:03,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306506849315068 [2023-08-29 23:08:03,231 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1509 transitions. [2023-08-29 23:08:03,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1509 transitions. [2023-08-29 23:08:03,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:03,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1509 transitions. [2023-08-29 23:08:03,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,241 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,241 INFO L175 Difference]: Start difference. First operand has 49 places, 30 transitions, 229 flow. Second operand 8 states and 1509 transitions. [2023-08-29 23:08:03,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 71 transitions, 557 flow [2023-08-29 23:08:03,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 533 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-29 23:08:03,246 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 313 flow [2023-08-29 23:08:03,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2023-08-29 23:08:03,246 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-08-29 23:08:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 313 flow [2023-08-29 23:08:03,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:03,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:03,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:03,457 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,SelfDestructingSolverStorable10 [2023-08-29 23:08:03,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:03,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1574503695, now seen corresponding path program 3 times [2023-08-29 23:08:03,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:03,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330424152] [2023-08-29 23:08:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:03,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:03,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330424152] [2023-08-29 23:08:03,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330424152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060582856] [2023-08-29 23:08:03,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:03,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:03,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:03,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:03,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 23:08:03,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:08:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:03,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:03,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:03,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060582856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:03,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:03,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-29 23:08:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553734790] [2023-08-29 23:08:03,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:03,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:08:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:08:03,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:08:03,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:03,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:03,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:03,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:03,797 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2023-08-29 23:08:03,797 INFO L131 PetriNetUnfolder]: For 852/852 co-relation queries the response was YES. [2023-08-29 23:08:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 245 events. 130/245 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 839 event pairs, 16 based on Foata normal form. 4/249 useless extension candidates. Maximal degree in co-relation 1096. Up to 104 conditions per place. [2023-08-29 23:08:03,799 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2023-08-29 23:08:03,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 518 flow [2023-08-29 23:08:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 941 transitions. [2023-08-29 23:08:03,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42968036529680365 [2023-08-29 23:08:03,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 941 transitions. [2023-08-29 23:08:03,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 941 transitions. [2023-08-29 23:08:03,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:03,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 941 transitions. [2023-08-29 23:08:03,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.2) internal successors, (941), 5 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,807 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,808 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 313 flow. Second operand 5 states and 941 transitions. [2023-08-29 23:08:03,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 518 flow [2023-08-29 23:08:03,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 495 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 23:08:03,812 INFO L231 Difference]: Finished difference. Result has 59 places, 38 transitions, 356 flow [2023-08-29 23:08:03,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=59, PETRI_TRANSITIONS=38} [2023-08-29 23:08:03,813 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-08-29 23:08:03,813 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 38 transitions, 356 flow [2023-08-29 23:08:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.625) internal successors, (1469), 8 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:03,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:03,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:03,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:04,019 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:04,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash -97791812, now seen corresponding path program 3 times [2023-08-29 23:08:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:04,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568020989] [2023-08-29 23:08:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568020989] [2023-08-29 23:08:04,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568020989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:08:04,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:08:04,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:08:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538515876] [2023-08-29 23:08:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:08:04,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:08:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:08:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:08:04,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 438 [2023-08-29 23:08:04,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 38 transitions, 356 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:04,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 438 [2023-08-29 23:08:04,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:04,202 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2023-08-29 23:08:04,202 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2023-08-29 23:08:04,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 229 events. 122/229 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 766 event pairs, 40 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 1038. Up to 160 conditions per place. [2023-08-29 23:08:04,204 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2023-08-29 23:08:04,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 524 flow [2023-08-29 23:08:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:08:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:08:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1134 transitions. [2023-08-29 23:08:04,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315068493150685 [2023-08-29 23:08:04,208 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1134 transitions. [2023-08-29 23:08:04,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1134 transitions. [2023-08-29 23:08:04,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:04,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1134 transitions. [2023-08-29 23:08:04,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,214 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,214 INFO L175 Difference]: Start difference. First operand has 59 places, 38 transitions, 356 flow. Second operand 6 states and 1134 transitions. [2023-08-29 23:08:04,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 524 flow [2023-08-29 23:08:04,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 507 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:04,220 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 308 flow [2023-08-29 23:08:04,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2023-08-29 23:08:04,221 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2023-08-29 23:08:04,221 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 308 flow [2023-08-29 23:08:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:04,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:04,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 23:08:04,223 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:04,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:04,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1147575501, now seen corresponding path program 4 times [2023-08-29 23:08:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107021784] [2023-08-29 23:08:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:04,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107021784] [2023-08-29 23:08:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107021784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549568719] [2023-08-29 23:08:04,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:04,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:04,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:04,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 23:08:04,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:04,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549568719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:04,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:04,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 23:08:04,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125610248] [2023-08-29 23:08:04,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:08:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:08:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:08:04,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:04,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 308 flow. Second operand has 10 states, 10 states have (on average 183.3) internal successors, (1833), 10 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:04,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:04,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:04,589 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2023-08-29 23:08:04,590 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2023-08-29 23:08:04,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 219 events. 122/219 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 43 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 1009. Up to 161 conditions per place. [2023-08-29 23:08:04,592 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-08-29 23:08:04,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 462 flow [2023-08-29 23:08:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 940 transitions. [2023-08-29 23:08:04,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292237442922374 [2023-08-29 23:08:04,595 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 940 transitions. [2023-08-29 23:08:04,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 940 transitions. [2023-08-29 23:08:04,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:04,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 940 transitions. [2023-08-29 23:08:04,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,600 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 308 flow. Second operand 5 states and 940 transitions. [2023-08-29 23:08:04,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 462 flow [2023-08-29 23:08:04,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 413 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:04,605 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 298 flow [2023-08-29 23:08:04,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2023-08-29 23:08:04,605 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-08-29 23:08:04,605 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 298 flow [2023-08-29 23:08:04,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.3) internal successors, (1833), 10 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:04,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:04,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:04,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:04,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:04,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:04,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 279076464, now seen corresponding path program 4 times [2023-08-29 23:08:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425144716] [2023-08-29 23:08:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:04,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425144716] [2023-08-29 23:08:04,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425144716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:04,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588239414] [2023-08-29 23:08:04,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:04,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:04,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:04,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:04,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 23:08:04,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588239414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:04,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 23:08:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440393711] [2023-08-29 23:08:04,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:04,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:08:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:08:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:08:05,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:05,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 298 flow. Second operand has 10 states, 10 states have (on average 183.4) internal successors, (1834), 10 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:05,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:05,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:05,125 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2023-08-29 23:08:05,125 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-08-29 23:08:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 203 events. 114/203 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 587 event pairs, 37 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 924. Up to 153 conditions per place. [2023-08-29 23:08:05,127 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-08-29 23:08:05,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 421 flow [2023-08-29 23:08:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:08:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:08:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 937 transitions. [2023-08-29 23:08:05,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278538812785388 [2023-08-29 23:08:05,131 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 937 transitions. [2023-08-29 23:08:05,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 937 transitions. [2023-08-29 23:08:05,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:05,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 937 transitions. [2023-08-29 23:08:05,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,136 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,137 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 298 flow. Second operand 5 states and 937 transitions. [2023-08-29 23:08:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 421 flow [2023-08-29 23:08:05,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 45 transitions, 405 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:05,140 INFO L231 Difference]: Finished difference. Result has 58 places, 34 transitions, 295 flow [2023-08-29 23:08:05,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=34} [2023-08-29 23:08:05,141 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2023-08-29 23:08:05,141 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 34 transitions, 295 flow [2023-08-29 23:08:05,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.4) internal successors, (1834), 10 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:05,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:05,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-29 23:08:05,347 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,SelfDestructingSolverStorable14 [2023-08-29 23:08:05,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:05,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 24975495, now seen corresponding path program 5 times [2023-08-29 23:08:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:05,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501376209] [2023-08-29 23:08:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:05,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501376209] [2023-08-29 23:08:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501376209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819968438] [2023-08-29 23:08:05,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:05,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:05,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:05,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 23:08:05,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:05,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 23:08:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:05,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:05,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819968438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:05,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:05,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 23:08:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929412436] [2023-08-29 23:08:05,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:05,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:08:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:08:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:08:05,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:05,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 34 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:05,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:05,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:05,721 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2023-08-29 23:08:05,721 INFO L131 PetriNetUnfolder]: For 641/641 co-relation queries the response was YES. [2023-08-29 23:08:05,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 193 events. 110/193 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 566 event pairs, 9 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 906. Up to 86 conditions per place. [2023-08-29 23:08:05,723 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-08-29 23:08:05,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 488 flow [2023-08-29 23:08:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:08:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:08:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1492 transitions. [2023-08-29 23:08:05,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257990867579909 [2023-08-29 23:08:05,727 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1492 transitions. [2023-08-29 23:08:05,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1492 transitions. [2023-08-29 23:08:05,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:05,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1492 transitions. [2023-08-29 23:08:05,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,735 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,735 INFO L175 Difference]: Start difference. First operand has 58 places, 34 transitions, 295 flow. Second operand 8 states and 1492 transitions. [2023-08-29 23:08:05,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 488 flow [2023-08-29 23:08:05,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 440 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:05,738 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 291 flow [2023-08-29 23:08:05,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=291, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2023-08-29 23:08:05,739 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-08-29 23:08:05,739 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 291 flow [2023-08-29 23:08:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.5) internal successors, (1835), 10 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:05,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:05,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:05,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-29 23:08:05,945 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:05,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 832856233, now seen corresponding path program 1 times [2023-08-29 23:08:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703944571] [2023-08-29 23:08:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:05,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:06,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:06,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703944571] [2023-08-29 23:08:06,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703944571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587940248] [2023-08-29 23:08:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:06,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:06,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:06,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:06,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 23:08:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 23:08:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587940248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:06,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 23:08:06,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462624989] [2023-08-29 23:08:06,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:06,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:06,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 291 flow. Second operand has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:06,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:06,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:06,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:07,073 INFO L130 PetriNetUnfolder]: 133/239 cut-off events. [2023-08-29 23:08:07,074 INFO L131 PetriNetUnfolder]: For 636/660 co-relation queries the response was YES. [2023-08-29 23:08:07,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 239 events. 133/239 cut-off events. For 636/660 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 815 event pairs, 6 based on Foata normal form. 11/244 useless extension candidates. Maximal degree in co-relation 1060. Up to 168 conditions per place. [2023-08-29 23:08:07,076 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2023-08-29 23:08:07,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 533 flow [2023-08-29 23:08:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1251 transitions. [2023-08-29 23:08:07,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080234833659491 [2023-08-29 23:08:07,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1251 transitions. [2023-08-29 23:08:07,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1251 transitions. [2023-08-29 23:08:07,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:07,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1251 transitions. [2023-08-29 23:08:07,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.71428571428572) internal successors, (1251), 7 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:07,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:07,086 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:07,087 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 291 flow. Second operand 7 states and 1251 transitions. [2023-08-29 23:08:07,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 533 flow [2023-08-29 23:08:07,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 482 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-29 23:08:07,091 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 382 flow [2023-08-29 23:08:07,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-29 23:08:07,091 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-08-29 23:08:07,092 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 382 flow [2023-08-29 23:08:07,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:07,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:07,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:07,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:07,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:07,297 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:07,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 734698065, now seen corresponding path program 2 times [2023-08-29 23:08:07,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:07,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258601753] [2023-08-29 23:08:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258601753] [2023-08-29 23:08:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258601753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350584990] [2023-08-29 23:08:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:07,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:07,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:07,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:07,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 23:08:07,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:07,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 23:08:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:07,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350584990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:07,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:07,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-29 23:08:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855871878] [2023-08-29 23:08:07,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:08:07,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:08:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:08:08,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:08,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 382 flow. Second operand has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:08,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:08,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:08,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:08,344 INFO L130 PetriNetUnfolder]: 145/265 cut-off events. [2023-08-29 23:08:08,345 INFO L131 PetriNetUnfolder]: For 878/914 co-relation queries the response was YES. [2023-08-29 23:08:08,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 265 events. 145/265 cut-off events. For 878/914 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 960 event pairs, 8 based on Foata normal form. 11/270 useless extension candidates. Maximal degree in co-relation 1250. Up to 172 conditions per place. [2023-08-29 23:08:08,347 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2023-08-29 23:08:08,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 616 flow [2023-08-29 23:08:08,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1256 transitions. [2023-08-29 23:08:08,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096542726679713 [2023-08-29 23:08:08,351 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1256 transitions. [2023-08-29 23:08:08,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1256 transitions. [2023-08-29 23:08:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1256 transitions. [2023-08-29 23:08:08,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.42857142857142) internal successors, (1256), 7 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:08,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:08,358 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:08,358 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 382 flow. Second operand 7 states and 1256 transitions. [2023-08-29 23:08:08,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 616 flow [2023-08-29 23:08:08,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 583 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:08,363 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 451 flow [2023-08-29 23:08:08,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-08-29 23:08:08,364 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2023-08-29 23:08:08,364 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 451 flow [2023-08-29 23:08:08,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:08,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:08,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:08,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:08,571 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,SelfDestructingSolverStorable17 [2023-08-29 23:08:08,572 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:08,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 762403695, now seen corresponding path program 3 times [2023-08-29 23:08:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895312654] [2023-08-29 23:08:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:08,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895312654] [2023-08-29 23:08:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895312654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:08,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011633556] [2023-08-29 23:08:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:08,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:08,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 23:08:08,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:08:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 23:08:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:09,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:09,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011633556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:09,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:09,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 23:08:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517198373] [2023-08-29 23:08:09,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:09,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:09,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:09,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:09,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 451 flow. Second operand has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:09,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:09,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:09,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:09,576 INFO L130 PetriNetUnfolder]: 142/256 cut-off events. [2023-08-29 23:08:09,577 INFO L131 PetriNetUnfolder]: For 1249/1277 co-relation queries the response was YES. [2023-08-29 23:08:09,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 256 events. 142/256 cut-off events. For 1249/1277 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 912 event pairs, 8 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 1297. Up to 172 conditions per place. [2023-08-29 23:08:09,579 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2023-08-29 23:08:09,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 648 flow [2023-08-29 23:08:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1252 transitions. [2023-08-29 23:08:09,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40834964122635353 [2023-08-29 23:08:09,583 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1252 transitions. [2023-08-29 23:08:09,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1252 transitions. [2023-08-29 23:08:09,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:09,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1252 transitions. [2023-08-29 23:08:09,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.85714285714286) internal successors, (1252), 7 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:09,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:09,590 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:09,590 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 451 flow. Second operand 7 states and 1252 transitions. [2023-08-29 23:08:09,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 648 flow [2023-08-29 23:08:09,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 579 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:09,595 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 472 flow [2023-08-29 23:08:09,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-29 23:08:09,596 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-29 23:08:09,596 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 472 flow [2023-08-29 23:08:09,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.66666666666666) internal successors, (2108), 12 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:09,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:09,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:09,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:09,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:09,802 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:09,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -625469757, now seen corresponding path program 4 times [2023-08-29 23:08:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:09,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2396141] [2023-08-29 23:08:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2396141] [2023-08-29 23:08:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2396141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144600570] [2023-08-29 23:08:10,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:10,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:10,055 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:10,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 23:08:10,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:10,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 23:08:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:10,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:10,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144600570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:10,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:10,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-29 23:08:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444789377] [2023-08-29 23:08:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:10,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:08:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:08:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:08:10,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:10,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 472 flow. Second operand has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:10,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:10,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:10,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:10,717 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2023-08-29 23:08:10,717 INFO L131 PetriNetUnfolder]: For 1490/1518 co-relation queries the response was YES. [2023-08-29 23:08:10,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1560 conditions, 298 events. 166/298 cut-off events. For 1490/1518 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1121 event pairs, 10 based on Foata normal form. 9/301 useless extension candidates. Maximal degree in co-relation 1533. Up to 244 conditions per place. [2023-08-29 23:08:10,720 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2023-08-29 23:08:10,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 726 flow [2023-08-29 23:08:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1243 transitions. [2023-08-29 23:08:10,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40541422048271364 [2023-08-29 23:08:10,726 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1243 transitions. [2023-08-29 23:08:10,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1243 transitions. [2023-08-29 23:08:10,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:10,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1243 transitions. [2023-08-29 23:08:10,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.57142857142858) internal successors, (1243), 7 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:10,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:10,734 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:10,734 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 472 flow. Second operand 7 states and 1243 transitions. [2023-08-29 23:08:10,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 726 flow [2023-08-29 23:08:10,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 679 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:10,740 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 579 flow [2023-08-29 23:08:10,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2023-08-29 23:08:10,740 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2023-08-29 23:08:10,741 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 579 flow [2023-08-29 23:08:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:10,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:10,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:10,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-29 23:08:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:10,947 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:10,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2034948761, now seen corresponding path program 5 times [2023-08-29 23:08:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:10,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838311096] [2023-08-29 23:08:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838311096] [2023-08-29 23:08:11,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838311096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464687179] [2023-08-29 23:08:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:11,195 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) [2023-08-29 23:08:11,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 23:08:11,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:08:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 23:08:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:11,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464687179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:11,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-29 23:08:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640157162] [2023-08-29 23:08:11,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:11,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:08:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:08:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:08:11,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:11,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 579 flow. Second operand has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:11,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:11,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:11,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:11,884 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2023-08-29 23:08:11,884 INFO L131 PetriNetUnfolder]: For 1760/1788 co-relation queries the response was YES. [2023-08-29 23:08:11,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 326 events. 180/326 cut-off events. For 1760/1788 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1255 event pairs, 10 based on Foata normal form. 9/329 useless extension candidates. Maximal degree in co-relation 1750. Up to 248 conditions per place. [2023-08-29 23:08:11,887 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-08-29 23:08:11,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 838 flow [2023-08-29 23:08:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1250 transitions. [2023-08-29 23:08:11,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40769732550554466 [2023-08-29 23:08:11,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1250 transitions. [2023-08-29 23:08:11,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1250 transitions. [2023-08-29 23:08:11,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:11,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1250 transitions. [2023-08-29 23:08:11,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:11,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:11,905 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:11,905 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 579 flow. Second operand 7 states and 1250 transitions. [2023-08-29 23:08:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 838 flow [2023-08-29 23:08:11,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 801 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:11,915 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 656 flow [2023-08-29 23:08:11,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=656, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2023-08-29 23:08:11,915 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2023-08-29 23:08:11,916 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 656 flow [2023-08-29 23:08:11,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.42857142857142) internal successors, (2456), 14 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:11,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:11,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:11,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-29 23:08:12,121 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,SelfDestructingSolverStorable20 [2023-08-29 23:08:12,122 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:12,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -634984093, now seen corresponding path program 6 times [2023-08-29 23:08:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845999359] [2023-08-29 23:08:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:12,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:12,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845999359] [2023-08-29 23:08:12,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845999359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:12,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421355813] [2023-08-29 23:08:12,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:08:12,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:12,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:12,388 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) [2023-08-29 23:08:12,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 23:08:12,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-29 23:08:12,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 23:08:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:12,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:12,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421355813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:12,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:12,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 23:08:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022494085] [2023-08-29 23:08:12,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:12,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:12,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:12,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 656 flow. Second operand has 13 states, 13 states have (on average 175.23076923076923) internal successors, (2278), 13 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:12,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:12,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:12,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:13,092 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2023-08-29 23:08:13,092 INFO L131 PetriNetUnfolder]: For 2082/2110 co-relation queries the response was YES. [2023-08-29 23:08:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 317 events. 177/317 cut-off events. For 2082/2110 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1215 event pairs, 10 based on Foata normal form. 9/320 useless extension candidates. Maximal degree in co-relation 1781. Up to 248 conditions per place. [2023-08-29 23:08:13,095 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2023-08-29 23:08:13,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 879 flow [2023-08-29 23:08:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1248 transitions. [2023-08-29 23:08:13,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4070450097847358 [2023-08-29 23:08:13,100 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1248 transitions. [2023-08-29 23:08:13,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1248 transitions. [2023-08-29 23:08:13,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:13,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1248 transitions. [2023-08-29 23:08:13,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.28571428571428) internal successors, (1248), 7 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:13,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:13,107 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:13,107 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 656 flow. Second operand 7 states and 1248 transitions. [2023-08-29 23:08:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 879 flow [2023-08-29 23:08:13,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 801 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-29 23:08:13,117 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 678 flow [2023-08-29 23:08:13,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=678, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2023-08-29 23:08:13,117 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2023-08-29 23:08:13,118 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 678 flow [2023-08-29 23:08:13,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 175.23076923076923) internal successors, (2278), 13 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:13,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:13,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:13,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 23:08:13,324 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:13,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1081669548, now seen corresponding path program 7 times [2023-08-29 23:08:13,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:13,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944925537] [2023-08-29 23:08:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:13,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:13,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944925537] [2023-08-29 23:08:13,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944925537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:13,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805659428] [2023-08-29 23:08:13,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:08:13,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:13,401 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) [2023-08-29 23:08:13,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 23:08:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:13,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805659428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:13,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:13,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 23:08:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724473122] [2023-08-29 23:08:13,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:13,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:13,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 678 flow. Second operand has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:13,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:13,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:13,973 INFO L130 PetriNetUnfolder]: 265/498 cut-off events. [2023-08-29 23:08:13,973 INFO L131 PetriNetUnfolder]: For 3070/3070 co-relation queries the response was YES. [2023-08-29 23:08:13,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 498 events. 265/498 cut-off events. For 3070/3070 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2181 event pairs, 33 based on Foata normal form. 8/506 useless extension candidates. Maximal degree in co-relation 2691. Up to 157 conditions per place. [2023-08-29 23:08:13,978 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 98 selfloop transitions, 64 changer transitions 6/168 dead transitions. [2023-08-29 23:08:13,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 1703 flow [2023-08-29 23:08:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:08:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:08:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3362 transitions. [2023-08-29 23:08:13,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42643328259766616 [2023-08-29 23:08:13,983 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3362 transitions. [2023-08-29 23:08:13,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3362 transitions. [2023-08-29 23:08:13,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:13,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3362 transitions. [2023-08-29 23:08:13,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.77777777777777) internal successors, (3362), 18 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:13,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,000 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,000 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 678 flow. Second operand 18 states and 3362 transitions. [2023-08-29 23:08:14,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 1703 flow [2023-08-29 23:08:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 1600 flow, removed 33 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:14,015 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 1184 flow [2023-08-29 23:08:14,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1184, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2023-08-29 23:08:14,016 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-08-29 23:08:14,016 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 1184 flow [2023-08-29 23:08:14,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:14,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:14,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-29 23:08:14,221 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,SelfDestructingSolverStorable22 [2023-08-29 23:08:14,222 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:14,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -626005490, now seen corresponding path program 8 times [2023-08-29 23:08:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:14,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558112421] [2023-08-29 23:08:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:14,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558112421] [2023-08-29 23:08:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558112421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104008129] [2023-08-29 23:08:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:14,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:14,291 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) [2023-08-29 23:08:14,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 23:08:14,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:14,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:14,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:14,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:14,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104008129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:14,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:14,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-29 23:08:14,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907434300] [2023-08-29 23:08:14,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:14,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:08:14,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:08:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:08:14,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:14,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 1184 flow. Second operand has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:14,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:14,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:14,682 INFO L130 PetriNetUnfolder]: 246/457 cut-off events. [2023-08-29 23:08:14,682 INFO L131 PetriNetUnfolder]: For 3440/3440 co-relation queries the response was YES. [2023-08-29 23:08:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 457 events. 246/457 cut-off events. For 3440/3440 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1912 event pairs, 33 based on Foata normal form. 4/461 useless extension candidates. Maximal degree in co-relation 2750. Up to 133 conditions per place. [2023-08-29 23:08:14,686 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 65 selfloop transitions, 61 changer transitions 10/136 dead transitions. [2023-08-29 23:08:14,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1658 flow [2023-08-29 23:08:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:08:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:08:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2053 transitions. [2023-08-29 23:08:14,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261104192611042 [2023-08-29 23:08:14,690 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2053 transitions. [2023-08-29 23:08:14,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2053 transitions. [2023-08-29 23:08:14,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:14,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2053 transitions. [2023-08-29 23:08:14,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.63636363636363) internal successors, (2053), 11 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,698 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,698 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 1184 flow. Second operand 11 states and 2053 transitions. [2023-08-29 23:08:14,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1658 flow [2023-08-29 23:08:14,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 136 transitions, 1496 flow, removed 58 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:14,716 INFO L231 Difference]: Finished difference. Result has 112 places, 102 transitions, 1246 flow [2023-08-29 23:08:14,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1246, PETRI_PLACES=112, PETRI_TRANSITIONS=102} [2023-08-29 23:08:14,716 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2023-08-29 23:08:14,717 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 102 transitions, 1246 flow [2023-08-29 23:08:14,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:14,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:14,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:14,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:14,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:14,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:14,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1364339437, now seen corresponding path program 9 times [2023-08-29 23:08:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795423216] [2023-08-29 23:08:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:15,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795423216] [2023-08-29 23:08:15,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795423216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129626452] [2023-08-29 23:08:15,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:15,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:15,005 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) [2023-08-29 23:08:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 23:08:15,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:08:15,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:15,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129626452] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:15,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:15,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-29 23:08:15,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772041540] [2023-08-29 23:08:15,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:08:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:08:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:08:15,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:15,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 102 transitions, 1246 flow. Second operand has 11 states, 11 states have (on average 183.27272727272728) internal successors, (2016), 11 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:15,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:15,441 INFO L130 PetriNetUnfolder]: 256/471 cut-off events. [2023-08-29 23:08:15,441 INFO L131 PetriNetUnfolder]: For 3477/3477 co-relation queries the response was YES. [2023-08-29 23:08:15,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 471 events. 256/471 cut-off events. For 3477/3477 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1971 event pairs, 21 based on Foata normal form. 6/477 useless extension candidates. Maximal degree in co-relation 2886. Up to 200 conditions per place. [2023-08-29 23:08:15,447 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 91 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2023-08-29 23:08:15,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 132 transitions, 1724 flow [2023-08-29 23:08:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1320 transitions. [2023-08-29 23:08:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43052837573385516 [2023-08-29 23:08:15,450 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1320 transitions. [2023-08-29 23:08:15,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1320 transitions. [2023-08-29 23:08:15,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:15,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1320 transitions. [2023-08-29 23:08:15,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,455 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,455 INFO L175 Difference]: Start difference. First operand has 112 places, 102 transitions, 1246 flow. Second operand 7 states and 1320 transitions. [2023-08-29 23:08:15,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 132 transitions, 1724 flow [2023-08-29 23:08:15,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 132 transitions, 1605 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-08-29 23:08:15,472 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 1248 flow [2023-08-29 23:08:15,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1248, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-08-29 23:08:15,472 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2023-08-29 23:08:15,473 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 1248 flow [2023-08-29 23:08:15,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.27272727272728) internal successors, (2016), 11 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:15,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:15,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:15,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:15,678 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:15,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1862073491, now seen corresponding path program 10 times [2023-08-29 23:08:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154581969] [2023-08-29 23:08:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:15,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154581969] [2023-08-29 23:08:15,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154581969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648087280] [2023-08-29 23:08:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:15,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:15,755 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:15,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 23:08:15,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:15,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648087280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:15,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:15,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343644851] [2023-08-29 23:08:15,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:15,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:15,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 1248 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:15,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:15,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:15,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:16,371 INFO L130 PetriNetUnfolder]: 324/611 cut-off events. [2023-08-29 23:08:16,371 INFO L131 PetriNetUnfolder]: For 6147/6147 co-relation queries the response was YES. [2023-08-29 23:08:16,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 611 events. 324/611 cut-off events. For 6147/6147 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2795 event pairs, 11 based on Foata normal form. 10/621 useless extension candidates. Maximal degree in co-relation 3888. Up to 187 conditions per place. [2023-08-29 23:08:16,377 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 118 selfloop transitions, 81 changer transitions 1/200 dead transitions. [2023-08-29 23:08:16,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 200 transitions, 2549 flow [2023-08-29 23:08:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:08:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:08:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3735 transitions. [2023-08-29 23:08:16,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263698630136986 [2023-08-29 23:08:16,382 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3735 transitions. [2023-08-29 23:08:16,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3735 transitions. [2023-08-29 23:08:16,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:16,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3735 transitions. [2023-08-29 23:08:16,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 186.75) internal successors, (3735), 20 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:16,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:16,396 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:16,396 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 1248 flow. Second operand 20 states and 3735 transitions. [2023-08-29 23:08:16,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 200 transitions, 2549 flow [2023-08-29 23:08:16,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 200 transitions, 2351 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:16,418 INFO L231 Difference]: Finished difference. Result has 130 places, 145 transitions, 2008 flow [2023-08-29 23:08:16,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2008, PETRI_PLACES=130, PETRI_TRANSITIONS=145} [2023-08-29 23:08:16,419 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2023-08-29 23:08:16,419 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 145 transitions, 2008 flow [2023-08-29 23:08:16,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:16,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:16,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:16,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:16,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 23:08:16,627 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:16,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:16,628 INFO L85 PathProgramCache]: Analyzing trace with hash 801128094, now seen corresponding path program 11 times [2023-08-29 23:08:16,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:16,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133813649] [2023-08-29 23:08:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:16,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133813649] [2023-08-29 23:08:16,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133813649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534672696] [2023-08-29 23:08:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:16,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:16,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:16,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 23:08:16,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:08:16,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:16,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:16,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:16,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534672696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:16,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:16,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463870333] [2023-08-29 23:08:16,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:16,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:16,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:16,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 145 transitions, 2008 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:16,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:16,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:16,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:17,247 INFO L130 PetriNetUnfolder]: 404/781 cut-off events. [2023-08-29 23:08:17,248 INFO L131 PetriNetUnfolder]: For 10078/10078 co-relation queries the response was YES. [2023-08-29 23:08:17,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 781 events. 404/781 cut-off events. For 10078/10078 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3878 event pairs, 75 based on Foata normal form. 8/789 useless extension candidates. Maximal degree in co-relation 5272. Up to 331 conditions per place. [2023-08-29 23:08:17,257 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 163 selfloop transitions, 66 changer transitions 0/229 dead transitions. [2023-08-29 23:08:17,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 229 transitions, 3433 flow [2023-08-29 23:08:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:08:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:08:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2444 transitions. [2023-08-29 23:08:17,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292237442922374 [2023-08-29 23:08:17,263 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2444 transitions. [2023-08-29 23:08:17,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2444 transitions. [2023-08-29 23:08:17,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:17,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2444 transitions. [2023-08-29 23:08:17,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.0) internal successors, (2444), 13 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:17,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:17,272 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:17,272 INFO L175 Difference]: Start difference. First operand has 130 places, 145 transitions, 2008 flow. Second operand 13 states and 2444 transitions. [2023-08-29 23:08:17,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 229 transitions, 3433 flow [2023-08-29 23:08:17,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2646 flow, removed 358 selfloop flow, removed 6 redundant places. [2023-08-29 23:08:17,321 INFO L231 Difference]: Finished difference. Result has 142 places, 164 transitions, 2018 flow [2023-08-29 23:08:17,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2018, PETRI_PLACES=142, PETRI_TRANSITIONS=164} [2023-08-29 23:08:17,321 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-08-29 23:08:17,321 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 164 transitions, 2018 flow [2023-08-29 23:08:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:17,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:17,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:17,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:17,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 23:08:17,527 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:17,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1824853525, now seen corresponding path program 12 times [2023-08-29 23:08:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:17,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292584834] [2023-08-29 23:08:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:17,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292584834] [2023-08-29 23:08:17,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292584834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498431350] [2023-08-29 23:08:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:08:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:17,601 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:17,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-29 23:08:17,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-29 23:08:17,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:17,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:17,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498431350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:17,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:17,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526817165] [2023-08-29 23:08:17,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:17,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:17,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:17,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 164 transitions, 2018 flow. Second operand has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:17,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:17,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:17,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:18,139 INFO L130 PetriNetUnfolder]: 400/771 cut-off events. [2023-08-29 23:08:18,139 INFO L131 PetriNetUnfolder]: For 6358/6358 co-relation queries the response was YES. [2023-08-29 23:08:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 771 events. 400/771 cut-off events. For 6358/6358 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3850 event pairs, 27 based on Foata normal form. 34/803 useless extension candidates. Maximal degree in co-relation 4556. Up to 446 conditions per place. [2023-08-29 23:08:18,147 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 137 selfloop transitions, 69 changer transitions 0/206 dead transitions. [2023-08-29 23:08:18,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 206 transitions, 2682 flow [2023-08-29 23:08:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:08:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:08:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2622 transitions. [2023-08-29 23:08:18,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42759295499021527 [2023-08-29 23:08:18,152 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2622 transitions. [2023-08-29 23:08:18,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2622 transitions. [2023-08-29 23:08:18,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:18,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2622 transitions. [2023-08-29 23:08:18,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 187.28571428571428) internal successors, (2622), 14 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:18,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:18,161 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:18,161 INFO L175 Difference]: Start difference. First operand has 142 places, 164 transitions, 2018 flow. Second operand 14 states and 2622 transitions. [2023-08-29 23:08:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 206 transitions, 2682 flow [2023-08-29 23:08:18,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 206 transitions, 2535 flow, removed 59 selfloop flow, removed 6 redundant places. [2023-08-29 23:08:18,196 INFO L231 Difference]: Finished difference. Result has 149 places, 163 transitions, 2072 flow [2023-08-29 23:08:18,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2072, PETRI_PLACES=149, PETRI_TRANSITIONS=163} [2023-08-29 23:08:18,199 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-08-29 23:08:18,199 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 163 transitions, 2072 flow [2023-08-29 23:08:18,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:18,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:18,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:18,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:18,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-29 23:08:18,406 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:18,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 810642430, now seen corresponding path program 13 times [2023-08-29 23:08:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:18,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277842697] [2023-08-29 23:08:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:18,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277842697] [2023-08-29 23:08:18,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277842697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:18,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461910575] [2023-08-29 23:08:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:08:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:18,509 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:18,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-29 23:08:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:18,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461910575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:18,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:18,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463154675] [2023-08-29 23:08:18,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:18,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:18,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:18,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 163 transitions, 2072 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:18,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:18,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:18,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:19,045 INFO L130 PetriNetUnfolder]: 389/754 cut-off events. [2023-08-29 23:08:19,046 INFO L131 PetriNetUnfolder]: For 6398/6398 co-relation queries the response was YES. [2023-08-29 23:08:19,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 754 events. 389/754 cut-off events. For 6398/6398 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3742 event pairs, 56 based on Foata normal form. 16/768 useless extension candidates. Maximal degree in co-relation 4518. Up to 264 conditions per place. [2023-08-29 23:08:19,057 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 146 selfloop transitions, 79 changer transitions 2/227 dead transitions. [2023-08-29 23:08:19,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 227 transitions, 2922 flow [2023-08-29 23:08:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:08:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:08:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3361 transitions. [2023-08-29 23:08:19,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263064434297311 [2023-08-29 23:08:19,062 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3361 transitions. [2023-08-29 23:08:19,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3361 transitions. [2023-08-29 23:08:19,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:19,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3361 transitions. [2023-08-29 23:08:19,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.72222222222223) internal successors, (3361), 18 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:19,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:19,074 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:19,075 INFO L175 Difference]: Start difference. First operand has 149 places, 163 transitions, 2072 flow. Second operand 18 states and 3361 transitions. [2023-08-29 23:08:19,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 227 transitions, 2922 flow [2023-08-29 23:08:19,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2811 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-29 23:08:19,110 INFO L231 Difference]: Finished difference. Result has 159 places, 166 transitions, 2182 flow [2023-08-29 23:08:19,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2182, PETRI_PLACES=159, PETRI_TRANSITIONS=166} [2023-08-29 23:08:19,112 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2023-08-29 23:08:19,112 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 166 transitions, 2182 flow [2023-08-29 23:08:19,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:19,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:19,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:19,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:19,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 23:08:19,318 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:19,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash -59756659, now seen corresponding path program 14 times [2023-08-29 23:08:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:19,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412279162] [2023-08-29 23:08:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:19,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:19,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:19,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412279162] [2023-08-29 23:08:19,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412279162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:19,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439136445] [2023-08-29 23:08:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:19,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:19,401 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:19,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-29 23:08:19,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:19,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:19,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:19,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439136445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:19,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:19,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:19,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360901643] [2023-08-29 23:08:19,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:19,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:19,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:19,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 166 transitions, 2182 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:19,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:19,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:19,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:20,049 INFO L130 PetriNetUnfolder]: 564/1111 cut-off events. [2023-08-29 23:08:20,049 INFO L131 PetriNetUnfolder]: For 10671/10671 co-relation queries the response was YES. [2023-08-29 23:08:20,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6923 conditions, 1111 events. 564/1111 cut-off events. For 10671/10671 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6256 event pairs, 23 based on Foata normal form. 18/1127 useless extension candidates. Maximal degree in co-relation 6872. Up to 406 conditions per place. [2023-08-29 23:08:20,068 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 167 selfloop transitions, 120 changer transitions 0/287 dead transitions. [2023-08-29 23:08:20,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 287 transitions, 4061 flow [2023-08-29 23:08:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:08:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:08:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2817 transitions. [2023-08-29 23:08:20,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876712328767125 [2023-08-29 23:08:20,073 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2817 transitions. [2023-08-29 23:08:20,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2817 transitions. [2023-08-29 23:08:20,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:20,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2817 transitions. [2023-08-29 23:08:20,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 187.8) internal successors, (2817), 15 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:20,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:20,085 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:20,085 INFO L175 Difference]: Start difference. First operand has 159 places, 166 transitions, 2182 flow. Second operand 15 states and 2817 transitions. [2023-08-29 23:08:20,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 287 transitions, 4061 flow [2023-08-29 23:08:20,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 287 transitions, 3806 flow, removed 82 selfloop flow, removed 11 redundant places. [2023-08-29 23:08:20,139 INFO L231 Difference]: Finished difference. Result has 167 places, 215 transitions, 3154 flow [2023-08-29 23:08:20,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3154, PETRI_PLACES=167, PETRI_TRANSITIONS=215} [2023-08-29 23:08:20,139 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2023-08-29 23:08:20,140 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 215 transitions, 3154 flow [2023-08-29 23:08:20,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:20,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:20,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:20,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:20,346 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:20,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:20,347 INFO L85 PathProgramCache]: Analyzing trace with hash -50242323, now seen corresponding path program 15 times [2023-08-29 23:08:20,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:20,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954392680] [2023-08-29 23:08:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:20,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:20,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:20,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954392680] [2023-08-29 23:08:20,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954392680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:20,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488429924] [2023-08-29 23:08:20,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:20,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:20,418 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:20,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-29 23:08:20,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:08:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:20,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:08:20,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488429924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:20,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:20,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:20,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136107712] [2023-08-29 23:08:20,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:20,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:20,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:20,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:20,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 215 transitions, 3154 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:20,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:20,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:20,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:21,167 INFO L130 PetriNetUnfolder]: 566/1133 cut-off events. [2023-08-29 23:08:21,167 INFO L131 PetriNetUnfolder]: For 12600/12600 co-relation queries the response was YES. [2023-08-29 23:08:21,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 1133 events. 566/1133 cut-off events. For 12600/12600 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6491 event pairs, 23 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 7360. Up to 342 conditions per place. [2023-08-29 23:08:21,178 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 155 selfloop transitions, 127 changer transitions 2/284 dead transitions. [2023-08-29 23:08:21,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 284 transitions, 4225 flow [2023-08-29 23:08:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:08:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:08:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3909 transitions. [2023-08-29 23:08:21,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249836921069798 [2023-08-29 23:08:21,192 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3909 transitions. [2023-08-29 23:08:21,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3909 transitions. [2023-08-29 23:08:21,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:21,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3909 transitions. [2023-08-29 23:08:21,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 186.14285714285714) internal successors, (3909), 21 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,210 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,210 INFO L175 Difference]: Start difference. First operand has 167 places, 215 transitions, 3154 flow. Second operand 21 states and 3909 transitions. [2023-08-29 23:08:21,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 284 transitions, 4225 flow [2023-08-29 23:08:21,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 284 transitions, 4088 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-08-29 23:08:21,284 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 3391 flow [2023-08-29 23:08:21,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3391, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2023-08-29 23:08:21,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2023-08-29 23:08:21,285 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 3391 flow [2023-08-29 23:08:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:21,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:21,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:21,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:21,491 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:21,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash 244702093, now seen corresponding path program 16 times [2023-08-29 23:08:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:21,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486232103] [2023-08-29 23:08:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:21,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:21,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486232103] [2023-08-29 23:08:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486232103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:21,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706324629] [2023-08-29 23:08:21,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:21,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:21,571 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:21,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-29 23:08:21,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:21,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:21,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:21,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:21,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:21,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706324629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:21,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:21,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-29 23:08:21,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312250897] [2023-08-29 23:08:21,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:21,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:08:21,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:21,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:08:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:08:21,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:21,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 3391 flow. Second operand has 15 states, 15 states have (on average 182.73333333333332) internal successors, (2741), 15 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:21,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:21,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:21,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:22,301 INFO L130 PetriNetUnfolder]: 629/1260 cut-off events. [2023-08-29 23:08:22,301 INFO L131 PetriNetUnfolder]: For 14729/14729 co-relation queries the response was YES. [2023-08-29 23:08:22,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8607 conditions, 1260 events. 629/1260 cut-off events. For 14729/14729 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7390 event pairs, 25 based on Foata normal form. 6/1266 useless extension candidates. Maximal degree in co-relation 8548. Up to 359 conditions per place. [2023-08-29 23:08:22,314 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 152 selfloop transitions, 141 changer transitions 4/297 dead transitions. [2023-08-29 23:08:22,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 297 transitions, 4781 flow [2023-08-29 23:08:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:08:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:08:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3718 transitions. [2023-08-29 23:08:22,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42442922374429226 [2023-08-29 23:08:22,319 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3718 transitions. [2023-08-29 23:08:22,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3718 transitions. [2023-08-29 23:08:22,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:22,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3718 transitions. [2023-08-29 23:08:22,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 185.9) internal successors, (3718), 20 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:22,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:22,332 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:22,332 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 3391 flow. Second operand 20 states and 3718 transitions. [2023-08-29 23:08:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 297 transitions, 4781 flow [2023-08-29 23:08:22,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 297 transitions, 4502 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:22,424 INFO L231 Difference]: Finished difference. Result has 201 places, 244 transitions, 4046 flow [2023-08-29 23:08:22,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4046, PETRI_PLACES=201, PETRI_TRANSITIONS=244} [2023-08-29 23:08:22,425 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2023-08-29 23:08:22,425 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 244 transitions, 4046 flow [2023-08-29 23:08:22,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.73333333333332) internal successors, (2741), 15 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:22,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:22,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:22,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:22,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:22,631 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:22,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1495872819, now seen corresponding path program 17 times [2023-08-29 23:08:22,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:22,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778827167] [2023-08-29 23:08:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:22,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:22,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778827167] [2023-08-29 23:08:22,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778827167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:22,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766304459] [2023-08-29 23:08:22,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:22,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:22,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:22,721 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:22,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-29 23:08:22,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:08:22,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:22,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:22,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:22,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766304459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:22,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:22,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-29 23:08:22,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285656374] [2023-08-29 23:08:22,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:22,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:08:22,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:08:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:08:22,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:22,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 244 transitions, 4046 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:22,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:22,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:23,489 INFO L130 PetriNetUnfolder]: 701/1404 cut-off events. [2023-08-29 23:08:23,490 INFO L131 PetriNetUnfolder]: For 21021/21021 co-relation queries the response was YES. [2023-08-29 23:08:23,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 1404 events. 701/1404 cut-off events. For 21021/21021 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8478 event pairs, 220 based on Foata normal form. 36/1440 useless extension candidates. Maximal degree in co-relation 10056. Up to 1158 conditions per place. [2023-08-29 23:08:23,502 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 262 selfloop transitions, 58 changer transitions 1/321 dead transitions. [2023-08-29 23:08:23,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 321 transitions, 5677 flow [2023-08-29 23:08:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:08:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:08:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2445 transitions. [2023-08-29 23:08:23,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293993677555321 [2023-08-29 23:08:23,507 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2445 transitions. [2023-08-29 23:08:23,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2445 transitions. [2023-08-29 23:08:23,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:23,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2445 transitions. [2023-08-29 23:08:23,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.07692307692307) internal successors, (2445), 13 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:23,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:23,515 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:23,515 INFO L175 Difference]: Start difference. First operand has 201 places, 244 transitions, 4046 flow. Second operand 13 states and 2445 transitions. [2023-08-29 23:08:23,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 321 transitions, 5677 flow [2023-08-29 23:08:23,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 321 transitions, 5531 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:23,638 INFO L231 Difference]: Finished difference. Result has 212 places, 269 transitions, 4671 flow [2023-08-29 23:08:23,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4671, PETRI_PLACES=212, PETRI_TRANSITIONS=269} [2023-08-29 23:08:23,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2023-08-29 23:08:23,638 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 269 transitions, 4671 flow [2023-08-29 23:08:23,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:23,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:23,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:23,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:23,844 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:23,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1835640755, now seen corresponding path program 18 times [2023-08-29 23:08:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107282776] [2023-08-29 23:08:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:23,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107282776] [2023-08-29 23:08:23,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107282776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:23,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848710836] [2023-08-29 23:08:23,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:08:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:23,913 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:23,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-29 23:08:23,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-29 23:08:23,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:24,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:24,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848710836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:24,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:24,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 23:08:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110304519] [2023-08-29 23:08:24,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:24,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:24,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:24,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:24,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 269 transitions, 4671 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:24,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:24,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:24,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:24,589 INFO L130 PetriNetUnfolder]: 735/1492 cut-off events. [2023-08-29 23:08:24,590 INFO L131 PetriNetUnfolder]: For 27399/27399 co-relation queries the response was YES. [2023-08-29 23:08:24,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11488 conditions, 1492 events. 735/1492 cut-off events. For 27399/27399 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9319 event pairs, 87 based on Foata normal form. 6/1498 useless extension candidates. Maximal degree in co-relation 11416. Up to 379 conditions per place. [2023-08-29 23:08:24,606 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 187 selfloop transitions, 144 changer transitions 5/336 dead transitions. [2023-08-29 23:08:24,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 6122 flow [2023-08-29 23:08:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:08:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:08:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3349 transitions. [2023-08-29 23:08:24,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247843734145104 [2023-08-29 23:08:24,610 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3349 transitions. [2023-08-29 23:08:24,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3349 transitions. [2023-08-29 23:08:24,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:24,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3349 transitions. [2023-08-29 23:08:24,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.05555555555554) internal successors, (3349), 18 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:24,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:24,620 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:24,620 INFO L175 Difference]: Start difference. First operand has 212 places, 269 transitions, 4671 flow. Second operand 18 states and 3349 transitions. [2023-08-29 23:08:24,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 6122 flow [2023-08-29 23:08:24,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 5670 flow, removed 205 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:24,798 INFO L231 Difference]: Finished difference. Result has 230 places, 283 transitions, 5005 flow [2023-08-29 23:08:24,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5005, PETRI_PLACES=230, PETRI_TRANSITIONS=283} [2023-08-29 23:08:24,799 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 201 predicate places. [2023-08-29 23:08:24,799 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 283 transitions, 5005 flow [2023-08-29 23:08:24,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:24,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:24,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:24,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:25,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:25,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:25,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash 119414706, now seen corresponding path program 19 times [2023-08-29 23:08:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:25,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342366188] [2023-08-29 23:08:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:25,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:25,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342366188] [2023-08-29 23:08:25,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342366188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242773890] [2023-08-29 23:08:25,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:08:25,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:25,086 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:25,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-29 23:08:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:25,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:25,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242773890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:25,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582414911] [2023-08-29 23:08:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:25,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 283 transitions, 5005 flow. Second operand has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:25,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:25,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:25,969 INFO L130 PetriNetUnfolder]: 875/1790 cut-off events. [2023-08-29 23:08:25,969 INFO L131 PetriNetUnfolder]: For 37031/37031 co-relation queries the response was YES. [2023-08-29 23:08:25,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14270 conditions, 1790 events. 875/1790 cut-off events. For 37031/37031 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11693 event pairs, 54 based on Foata normal form. 10/1800 useless extension candidates. Maximal degree in co-relation 14193. Up to 1185 conditions per place. [2023-08-29 23:08:25,989 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 299 selfloop transitions, 102 changer transitions 0/401 dead transitions. [2023-08-29 23:08:25,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 401 transitions, 7620 flow [2023-08-29 23:08:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:08:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:08:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2818 transitions. [2023-08-29 23:08:25,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289193302891933 [2023-08-29 23:08:25,993 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2818 transitions. [2023-08-29 23:08:25,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2818 transitions. [2023-08-29 23:08:25,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:25,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2818 transitions. [2023-08-29 23:08:25,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 187.86666666666667) internal successors, (2818), 15 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:26,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:26,001 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 438.0) internal successors, (7008), 16 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:26,001 INFO L175 Difference]: Start difference. First operand has 230 places, 283 transitions, 5005 flow. Second operand 15 states and 2818 transitions. [2023-08-29 23:08:26,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 401 transitions, 7620 flow [2023-08-29 23:08:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 401 transitions, 7328 flow, removed 124 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:26,243 INFO L231 Difference]: Finished difference. Result has 245 places, 327 transitions, 6058 flow [2023-08-29 23:08:26,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=4825, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6058, PETRI_PLACES=245, PETRI_TRANSITIONS=327} [2023-08-29 23:08:26,244 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 216 predicate places. [2023-08-29 23:08:26,244 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 327 transitions, 6058 flow [2023-08-29 23:08:26,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:26,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:26,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:26,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-29 23:08:26,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-29 23:08:26,450 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:26,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash 481739322, now seen corresponding path program 20 times [2023-08-29 23:08:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:26,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268321231] [2023-08-29 23:08:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:26,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268321231] [2023-08-29 23:08:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268321231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824023691] [2023-08-29 23:08:26,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:26,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:26,521 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:26,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-29 23:08:26,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:26,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:26,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:26,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824023691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:26,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:26,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:26,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103686354] [2023-08-29 23:08:26,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:26,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:26,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:26,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:26,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 327 transitions, 6058 flow. Second operand has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:26,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:26,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:26,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:27,416 INFO L130 PetriNetUnfolder]: 926/1897 cut-off events. [2023-08-29 23:08:27,416 INFO L131 PetriNetUnfolder]: For 43347/43347 co-relation queries the response was YES. [2023-08-29 23:08:27,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15614 conditions, 1897 events. 926/1897 cut-off events. For 43347/43347 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12649 event pairs, 40 based on Foata normal form. 16/1913 useless extension candidates. Maximal degree in co-relation 15531. Up to 932 conditions per place. [2023-08-29 23:08:27,433 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 279 selfloop transitions, 129 changer transitions 1/409 dead transitions. [2023-08-29 23:08:27,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 409 transitions, 8137 flow [2023-08-29 23:08:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:08:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:08:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3905 transitions. [2023-08-29 23:08:27,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42454881495977387 [2023-08-29 23:08:27,438 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3905 transitions. [2023-08-29 23:08:27,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3905 transitions. [2023-08-29 23:08:27,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:27,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3905 transitions. [2023-08-29 23:08:27,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 185.95238095238096) internal successors, (3905), 21 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:27,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:27,483 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:27,483 INFO L175 Difference]: Start difference. First operand has 245 places, 327 transitions, 6058 flow. Second operand 21 states and 3905 transitions. [2023-08-29 23:08:27,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 409 transitions, 8137 flow [2023-08-29 23:08:27,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 409 transitions, 7601 flow, removed 173 selfloop flow, removed 8 redundant places. [2023-08-29 23:08:27,767 INFO L231 Difference]: Finished difference. Result has 266 places, 356 transitions, 6760 flow [2023-08-29 23:08:27,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6760, PETRI_PLACES=266, PETRI_TRANSITIONS=356} [2023-08-29 23:08:27,768 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 237 predicate places. [2023-08-29 23:08:27,768 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 356 transitions, 6760 flow [2023-08-29 23:08:27,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:27,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:27,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:27,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-29 23:08:27,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-29 23:08:27,970 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:27,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash -881269082, now seen corresponding path program 21 times [2023-08-29 23:08:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662797573] [2023-08-29 23:08:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:27,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662797573] [2023-08-29 23:08:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662797573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966168369] [2023-08-29 23:08:28,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:28,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:28,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:28,042 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:28,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-29 23:08:28,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:08:28,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:28,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:08:28,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966168369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:28,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:28,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:28,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607383609] [2023-08-29 23:08:28,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:28,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:28,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:28,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 356 transitions, 6760 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:28,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:28,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:28,868 INFO L130 PetriNetUnfolder]: 909/1876 cut-off events. [2023-08-29 23:08:28,869 INFO L131 PetriNetUnfolder]: For 44600/44600 co-relation queries the response was YES. [2023-08-29 23:08:28,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15618 conditions, 1876 events. 909/1876 cut-off events. For 44600/44600 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12556 event pairs, 30 based on Foata normal form. 16/1892 useless extension candidates. Maximal degree in co-relation 15527. Up to 736 conditions per place. [2023-08-29 23:08:28,887 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 281 selfloop transitions, 158 changer transitions 1/440 dead transitions. [2023-08-29 23:08:28,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 440 transitions, 8531 flow [2023-08-29 23:08:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:08:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:08:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3928 transitions. [2023-08-29 23:08:28,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42704935855620785 [2023-08-29 23:08:28,892 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3928 transitions. [2023-08-29 23:08:28,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3928 transitions. [2023-08-29 23:08:28,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:28,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3928 transitions. [2023-08-29 23:08:28,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.04761904761904) internal successors, (3928), 21 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:28,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:28,903 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:28,903 INFO L175 Difference]: Start difference. First operand has 266 places, 356 transitions, 6760 flow. Second operand 21 states and 3928 transitions. [2023-08-29 23:08:28,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 440 transitions, 8531 flow [2023-08-29 23:08:29,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 440 transitions, 8208 flow, removed 122 selfloop flow, removed 10 redundant places. [2023-08-29 23:08:29,184 INFO L231 Difference]: Finished difference. Result has 280 places, 365 transitions, 7138 flow [2023-08-29 23:08:29,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=6334, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7138, PETRI_PLACES=280, PETRI_TRANSITIONS=365} [2023-08-29 23:08:29,184 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 251 predicate places. [2023-08-29 23:08:29,184 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 365 transitions, 7138 flow [2023-08-29 23:08:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:29,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:29,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:29,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-29 23:08:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-29 23:08:29,386 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:29,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1859052538, now seen corresponding path program 22 times [2023-08-29 23:08:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:29,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190185727] [2023-08-29 23:08:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:29,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:29,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190185727] [2023-08-29 23:08:29,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190185727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:29,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287820648] [2023-08-29 23:08:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:29,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:29,457 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:29,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-29 23:08:29,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:29,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:29,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287820648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:29,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:29,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-29 23:08:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325809134] [2023-08-29 23:08:29,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:29,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:08:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:29,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:08:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:08:29,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:29,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 365 transitions, 7138 flow. Second operand has 15 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:29,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:29,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:29,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:30,364 INFO L130 PetriNetUnfolder]: 926/1921 cut-off events. [2023-08-29 23:08:30,364 INFO L131 PetriNetUnfolder]: For 49114/49114 co-relation queries the response was YES. [2023-08-29 23:08:30,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16585 conditions, 1921 events. 926/1921 cut-off events. For 49114/49114 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12977 event pairs, 32 based on Foata normal form. 16/1937 useless extension candidates. Maximal degree in co-relation 16493. Up to 797 conditions per place. [2023-08-29 23:08:30,380 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 268 selfloop transitions, 170 changer transitions 5/443 dead transitions. [2023-08-29 23:08:30,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 8964 flow [2023-08-29 23:08:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:08:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:08:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4284 transitions. [2023-08-29 23:08:30,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252531268612269 [2023-08-29 23:08:30,388 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4284 transitions. [2023-08-29 23:08:30,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4284 transitions. [2023-08-29 23:08:30,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:30,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4284 transitions. [2023-08-29 23:08:30,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 186.2608695652174) internal successors, (4284), 23 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:30,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:30,399 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:30,399 INFO L175 Difference]: Start difference. First operand has 280 places, 365 transitions, 7138 flow. Second operand 23 states and 4284 transitions. [2023-08-29 23:08:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 8964 flow [2023-08-29 23:08:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 443 transitions, 8493 flow, removed 195 selfloop flow, removed 9 redundant places. [2023-08-29 23:08:30,684 INFO L231 Difference]: Finished difference. Result has 298 places, 376 transitions, 7633 flow [2023-08-29 23:08:30,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7633, PETRI_PLACES=298, PETRI_TRANSITIONS=376} [2023-08-29 23:08:30,684 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 269 predicate places. [2023-08-29 23:08:30,684 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 376 transitions, 7633 flow [2023-08-29 23:08:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:30,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:30,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:30,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-29 23:08:30,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:30,886 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:30,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash -574540519, now seen corresponding path program 23 times [2023-08-29 23:08:30,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:30,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607969698] [2023-08-29 23:08:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:30,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607969698] [2023-08-29 23:08:30,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607969698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:30,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638241215] [2023-08-29 23:08:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:30,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:30,949 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:30,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-29 23:08:31,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:31,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:08:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638241215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:31,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:31,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488740759] [2023-08-29 23:08:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:31,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:31,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:31,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:31,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:31,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:31,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 376 transitions, 7633 flow. Second operand has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:31,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:31,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:31,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:31,833 INFO L130 PetriNetUnfolder]: 1053/2178 cut-off events. [2023-08-29 23:08:31,833 INFO L131 PetriNetUnfolder]: For 61695/61695 co-relation queries the response was YES. [2023-08-29 23:08:31,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19499 conditions, 2178 events. 1053/2178 cut-off events. For 61695/61695 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15178 event pairs, 153 based on Foata normal form. 16/2194 useless extension candidates. Maximal degree in co-relation 19401. Up to 621 conditions per place. [2023-08-29 23:08:31,859 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 299 selfloop transitions, 174 changer transitions 2/475 dead transitions. [2023-08-29 23:08:31,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 475 transitions, 10418 flow [2023-08-29 23:08:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 23:08:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 23:08:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2983 transitions. [2023-08-29 23:08:31,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256563926940639 [2023-08-29 23:08:31,863 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2983 transitions. [2023-08-29 23:08:31,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2983 transitions. [2023-08-29 23:08:31,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:31,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2983 transitions. [2023-08-29 23:08:31,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 186.4375) internal successors, (2983), 16 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:31,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 438.0) internal successors, (7446), 17 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:31,871 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 438.0) internal successors, (7446), 17 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:31,871 INFO L175 Difference]: Start difference. First operand has 298 places, 376 transitions, 7633 flow. Second operand 16 states and 2983 transitions. [2023-08-29 23:08:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 475 transitions, 10418 flow [2023-08-29 23:08:32,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 475 transitions, 9844 flow, removed 203 selfloop flow, removed 11 redundant places. [2023-08-29 23:08:32,275 INFO L231 Difference]: Finished difference. Result has 308 places, 413 transitions, 8796 flow [2023-08-29 23:08:32,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8796, PETRI_PLACES=308, PETRI_TRANSITIONS=413} [2023-08-29 23:08:32,275 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 279 predicate places. [2023-08-29 23:08:32,275 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 413 transitions, 8796 flow [2023-08-29 23:08:32,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 182.92307692307693) internal successors, (2378), 13 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:32,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:32,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:32,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:32,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-29 23:08:32,477 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:32,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:32,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1485921204, now seen corresponding path program 24 times [2023-08-29 23:08:32,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:32,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084846476] [2023-08-29 23:08:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:32,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:32,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084846476] [2023-08-29 23:08:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084846476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832463022] [2023-08-29 23:08:32,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:08:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:32,541 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:32,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-29 23:08:32,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-29 23:08:32,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:32,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:32,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832463022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:32,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:32,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-29 23:08:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581252748] [2023-08-29 23:08:32,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:32,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:08:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:08:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:08:32,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:32,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 413 transitions, 8796 flow. Second operand has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:32,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:32,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:32,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:33,489 INFO L130 PetriNetUnfolder]: 1084/2221 cut-off events. [2023-08-29 23:08:33,489 INFO L131 PetriNetUnfolder]: For 65458/65458 co-relation queries the response was YES. [2023-08-29 23:08:33,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 2221 events. 1084/2221 cut-off events. For 65458/65458 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15338 event pairs, 44 based on Foata normal form. 16/2237 useless extension candidates. Maximal degree in co-relation 20199. Up to 1681 conditions per place. [2023-08-29 23:08:33,509 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 351 selfloop transitions, 104 changer transitions 0/455 dead transitions. [2023-08-29 23:08:33,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 455 transitions, 10367 flow [2023-08-29 23:08:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:08:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:08:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1314 transitions. [2023-08-29 23:08:33,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-29 23:08:33,511 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1314 transitions. [2023-08-29 23:08:33,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1314 transitions. [2023-08-29 23:08:33,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:33,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1314 transitions. [2023-08-29 23:08:33,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.71428571428572) internal successors, (1314), 7 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:33,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:33,515 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:33,515 INFO L175 Difference]: Start difference. First operand has 308 places, 413 transitions, 8796 flow. Second operand 7 states and 1314 transitions. [2023-08-29 23:08:33,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 455 transitions, 10367 flow [2023-08-29 23:08:33,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 9894 flow, removed 186 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:33,900 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 8838 flow [2023-08-29 23:08:33,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8838, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2023-08-29 23:08:33,901 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 279 predicate places. [2023-08-29 23:08:33,901 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 8838 flow [2023-08-29 23:08:33,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:33,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:33,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:33,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-29 23:08:34,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-29 23:08:34,102 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:34,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash 717663227, now seen corresponding path program 25 times [2023-08-29 23:08:34,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:34,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028646879] [2023-08-29 23:08:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:34,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028646879] [2023-08-29 23:08:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028646879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067288532] [2023-08-29 23:08:34,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:08:34,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:34,181 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:34,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-29 23:08:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:34,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067288532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:34,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:34,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-29 23:08:34,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094387021] [2023-08-29 23:08:34,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:34,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 23:08:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 23:08:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-29 23:08:34,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:34,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 8838 flow. Second operand has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:34,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:34,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:34,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:34,960 INFO L130 PetriNetUnfolder]: 1080/2209 cut-off events. [2023-08-29 23:08:34,961 INFO L131 PetriNetUnfolder]: For 57907/57907 co-relation queries the response was YES. [2023-08-29 23:08:34,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19579 conditions, 2209 events. 1080/2209 cut-off events. For 57907/57907 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15257 event pairs, 209 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 19475. Up to 1055 conditions per place. [2023-08-29 23:08:34,976 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 303 selfloop transitions, 139 changer transitions 5/447 dead transitions. [2023-08-29 23:08:34,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 9899 flow [2023-08-29 23:08:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:08:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:08:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2045 transitions. [2023-08-29 23:08:34,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244499792444998 [2023-08-29 23:08:34,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2045 transitions. [2023-08-29 23:08:34,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2045 transitions. [2023-08-29 23:08:34,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:34,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2045 transitions. [2023-08-29 23:08:34,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.9090909090909) internal successors, (2045), 11 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:34,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:34,983 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:34,983 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 8838 flow. Second operand 11 states and 2045 transitions. [2023-08-29 23:08:34,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 9899 flow [2023-08-29 23:08:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 447 transitions, 9723 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-29 23:08:35,348 INFO L231 Difference]: Finished difference. Result has 313 places, 420 transitions, 8852 flow [2023-08-29 23:08:35,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8641, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8852, PETRI_PLACES=313, PETRI_TRANSITIONS=420} [2023-08-29 23:08:35,349 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2023-08-29 23:08:35,349 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 420 transitions, 8852 flow [2023-08-29 23:08:35,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 183.0909090909091) internal successors, (2014), 11 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:35,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:35,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:35,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-29 23:08:35,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:35,550 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:35,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1669212684, now seen corresponding path program 26 times [2023-08-29 23:08:35,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:35,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43941444] [2023-08-29 23:08:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:35,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:35,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43941444] [2023-08-29 23:08:35,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43941444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107425927] [2023-08-29 23:08:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:35,620 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-29 23:08:35,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:35,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107425927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:35,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:35,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 23:08:35,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724410520] [2023-08-29 23:08:35,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:35,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:35,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:35,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:35,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 420 transitions, 8852 flow. Second operand has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:35,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:35,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:35,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:36,535 INFO L130 PetriNetUnfolder]: 1114/2253 cut-off events. [2023-08-29 23:08:36,535 INFO L131 PetriNetUnfolder]: For 61609/61609 co-relation queries the response was YES. [2023-08-29 23:08:36,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20303 conditions, 2253 events. 1114/2253 cut-off events. For 61609/61609 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15393 event pairs, 80 based on Foata normal form. 16/2269 useless extension candidates. Maximal degree in co-relation 20201. Up to 1994 conditions per place. [2023-08-29 23:08:36,554 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 386 selfloop transitions, 74 changer transitions 0/460 dead transitions. [2023-08-29 23:08:36,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 460 transitions, 10347 flow [2023-08-29 23:08:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:08:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:08:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2049 transitions. [2023-08-29 23:08:36,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528019925280197 [2023-08-29 23:08:36,556 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2049 transitions. [2023-08-29 23:08:36,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2049 transitions. [2023-08-29 23:08:36,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:36,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2049 transitions. [2023-08-29 23:08:36,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.27272727272728) internal successors, (2049), 11 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:36,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:36,567 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:36,567 INFO L175 Difference]: Start difference. First operand has 313 places, 420 transitions, 8852 flow. Second operand 11 states and 2049 transitions. [2023-08-29 23:08:36,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 460 transitions, 10347 flow [2023-08-29 23:08:36,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 460 transitions, 10070 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:36,950 INFO L231 Difference]: Finished difference. Result has 312 places, 437 transitions, 9116 flow [2023-08-29 23:08:36,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9116, PETRI_PLACES=312, PETRI_TRANSITIONS=437} [2023-08-29 23:08:36,950 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 283 predicate places. [2023-08-29 23:08:36,950 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 437 transitions, 9116 flow [2023-08-29 23:08:36,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.07692307692307) internal successors, (2380), 13 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:36,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:36,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:36,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:37,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:37,151 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:37,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash -973883700, now seen corresponding path program 27 times [2023-08-29 23:08:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:37,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781517836] [2023-08-29 23:08:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:37,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:37,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781517836] [2023-08-29 23:08:37,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781517836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391761040] [2023-08-29 23:08:37,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:37,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:37,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:37,217 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:37,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-29 23:08:37,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:08:37,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:37,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:37,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391761040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:37,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:37,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178950478] [2023-08-29 23:08:37,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:37,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:37,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:37,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 437 transitions, 9116 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:37,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:37,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:37,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:38,179 INFO L130 PetriNetUnfolder]: 1144/2309 cut-off events. [2023-08-29 23:08:38,179 INFO L131 PetriNetUnfolder]: For 61387/61387 co-relation queries the response was YES. [2023-08-29 23:08:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20755 conditions, 2309 events. 1144/2309 cut-off events. For 61387/61387 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15845 event pairs, 38 based on Foata normal form. 8/2317 useless extension candidates. Maximal degree in co-relation 20649. Up to 990 conditions per place. [2023-08-29 23:08:38,200 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 302 selfloop transitions, 202 changer transitions 4/508 dead transitions. [2023-08-29 23:08:38,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 508 transitions, 11073 flow [2023-08-29 23:08:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:08:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:08:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3721 transitions. [2023-08-29 23:08:38,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247716894977169 [2023-08-29 23:08:38,204 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3721 transitions. [2023-08-29 23:08:38,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3721 transitions. [2023-08-29 23:08:38,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:38,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3721 transitions. [2023-08-29 23:08:38,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 186.05) internal successors, (3721), 20 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:38,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:38,213 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:38,213 INFO L175 Difference]: Start difference. First operand has 312 places, 437 transitions, 9116 flow. Second operand 20 states and 3721 transitions. [2023-08-29 23:08:38,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 508 transitions, 11073 flow [2023-08-29 23:08:38,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 508 transitions, 10905 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-29 23:08:38,714 INFO L231 Difference]: Finished difference. Result has 330 places, 450 transitions, 9930 flow [2023-08-29 23:08:38,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=8910, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9930, PETRI_PLACES=330, PETRI_TRANSITIONS=450} [2023-08-29 23:08:38,715 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 301 predicate places. [2023-08-29 23:08:38,715 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 450 transitions, 9930 flow [2023-08-29 23:08:38,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:38,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:38,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:38,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-29 23:08:38,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-29 23:08:38,916 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:38,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash -823420366, now seen corresponding path program 28 times [2023-08-29 23:08:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:38,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136130572] [2023-08-29 23:08:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:38,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136130572] [2023-08-29 23:08:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136130572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936767209] [2023-08-29 23:08:38,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:38,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:38,977 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:39,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-29 23:08:39,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:39,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:39,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:39,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:39,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936767209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:39,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:39,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97964424] [2023-08-29 23:08:39,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:39,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:39,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:39,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 450 transitions, 9930 flow. Second operand has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:39,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:39,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:39,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:39,997 INFO L130 PetriNetUnfolder]: 1123/2260 cut-off events. [2023-08-29 23:08:39,997 INFO L131 PetriNetUnfolder]: For 67887/67887 co-relation queries the response was YES. [2023-08-29 23:08:40,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 2260 events. 1123/2260 cut-off events. For 67887/67887 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15391 event pairs, 76 based on Foata normal form. 16/2276 useless extension candidates. Maximal degree in co-relation 21097. Up to 1737 conditions per place. [2023-08-29 23:08:40,021 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 355 selfloop transitions, 121 changer transitions 0/476 dead transitions. [2023-08-29 23:08:40,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 476 transitions, 11077 flow [2023-08-29 23:08:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:08:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:08:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2607 transitions. [2023-08-29 23:08:40,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425146771037182 [2023-08-29 23:08:40,024 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2607 transitions. [2023-08-29 23:08:40,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2607 transitions. [2023-08-29 23:08:40,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:40,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2607 transitions. [2023-08-29 23:08:40,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.21428571428572) internal successors, (2607), 14 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,029 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,029 INFO L175 Difference]: Start difference. First operand has 330 places, 450 transitions, 9930 flow. Second operand 14 states and 2607 transitions. [2023-08-29 23:08:40,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 476 transitions, 11077 flow [2023-08-29 23:08:40,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 476 transitions, 10723 flow, removed 33 selfloop flow, removed 15 redundant places. [2023-08-29 23:08:40,507 INFO L231 Difference]: Finished difference. Result has 323 places, 443 transitions, 9692 flow [2023-08-29 23:08:40,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=9358, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9692, PETRI_PLACES=323, PETRI_TRANSITIONS=443} [2023-08-29 23:08:40,508 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 294 predicate places. [2023-08-29 23:08:40,508 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 443 transitions, 9692 flow [2023-08-29 23:08:40,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.08333333333334) internal successors, (2197), 12 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:40,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:40,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:40,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-29 23:08:40,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:40,713 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:40,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash -611760485, now seen corresponding path program 29 times [2023-08-29 23:08:40,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:40,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964184530] [2023-08-29 23:08:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:40,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964184530] [2023-08-29 23:08:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964184530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013802856] [2023-08-29 23:08:40,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:40,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:40,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:40,779 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:40,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-29 23:08:40,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:08:40,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:40,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:40,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013802856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:40,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:40,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-29 23:08:40,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464406943] [2023-08-29 23:08:40,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:40,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:08:40,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:08:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:08:41,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:41,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 443 transitions, 9692 flow. Second operand has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:41,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:41,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:41,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:41,717 INFO L130 PetriNetUnfolder]: 1141/2316 cut-off events. [2023-08-29 23:08:41,717 INFO L131 PetriNetUnfolder]: For 69197/69197 co-relation queries the response was YES. [2023-08-29 23:08:41,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21426 conditions, 2316 events. 1141/2316 cut-off events. For 69197/69197 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16025 event pairs, 317 based on Foata normal form. 18/2334 useless extension candidates. Maximal degree in co-relation 21317. Up to 1661 conditions per place. [2023-08-29 23:08:41,738 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 398 selfloop transitions, 104 changer transitions 0/502 dead transitions. [2023-08-29 23:08:41,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 502 transitions, 11539 flow [2023-08-29 23:08:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:08:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:08:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2246 transitions. [2023-08-29 23:08:41,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273211567732116 [2023-08-29 23:08:41,740 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2246 transitions. [2023-08-29 23:08:41,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2246 transitions. [2023-08-29 23:08:41,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:41,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2246 transitions. [2023-08-29 23:08:41,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.16666666666666) internal successors, (2246), 12 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:41,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:41,743 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:41,743 INFO L175 Difference]: Start difference. First operand has 323 places, 443 transitions, 9692 flow. Second operand 12 states and 2246 transitions. [2023-08-29 23:08:41,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 502 transitions, 11539 flow [2023-08-29 23:08:42,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 502 transitions, 11285 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-29 23:08:42,173 INFO L231 Difference]: Finished difference. Result has 325 places, 451 transitions, 9883 flow [2023-08-29 23:08:42,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=9284, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9883, PETRI_PLACES=325, PETRI_TRANSITIONS=451} [2023-08-29 23:08:42,173 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 296 predicate places. [2023-08-29 23:08:42,173 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 451 transitions, 9883 flow [2023-08-29 23:08:42,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:42,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:42,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:42,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-29 23:08:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-29 23:08:42,374 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:42,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash 64083315, now seen corresponding path program 30 times [2023-08-29 23:08:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672723152] [2023-08-29 23:08:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:42,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:42,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672723152] [2023-08-29 23:08:42,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672723152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:42,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497478425] [2023-08-29 23:08:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:08:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:42,430 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:42,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-29 23:08:42,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:08:42,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:42,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497478425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:42,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276467866] [2023-08-29 23:08:42,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:42,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:42,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:42,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 451 transitions, 9883 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:42,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:42,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:42,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:43,370 INFO L130 PetriNetUnfolder]: 1203/2456 cut-off events. [2023-08-29 23:08:43,371 INFO L131 PetriNetUnfolder]: For 77520/77520 co-relation queries the response was YES. [2023-08-29 23:08:43,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23151 conditions, 2456 events. 1203/2456 cut-off events. For 77520/77520 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17358 event pairs, 274 based on Foata normal form. 12/2468 useless extension candidates. Maximal degree in co-relation 23041. Up to 1444 conditions per place. [2023-08-29 23:08:43,392 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 366 selfloop transitions, 168 changer transitions 0/534 dead transitions. [2023-08-29 23:08:43,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 534 transitions, 12508 flow [2023-08-29 23:08:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 23:08:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 23:08:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2437 transitions. [2023-08-29 23:08:43,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42799438004917456 [2023-08-29 23:08:43,394 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2437 transitions. [2023-08-29 23:08:43,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2437 transitions. [2023-08-29 23:08:43,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:43,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2437 transitions. [2023-08-29 23:08:43,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.46153846153845) internal successors, (2437), 13 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:43,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:43,398 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 438.0) internal successors, (6132), 14 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:43,398 INFO L175 Difference]: Start difference. First operand has 325 places, 451 transitions, 9883 flow. Second operand 13 states and 2437 transitions. [2023-08-29 23:08:43,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 534 transitions, 12508 flow [2023-08-29 23:08:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 534 transitions, 12276 flow, removed 33 selfloop flow, removed 11 redundant places. [2023-08-29 23:08:43,851 INFO L231 Difference]: Finished difference. Result has 328 places, 467 transitions, 10596 flow [2023-08-29 23:08:43,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=9541, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10596, PETRI_PLACES=328, PETRI_TRANSITIONS=467} [2023-08-29 23:08:43,852 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 299 predicate places. [2023-08-29 23:08:43,852 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 467 transitions, 10596 flow [2023-08-29 23:08:43,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:43,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:43,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:43,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:44,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:44,053 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:44,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 73597651, now seen corresponding path program 31 times [2023-08-29 23:08:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624354001] [2023-08-29 23:08:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:44,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624354001] [2023-08-29 23:08:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624354001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749579954] [2023-08-29 23:08:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:08:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:44,115 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:44,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-29 23:08:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:08:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:44,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749579954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:44,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-29 23:08:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842226747] [2023-08-29 23:08:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:08:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:08:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:08:44,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:08:44,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 467 transitions, 10596 flow. Second operand has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:44,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:44,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:08:44,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:45,086 INFO L130 PetriNetUnfolder]: 1197/2442 cut-off events. [2023-08-29 23:08:45,086 INFO L131 PetriNetUnfolder]: For 77508/77508 co-relation queries the response was YES. [2023-08-29 23:08:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23448 conditions, 2442 events. 1197/2442 cut-off events. For 77508/77508 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17218 event pairs, 167 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 23339. Up to 703 conditions per place. [2023-08-29 23:08:45,111 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 329 selfloop transitions, 197 changer transitions 2/528 dead transitions. [2023-08-29 23:08:45,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 528 transitions, 12627 flow [2023-08-29 23:08:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:08:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:08:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3348 transitions. [2023-08-29 23:08:45,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2023-08-29 23:08:45,113 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3348 transitions. [2023-08-29 23:08:45,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3348 transitions. [2023-08-29 23:08:45,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:45,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3348 transitions. [2023-08-29 23:08:45,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:45,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:45,119 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:45,119 INFO L175 Difference]: Start difference. First operand has 328 places, 467 transitions, 10596 flow. Second operand 18 states and 3348 transitions. [2023-08-29 23:08:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 528 transitions, 12627 flow [2023-08-29 23:08:45,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 528 transitions, 12421 flow, removed 59 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:45,600 INFO L231 Difference]: Finished difference. Result has 337 places, 468 transitions, 10932 flow [2023-08-29 23:08:45,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=10272, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10932, PETRI_PLACES=337, PETRI_TRANSITIONS=468} [2023-08-29 23:08:45,601 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 308 predicate places. [2023-08-29 23:08:45,601 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 468 transitions, 10932 flow [2023-08-29 23:08:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.0) internal successors, (2196), 12 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:45,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:45,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:45,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-29 23:08:45,805 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:45,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash -497534338, now seen corresponding path program 32 times [2023-08-29 23:08:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:45,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679304886] [2023-08-29 23:08:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:46,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679304886] [2023-08-29 23:08:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679304886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860294403] [2023-08-29 23:08:46,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:08:46,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:46,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:46,277 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:46,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-29 23:08:46,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:46,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:08:46,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:46,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:46,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860294403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:46,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:46,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-29 23:08:46,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750762686] [2023-08-29 23:08:46,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:46,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:08:46,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:08:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:08:47,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:47,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 468 transitions, 10932 flow. Second operand has 19 states, 19 states have (on average 175.05263157894737) internal successors, (3326), 19 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:47,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:47,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:47,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:48,215 INFO L130 PetriNetUnfolder]: 1392/2876 cut-off events. [2023-08-29 23:08:48,215 INFO L131 PetriNetUnfolder]: For 93552/93554 co-relation queries the response was YES. [2023-08-29 23:08:48,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28207 conditions, 2876 events. 1392/2876 cut-off events. For 93552/93554 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 21203 event pairs, 93 based on Foata normal form. 5/2876 useless extension candidates. Maximal degree in co-relation 28097. Up to 2263 conditions per place. [2023-08-29 23:08:48,255 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 473 selfloop transitions, 112 changer transitions 14/609 dead transitions. [2023-08-29 23:08:48,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 609 transitions, 14541 flow [2023-08-29 23:08:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:08:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:08:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1985 transitions. [2023-08-29 23:08:48,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119966791199668 [2023-08-29 23:08:48,258 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1985 transitions. [2023-08-29 23:08:48,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1985 transitions. [2023-08-29 23:08:48,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:48,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1985 transitions. [2023-08-29 23:08:48,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 180.45454545454547) internal successors, (1985), 11 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:48,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:48,263 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:48,263 INFO L175 Difference]: Start difference. First operand has 337 places, 468 transitions, 10932 flow. Second operand 11 states and 1985 transitions. [2023-08-29 23:08:48,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 609 transitions, 14541 flow [2023-08-29 23:08:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 609 transitions, 14282 flow, removed 55 selfloop flow, removed 8 redundant places. [2023-08-29 23:08:49,153 INFO L231 Difference]: Finished difference. Result has 345 places, 533 transitions, 12728 flow [2023-08-29 23:08:49,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=10715, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12728, PETRI_PLACES=345, PETRI_TRANSITIONS=533} [2023-08-29 23:08:49,153 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 316 predicate places. [2023-08-29 23:08:49,154 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 533 transitions, 12728 flow [2023-08-29 23:08:49,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 175.05263157894737) internal successors, (3326), 19 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:49,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:49,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:49,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:49,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-29 23:08:49,355 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:49,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1390097594, now seen corresponding path program 33 times [2023-08-29 23:08:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:49,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528504650] [2023-08-29 23:08:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528504650] [2023-08-29 23:08:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528504650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590258961] [2023-08-29 23:08:49,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:08:49,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:49,857 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:49,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-29 23:08:49,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:08:49,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:08:49,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:50,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:50,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590258961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:50,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:50,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 23:08:50,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414289439] [2023-08-29 23:08:50,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:50,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:08:50,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:08:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:08:50,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:50,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 533 transitions, 12728 flow. Second operand has 15 states, 15 states have (on average 175.2) internal successors, (2628), 15 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:50,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:50,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:50,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:51,910 INFO L130 PetriNetUnfolder]: 1392/2852 cut-off events. [2023-08-29 23:08:51,910 INFO L131 PetriNetUnfolder]: For 97015/97017 co-relation queries the response was YES. [2023-08-29 23:08:51,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29031 conditions, 2852 events. 1392/2852 cut-off events. For 97015/97017 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 20825 event pairs, 108 based on Foata normal form. 7/2854 useless extension candidates. Maximal degree in co-relation 28911. Up to 2471 conditions per place. [2023-08-29 23:08:51,944 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 480 selfloop transitions, 81 changer transitions 19/590 dead transitions. [2023-08-29 23:08:51,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 590 transitions, 14437 flow [2023-08-29 23:08:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:08:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:08:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2149 transitions. [2023-08-29 23:08:51,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088660578386606 [2023-08-29 23:08:51,947 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2149 transitions. [2023-08-29 23:08:51,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2149 transitions. [2023-08-29 23:08:51,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:51,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2149 transitions. [2023-08-29 23:08:51,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.08333333333334) internal successors, (2149), 12 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:51,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:51,953 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:51,953 INFO L175 Difference]: Start difference. First operand has 345 places, 533 transitions, 12728 flow. Second operand 12 states and 2149 transitions. [2023-08-29 23:08:51,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 590 transitions, 14437 flow [2023-08-29 23:08:52,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 590 transitions, 14151 flow, removed 143 selfloop flow, removed 2 redundant places. [2023-08-29 23:08:52,887 INFO L231 Difference]: Finished difference. Result has 358 places, 538 transitions, 12853 flow [2023-08-29 23:08:52,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12460, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12853, PETRI_PLACES=358, PETRI_TRANSITIONS=538} [2023-08-29 23:08:52,887 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 329 predicate places. [2023-08-29 23:08:52,888 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 538 transitions, 12853 flow [2023-08-29 23:08:52,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 175.2) internal successors, (2628), 15 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:52,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:52,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:52,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-29 23:08:53,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-29 23:08:53,089 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:53,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash 18209984, now seen corresponding path program 34 times [2023-08-29 23:08:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:53,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135750335] [2023-08-29 23:08:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:53,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135750335] [2023-08-29 23:08:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135750335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:53,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124779233] [2023-08-29 23:08:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:08:53,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:53,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:53,524 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:53,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-29 23:08:53,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:08:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:08:53,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:53,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:54,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124779233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:54,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-29 23:08:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774468621] [2023-08-29 23:08:54,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:54,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:08:54,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:08:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:08:54,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:54,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 538 transitions, 12853 flow. Second operand has 18 states, 18 states have (on average 175.05555555555554) internal successors, (3151), 18 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:54,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:54,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:54,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:55,284 INFO L130 PetriNetUnfolder]: 1360/2762 cut-off events. [2023-08-29 23:08:55,285 INFO L131 PetriNetUnfolder]: For 90264/90266 co-relation queries the response was YES. [2023-08-29 23:08:55,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28057 conditions, 2762 events. 1360/2762 cut-off events. For 90264/90266 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19861 event pairs, 89 based on Foata normal form. 3/2760 useless extension candidates. Maximal degree in co-relation 27932. Up to 2267 conditions per place. [2023-08-29 23:08:55,318 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 464 selfloop transitions, 106 changer transitions 5/585 dead transitions. [2023-08-29 23:08:55,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 585 transitions, 14379 flow [2023-08-29 23:08:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:08:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:08:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1626 transitions. [2023-08-29 23:08:55,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124809741248097 [2023-08-29 23:08:55,326 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1626 transitions. [2023-08-29 23:08:55,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1626 transitions. [2023-08-29 23:08:55,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:55,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1626 transitions. [2023-08-29 23:08:55,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.66666666666666) internal successors, (1626), 9 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:55,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:55,331 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:55,331 INFO L175 Difference]: Start difference. First operand has 358 places, 538 transitions, 12853 flow. Second operand 9 states and 1626 transitions. [2023-08-29 23:08:55,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 585 transitions, 14379 flow [2023-08-29 23:08:56,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 585 transitions, 14053 flow, removed 133 selfloop flow, removed 4 redundant places. [2023-08-29 23:08:56,160 INFO L231 Difference]: Finished difference. Result has 362 places, 540 transitions, 12885 flow [2023-08-29 23:08:56,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12543, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12885, PETRI_PLACES=362, PETRI_TRANSITIONS=540} [2023-08-29 23:08:56,161 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 333 predicate places. [2023-08-29 23:08:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 540 transitions, 12885 flow [2023-08-29 23:08:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 175.05555555555554) internal successors, (3151), 18 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:56,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:56,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:56,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-29 23:08:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-29 23:08:56,367 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:56,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2135435222, now seen corresponding path program 35 times [2023-08-29 23:08:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284797016] [2023-08-29 23:08:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:56,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:56,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284797016] [2023-08-29 23:08:56,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284797016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229183684] [2023-08-29 23:08:56,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:08:56,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:56,764 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:56,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-29 23:08:56,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:08:56,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:08:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:08:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:57,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:08:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229183684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:08:57,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:08:57,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-29 23:08:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087077891] [2023-08-29 23:08:57,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:08:57,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:08:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:08:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:08:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:08:57,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:08:57,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 540 transitions, 12885 flow. Second operand has 16 states, 16 states have (on average 175.125) internal successors, (2802), 16 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:57,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:08:57,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:08:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:08:58,378 INFO L130 PetriNetUnfolder]: 1351/2734 cut-off events. [2023-08-29 23:08:58,379 INFO L131 PetriNetUnfolder]: For 92119/92121 co-relation queries the response was YES. [2023-08-29 23:08:58,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27679 conditions, 2734 events. 1351/2734 cut-off events. For 92119/92121 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19577 event pairs, 86 based on Foata normal form. 4/2733 useless extension candidates. Maximal degree in co-relation 27553. Up to 2339 conditions per place. [2023-08-29 23:08:58,406 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 475 selfloop transitions, 97 changer transitions 5/587 dead transitions. [2023-08-29 23:08:58,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 587 transitions, 14328 flow [2023-08-29 23:08:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:08:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:08:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-08-29 23:08:58,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40971357409713577 [2023-08-29 23:08:58,408 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-08-29 23:08:58,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-08-29 23:08:58,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:08:58,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-08-29 23:08:58,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.45454545454547) internal successors, (1974), 11 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,413 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:58,413 INFO L175 Difference]: Start difference. First operand has 362 places, 540 transitions, 12885 flow. Second operand 11 states and 1974 transitions. [2023-08-29 23:08:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 587 transitions, 14328 flow [2023-08-29 23:08:59,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 587 transitions, 14019 flow, removed 38 selfloop flow, removed 7 redundant places. [2023-08-29 23:08:59,209 INFO L231 Difference]: Finished difference. Result has 366 places, 545 transitions, 12910 flow [2023-08-29 23:08:59,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12584, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12910, PETRI_PLACES=366, PETRI_TRANSITIONS=545} [2023-08-29 23:08:59,210 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 337 predicate places. [2023-08-29 23:08:59,210 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 545 transitions, 12910 flow [2023-08-29 23:08:59,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.125) internal successors, (2802), 16 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:08:59,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:08:59,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:08:59,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-29 23:08:59,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:59,415 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:08:59,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:08:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2017600142, now seen corresponding path program 36 times [2023-08-29 23:08:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:08:59,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184334724] [2023-08-29 23:08:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:08:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:08:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:08:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:08:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:08:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184334724] [2023-08-29 23:08:59,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184334724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:08:59,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056126479] [2023-08-29 23:08:59,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:08:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:08:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:08:59,785 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:08:59,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-29 23:08:59,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:08:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:08:59,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:08:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:00,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:00,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056126479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:00,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:00,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-29 23:09:00,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76355772] [2023-08-29 23:09:00,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:00,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:09:00,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:09:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:09:00,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:00,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 545 transitions, 12910 flow. Second operand has 19 states, 19 states have (on average 175.10526315789474) internal successors, (3327), 19 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:00,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:00,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:00,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:01,615 INFO L130 PetriNetUnfolder]: 1427/2920 cut-off events. [2023-08-29 23:09:01,615 INFO L131 PetriNetUnfolder]: For 98000/98002 co-relation queries the response was YES. [2023-08-29 23:09:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29366 conditions, 2920 events. 1427/2920 cut-off events. For 98000/98002 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 21382 event pairs, 114 based on Foata normal form. 4/2919 useless extension candidates. Maximal degree in co-relation 29240. Up to 2592 conditions per place. [2023-08-29 23:09:01,645 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 515 selfloop transitions, 91 changer transitions 9/625 dead transitions. [2023-08-29 23:09:01,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 625 transitions, 15394 flow [2023-08-29 23:09:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:09:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:09:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1619 transitions. [2023-08-29 23:09:01,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41070522577371893 [2023-08-29 23:09:01,647 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1619 transitions. [2023-08-29 23:09:01,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1619 transitions. [2023-08-29 23:09:01,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:01,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1619 transitions. [2023-08-29 23:09:01,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.88888888888889) internal successors, (1619), 9 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:01,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:01,650 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:01,651 INFO L175 Difference]: Start difference. First operand has 366 places, 545 transitions, 12910 flow. Second operand 9 states and 1619 transitions. [2023-08-29 23:09:01,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 625 transitions, 15394 flow [2023-08-29 23:09:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 625 transitions, 15203 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-08-29 23:09:02,440 INFO L231 Difference]: Finished difference. Result has 369 places, 578 transitions, 13779 flow [2023-08-29 23:09:02,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12727, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13779, PETRI_PLACES=369, PETRI_TRANSITIONS=578} [2023-08-29 23:09:02,440 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 340 predicate places. [2023-08-29 23:09:02,441 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 578 transitions, 13779 flow [2023-08-29 23:09:02,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 175.10526315789474) internal successors, (3327), 19 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:02,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:02,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:02,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:02,642 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:02,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1071783608, now seen corresponding path program 37 times [2023-08-29 23:09:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:02,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099612012] [2023-08-29 23:09:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:02,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:03,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099612012] [2023-08-29 23:09:03,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099612012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544267439] [2023-08-29 23:09:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:09:03,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:03,017 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:03,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-29 23:09:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:03,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:03,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544267439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:03,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:03,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-29 23:09:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998112640] [2023-08-29 23:09:03,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:03,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:09:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:09:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:09:03,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:03,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 578 transitions, 13779 flow. Second operand has 19 states, 19 states have (on average 175.0) internal successors, (3325), 19 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:03,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:03,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:03,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:04,976 INFO L130 PetriNetUnfolder]: 1421/2886 cut-off events. [2023-08-29 23:09:04,976 INFO L131 PetriNetUnfolder]: For 98262/98264 co-relation queries the response was YES. [2023-08-29 23:09:04,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29346 conditions, 2886 events. 1421/2886 cut-off events. For 98262/98264 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 20936 event pairs, 115 based on Foata normal form. 4/2885 useless extension candidates. Maximal degree in co-relation 29218. Up to 2592 conditions per place. [2023-08-29 23:09:05,010 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 508 selfloop transitions, 91 changer transitions 6/615 dead transitions. [2023-08-29 23:09:05,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 615 transitions, 15362 flow [2023-08-29 23:09:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:09:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:09:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1440 transitions. [2023-08-29 23:09:05,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410958904109589 [2023-08-29 23:09:05,012 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1440 transitions. [2023-08-29 23:09:05,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1440 transitions. [2023-08-29 23:09:05,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:05,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1440 transitions. [2023-08-29 23:09:05,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:05,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:05,015 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 438.0) internal successors, (3942), 9 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:05,015 INFO L175 Difference]: Start difference. First operand has 369 places, 578 transitions, 13779 flow. Second operand 8 states and 1440 transitions. [2023-08-29 23:09:05,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 615 transitions, 15362 flow [2023-08-29 23:09:05,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 615 transitions, 15170 flow, removed 43 selfloop flow, removed 5 redundant places. [2023-08-29 23:09:05,972 INFO L231 Difference]: Finished difference. Result has 372 places, 581 transitions, 13947 flow [2023-08-29 23:09:05,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=13593, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13947, PETRI_PLACES=372, PETRI_TRANSITIONS=581} [2023-08-29 23:09:05,973 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 343 predicate places. [2023-08-29 23:09:05,973 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 581 transitions, 13947 flow [2023-08-29 23:09:05,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 175.0) internal successors, (3325), 19 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:05,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:05,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:05,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-29 23:09:06,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-29 23:09:06,176 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:06,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2027114478, now seen corresponding path program 38 times [2023-08-29 23:09:06,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:06,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943510848] [2023-08-29 23:09:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:06,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:06,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943510848] [2023-08-29 23:09:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943510848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476116235] [2023-08-29 23:09:06,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:09:06,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:06,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:06,553 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:06,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-29 23:09:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:09:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:07,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476116235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:07,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:07,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2023-08-29 23:09:07,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524662200] [2023-08-29 23:09:07,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:07,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:09:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:09:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:09:07,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:07,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 581 transitions, 13947 flow. Second operand has 16 states, 16 states have (on average 175.3125) internal successors, (2805), 16 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:07,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:07,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:07,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:08,115 INFO L130 PetriNetUnfolder]: 1409/2850 cut-off events. [2023-08-29 23:09:08,115 INFO L131 PetriNetUnfolder]: For 98462/98464 co-relation queries the response was YES. [2023-08-29 23:09:08,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29175 conditions, 2850 events. 1409/2850 cut-off events. For 98462/98464 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 20541 event pairs, 118 based on Foata normal form. 4/2849 useless extension candidates. Maximal degree in co-relation 29046. Up to 2641 conditions per place. [2023-08-29 23:09:08,149 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 525 selfloop transitions, 72 changer transitions 7/614 dead transitions. [2023-08-29 23:09:08,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 614 transitions, 15441 flow [2023-08-29 23:09:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:09:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:09:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1610 transitions. [2023-08-29 23:09:08,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40842212075088785 [2023-08-29 23:09:08,151 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1610 transitions. [2023-08-29 23:09:08,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1610 transitions. [2023-08-29 23:09:08,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:08,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1610 transitions. [2023-08-29 23:09:08,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.88888888888889) internal successors, (1610), 9 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:08,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:08,154 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:08,155 INFO L175 Difference]: Start difference. First operand has 372 places, 581 transitions, 13947 flow. Second operand 9 states and 1610 transitions. [2023-08-29 23:09:08,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 614 transitions, 15441 flow [2023-08-29 23:09:09,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 614 transitions, 15157 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-08-29 23:09:09,064 INFO L231 Difference]: Finished difference. Result has 378 places, 585 transitions, 14012 flow [2023-08-29 23:09:09,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=13705, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14012, PETRI_PLACES=378, PETRI_TRANSITIONS=585} [2023-08-29 23:09:09,065 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2023-08-29 23:09:09,065 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 585 transitions, 14012 flow [2023-08-29 23:09:09,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.3125) internal successors, (2805), 16 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:09,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:09,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:09,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:09,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:09,266 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:09,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash -699295512, now seen corresponding path program 39 times [2023-08-29 23:09:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:09,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685638995] [2023-08-29 23:09:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:09,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:09,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685638995] [2023-08-29 23:09:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685638995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157904003] [2023-08-29 23:09:09,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:09:09,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:09,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:09,621 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:09,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-29 23:09:09,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:09:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:09,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:10,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157904003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:10,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:10,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-29 23:09:10,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787788788] [2023-08-29 23:09:10,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:10,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:09:10,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:09:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:09:10,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:10,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 585 transitions, 14012 flow. Second operand has 20 states, 20 states have (on average 175.0) internal successors, (3500), 20 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:10,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:10,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:10,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:11,643 INFO L130 PetriNetUnfolder]: 1617/3314 cut-off events. [2023-08-29 23:09:11,643 INFO L131 PetriNetUnfolder]: For 118596/118598 co-relation queries the response was YES. [2023-08-29 23:09:11,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33672 conditions, 3314 events. 1617/3314 cut-off events. For 118596/118598 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 24972 event pairs, 131 based on Foata normal form. 6/3315 useless extension candidates. Maximal degree in co-relation 33541. Up to 2721 conditions per place. [2023-08-29 23:09:11,675 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 605 selfloop transitions, 129 changer transitions 15/759 dead transitions. [2023-08-29 23:09:11,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 759 transitions, 18686 flow [2023-08-29 23:09:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:09:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:09:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1985 transitions. [2023-08-29 23:09:11,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119966791199668 [2023-08-29 23:09:11,677 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1985 transitions. [2023-08-29 23:09:11,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1985 transitions. [2023-08-29 23:09:11,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:11,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1985 transitions. [2023-08-29 23:09:11,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 180.45454545454547) internal successors, (1985), 11 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:11,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:11,682 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:11,682 INFO L175 Difference]: Start difference. First operand has 378 places, 585 transitions, 14012 flow. Second operand 11 states and 1985 transitions. [2023-08-29 23:09:11,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 759 transitions, 18686 flow [2023-08-29 23:09:12,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 759 transitions, 18442 flow, removed 44 selfloop flow, removed 7 redundant places. [2023-08-29 23:09:12,624 INFO L231 Difference]: Finished difference. Result has 389 places, 668 transitions, 16312 flow [2023-08-29 23:09:12,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=13782, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16312, PETRI_PLACES=389, PETRI_TRANSITIONS=668} [2023-08-29 23:09:12,625 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 360 predicate places. [2023-08-29 23:09:12,625 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 668 transitions, 16312 flow [2023-08-29 23:09:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 175.0) internal successors, (3500), 20 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:12,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:12,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:12,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-08-29 23:09:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-29 23:09:12,826 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:12,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash -911555066, now seen corresponding path program 40 times [2023-08-29 23:09:12,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:12,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110535335] [2023-08-29 23:09:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110535335] [2023-08-29 23:09:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110535335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972633063] [2023-08-29 23:09:13,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:09:13,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:13,167 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:13,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-29 23:09:13,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:09:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:13,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:13,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972633063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:13,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:13,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-29 23:09:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915939954] [2023-08-29 23:09:13,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:09:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:09:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:09:13,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:13,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 668 transitions, 16312 flow. Second operand has 17 states, 17 states have (on average 175.2941176470588) internal successors, (2980), 17 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:13,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:13,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:13,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:15,159 INFO L130 PetriNetUnfolder]: 1741/3587 cut-off events. [2023-08-29 23:09:15,160 INFO L131 PetriNetUnfolder]: For 134593/134595 co-relation queries the response was YES. [2023-08-29 23:09:15,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37136 conditions, 3587 events. 1741/3587 cut-off events. For 134593/134595 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27619 event pairs, 141 based on Foata normal form. 5/3587 useless extension candidates. Maximal degree in co-relation 36997. Up to 3074 conditions per place. [2023-08-29 23:09:15,200 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 646 selfloop transitions, 113 changer transitions 7/776 dead transitions. [2023-08-29 23:09:15,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 776 transitions, 19812 flow [2023-08-29 23:09:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:09:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:09:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1624 transitions. [2023-08-29 23:09:15,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119736174530695 [2023-08-29 23:09:15,202 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1624 transitions. [2023-08-29 23:09:15,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1624 transitions. [2023-08-29 23:09:15,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:15,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1624 transitions. [2023-08-29 23:09:15,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.44444444444446) internal successors, (1624), 9 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,205 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:15,205 INFO L175 Difference]: Start difference. First operand has 389 places, 668 transitions, 16312 flow. Second operand 9 states and 1624 transitions. [2023-08-29 23:09:15,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 776 transitions, 19812 flow [2023-08-29 23:09:16,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 776 transitions, 19397 flow, removed 206 selfloop flow, removed 3 redundant places. [2023-08-29 23:09:16,496 INFO L231 Difference]: Finished difference. Result has 396 places, 713 transitions, 17482 flow [2023-08-29 23:09:16,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=15917, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17482, PETRI_PLACES=396, PETRI_TRANSITIONS=713} [2023-08-29 23:09:16,496 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 367 predicate places. [2023-08-29 23:09:16,496 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 713 transitions, 17482 flow [2023-08-29 23:09:16,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.2941176470588) internal successors, (2980), 17 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:16,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:16,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:16,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-08-29 23:09:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:16,698 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:16,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash 506288034, now seen corresponding path program 41 times [2023-08-29 23:09:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:16,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333396789] [2023-08-29 23:09:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333396789] [2023-08-29 23:09:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333396789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644811009] [2023-08-29 23:09:17,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:09:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:17,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:17,051 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:17,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-29 23:09:17,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:09:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:17,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644811009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:17,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-29 23:09:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228023190] [2023-08-29 23:09:17,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:17,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:09:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:17,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:09:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:09:17,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:17,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 713 transitions, 17482 flow. Second operand has 19 states, 19 states have (on average 174.94736842105263) internal successors, (3324), 19 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:17,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:17,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:17,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:19,182 INFO L130 PetriNetUnfolder]: 1736/3551 cut-off events. [2023-08-29 23:09:19,182 INFO L131 PetriNetUnfolder]: For 135962/135964 co-relation queries the response was YES. [2023-08-29 23:09:19,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37173 conditions, 3551 events. 1736/3551 cut-off events. For 135962/135964 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 27070 event pairs, 159 based on Foata normal form. 6/3552 useless extension candidates. Maximal degree in co-relation 37032. Up to 3009 conditions per place. [2023-08-29 23:09:19,219 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 638 selfloop transitions, 125 changer transitions 16/789 dead transitions. [2023-08-29 23:09:19,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 789 transitions, 20114 flow [2023-08-29 23:09:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:09:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:09:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1977 transitions. [2023-08-29 23:09:19,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41033623910336237 [2023-08-29 23:09:19,221 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1977 transitions. [2023-08-29 23:09:19,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1977 transitions. [2023-08-29 23:09:19,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:19,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1977 transitions. [2023-08-29 23:09:19,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.72727272727272) internal successors, (1977), 11 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:19,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:19,224 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:19,224 INFO L175 Difference]: Start difference. First operand has 396 places, 713 transitions, 17482 flow. Second operand 11 states and 1977 transitions. [2023-08-29 23:09:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 789 transitions, 20114 flow [2023-08-29 23:09:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 789 transitions, 19771 flow, removed 109 selfloop flow, removed 4 redundant places. [2023-08-29 23:09:20,461 INFO L231 Difference]: Finished difference. Result has 405 places, 710 transitions, 17463 flow [2023-08-29 23:09:20,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17149, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17463, PETRI_PLACES=405, PETRI_TRANSITIONS=710} [2023-08-29 23:09:20,462 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 376 predicate places. [2023-08-29 23:09:20,462 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 710 transitions, 17463 flow [2023-08-29 23:09:20,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 174.94736842105263) internal successors, (3324), 19 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:20,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:20,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:20,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-29 23:09:20,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:20,663 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:20,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 679729750, now seen corresponding path program 42 times [2023-08-29 23:09:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:20,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112184392] [2023-08-29 23:09:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:20,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:20,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112184392] [2023-08-29 23:09:20,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112184392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:20,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035033952] [2023-08-29 23:09:20,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:09:20,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:20,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:21,001 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:21,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-29 23:09:21,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-29 23:09:21,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:21,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:21,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035033952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:21,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:21,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-29 23:09:21,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083288429] [2023-08-29 23:09:21,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:21,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:09:21,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:09:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:09:21,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:21,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 710 transitions, 17463 flow. Second operand has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:21,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:21,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:21,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:23,012 INFO L130 PetriNetUnfolder]: 1720/3507 cut-off events. [2023-08-29 23:09:23,012 INFO L131 PetriNetUnfolder]: For 133418/133420 co-relation queries the response was YES. [2023-08-29 23:09:23,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36798 conditions, 3507 events. 1720/3507 cut-off events. For 133418/133420 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26566 event pairs, 157 based on Foata normal form. 6/3508 useless extension candidates. Maximal degree in co-relation 36654. Up to 3090 conditions per place. [2023-08-29 23:09:23,053 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 639 selfloop transitions, 122 changer transitions 15/786 dead transitions. [2023-08-29 23:09:23,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 786 transitions, 20093 flow [2023-08-29 23:09:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:09:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:09:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2151 transitions. [2023-08-29 23:09:23,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092465753424658 [2023-08-29 23:09:23,055 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2151 transitions. [2023-08-29 23:09:23,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2151 transitions. [2023-08-29 23:09:23,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:23,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2151 transitions. [2023-08-29 23:09:23,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 179.25) internal successors, (2151), 12 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:23,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:23,059 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:23,059 INFO L175 Difference]: Start difference. First operand has 405 places, 710 transitions, 17463 flow. Second operand 12 states and 2151 transitions. [2023-08-29 23:09:23,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 786 transitions, 20093 flow [2023-08-29 23:09:24,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 786 transitions, 19635 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-08-29 23:09:24,411 INFO L231 Difference]: Finished difference. Result has 410 places, 723 transitions, 17705 flow [2023-08-29 23:09:24,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17085, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17705, PETRI_PLACES=410, PETRI_TRANSITIONS=723} [2023-08-29 23:09:24,412 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 381 predicate places. [2023-08-29 23:09:24,412 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 723 transitions, 17705 flow [2023-08-29 23:09:24,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:24,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:24,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:24,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:24,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-29 23:09:24,613 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:24,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1590629470, now seen corresponding path program 43 times [2023-08-29 23:09:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:24,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132481124] [2023-08-29 23:09:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:24,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132481124] [2023-08-29 23:09:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132481124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5001351] [2023-08-29 23:09:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:09:24,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:24,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:24,981 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:25,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-29 23:09:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:25,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:25,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5001351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:25,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:25,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-29 23:09:25,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509614678] [2023-08-29 23:09:25,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:25,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:09:25,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:09:25,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:09:25,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:25,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 723 transitions, 17705 flow. Second operand has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:25,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:25,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:25,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:27,078 INFO L130 PetriNetUnfolder]: 1710/3460 cut-off events. [2023-08-29 23:09:27,078 INFO L131 PetriNetUnfolder]: For 127078/127080 co-relation queries the response was YES. [2023-08-29 23:09:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36257 conditions, 3460 events. 1710/3460 cut-off events. For 127078/127080 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 25890 event pairs, 159 based on Foata normal form. 3/3458 useless extension candidates. Maximal degree in co-relation 36110. Up to 3167 conditions per place. [2023-08-29 23:09:27,113 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 654 selfloop transitions, 102 changer transitions 5/771 dead transitions. [2023-08-29 23:09:27,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 771 transitions, 19711 flow [2023-08-29 23:09:27,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:09:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:09:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1967 transitions. [2023-08-29 23:09:27,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082606890826069 [2023-08-29 23:09:27,115 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1967 transitions. [2023-08-29 23:09:27,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1967 transitions. [2023-08-29 23:09:27,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:27,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1967 transitions. [2023-08-29 23:09:27,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.8181818181818) internal successors, (1967), 11 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:27,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:27,119 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 438.0) internal successors, (5256), 12 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:27,119 INFO L175 Difference]: Start difference. First operand has 410 places, 723 transitions, 17705 flow. Second operand 11 states and 1967 transitions. [2023-08-29 23:09:27,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 771 transitions, 19711 flow [2023-08-29 23:09:28,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 771 transitions, 19433 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-29 23:09:28,292 INFO L231 Difference]: Finished difference. Result has 416 places, 735 transitions, 17991 flow [2023-08-29 23:09:28,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17441, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17991, PETRI_PLACES=416, PETRI_TRANSITIONS=735} [2023-08-29 23:09:28,293 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 387 predicate places. [2023-08-29 23:09:28,293 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 735 transitions, 17991 flow [2023-08-29 23:09:28,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 175.25) internal successors, (2804), 16 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:28,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:28,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:28,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-29 23:09:28,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-29 23:09:28,494 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:28,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:28,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1883713578, now seen corresponding path program 44 times [2023-08-29 23:09:28,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094536323] [2023-08-29 23:09:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:28,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:28,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094536323] [2023-08-29 23:09:28,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094536323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:28,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482137558] [2023-08-29 23:09:28,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:09:28,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:28,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:28,827 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:28,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-29 23:09:28,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:09:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:29,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482137558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:29,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-29 23:09:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254943540] [2023-08-29 23:09:29,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:09:29,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:09:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:09:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:29,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 735 transitions, 17991 flow. Second operand has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:29,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:29,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:29,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:30,778 INFO L130 PetriNetUnfolder]: 1707/3437 cut-off events. [2023-08-29 23:09:30,778 INFO L131 PetriNetUnfolder]: For 126696/126698 co-relation queries the response was YES. [2023-08-29 23:09:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 3437 events. 1707/3437 cut-off events. For 126696/126698 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 25593 event pairs, 136 based on Foata normal form. 5/3437 useless extension candidates. Maximal degree in co-relation 35933. Up to 3136 conditions per place. [2023-08-29 23:09:30,817 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 671 selfloop transitions, 81 changer transitions 7/769 dead transitions. [2023-08-29 23:09:30,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 769 transitions, 19806 flow [2023-08-29 23:09:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:09:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:09:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1611 transitions. [2023-08-29 23:09:30,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408675799086758 [2023-08-29 23:09:30,819 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1611 transitions. [2023-08-29 23:09:30,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1611 transitions. [2023-08-29 23:09:30,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:30,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1611 transitions. [2023-08-29 23:09:30,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:30,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:30,823 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:30,823 INFO L175 Difference]: Start difference. First operand has 416 places, 735 transitions, 17991 flow. Second operand 9 states and 1611 transitions. [2023-08-29 23:09:30,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 769 transitions, 19806 flow [2023-08-29 23:09:32,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 769 transitions, 19525 flow, removed 58 selfloop flow, removed 7 redundant places. [2023-08-29 23:09:32,134 INFO L231 Difference]: Finished difference. Result has 418 places, 738 transitions, 18035 flow [2023-08-29 23:09:32,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17714, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18035, PETRI_PLACES=418, PETRI_TRANSITIONS=738} [2023-08-29 23:09:32,136 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 389 predicate places. [2023-08-29 23:09:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 738 transitions, 18035 flow [2023-08-29 23:09:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:32,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:32,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:32,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-29 23:09:32,343 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:32,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:32,343 INFO L85 PathProgramCache]: Analyzing trace with hash 294028480, now seen corresponding path program 45 times [2023-08-29 23:09:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:32,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779744685] [2023-08-29 23:09:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:32,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779744685] [2023-08-29 23:09:32,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779744685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641498965] [2023-08-29 23:09:32,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:09:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:32,621 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:32,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-29 23:09:32,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:09:32,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-29 23:09:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:32,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:33,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641498965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:33,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:33,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-29 23:09:33,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846804136] [2023-08-29 23:09:33,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:33,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:09:33,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:09:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:09:33,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 438 [2023-08-29 23:09:33,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 738 transitions, 18035 flow. Second operand has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:33,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:33,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 438 [2023-08-29 23:09:33,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:34,472 INFO L130 PetriNetUnfolder]: 1692/3392 cut-off events. [2023-08-29 23:09:34,472 INFO L131 PetriNetUnfolder]: For 126496/126498 co-relation queries the response was YES. [2023-08-29 23:09:34,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35700 conditions, 3392 events. 1692/3392 cut-off events. For 126496/126498 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25088 event pairs, 124 based on Foata normal form. 5/3392 useless extension candidates. Maximal degree in co-relation 35551. Up to 3025 conditions per place. [2023-08-29 23:09:34,514 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 652 selfloop transitions, 102 changer transitions 9/773 dead transitions. [2023-08-29 23:09:34,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 773 transitions, 19797 flow [2023-08-29 23:09:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:09:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:09:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1616 transitions. [2023-08-29 23:09:34,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40994419076610855 [2023-08-29 23:09:34,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1616 transitions. [2023-08-29 23:09:34,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1616 transitions. [2023-08-29 23:09:34,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:34,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1616 transitions. [2023-08-29 23:09:34,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.55555555555554) internal successors, (1616), 9 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:34,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:34,518 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:34,518 INFO L175 Difference]: Start difference. First operand has 418 places, 738 transitions, 18035 flow. Second operand 9 states and 1616 transitions. [2023-08-29 23:09:34,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 773 transitions, 19797 flow [2023-08-29 23:09:35,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 773 transitions, 19481 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-08-29 23:09:35,796 INFO L231 Difference]: Finished difference. Result has 420 places, 738 transitions, 17995 flow [2023-08-29 23:09:35,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17723, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17995, PETRI_PLACES=420, PETRI_TRANSITIONS=738} [2023-08-29 23:09:35,797 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 391 predicate places. [2023-08-29 23:09:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 738 transitions, 17995 flow [2023-08-29 23:09:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 175.11764705882354) internal successors, (2977), 17 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:35,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:35,797 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:35,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-08-29 23:09:35,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:35,998 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:35,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2026140096, now seen corresponding path program 46 times [2023-08-29 23:09:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893896310] [2023-08-29 23:09:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:36,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893896310] [2023-08-29 23:09:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893896310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071081913] [2023-08-29 23:09:36,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:09:36,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:36,073 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:36,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-29 23:09:36,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:09:36,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:36,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:09:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:36,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071081913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:36,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:36,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-29 23:09:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581799494] [2023-08-29 23:09:36,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:09:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:09:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:09:36,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:09:36,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 738 transitions, 17995 flow. Second operand has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:36,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:36,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:09:36,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:37,820 INFO L130 PetriNetUnfolder]: 2248/4521 cut-off events. [2023-08-29 23:09:37,820 INFO L131 PetriNetUnfolder]: For 176783/176783 co-relation queries the response was YES. [2023-08-29 23:09:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47225 conditions, 4521 events. 2248/4521 cut-off events. For 176783/176783 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35174 event pairs, 194 based on Foata normal form. 36/4557 useless extension candidates. Maximal degree in co-relation 47075. Up to 2645 conditions per place. [2023-08-29 23:09:37,877 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 751 selfloop transitions, 266 changer transitions 0/1017 dead transitions. [2023-08-29 23:09:37,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1017 transitions, 26523 flow [2023-08-29 23:09:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:09:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:09:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1695 transitions. [2023-08-29 23:09:37,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299847792998478 [2023-08-29 23:09:37,879 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1695 transitions. [2023-08-29 23:09:37,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1695 transitions. [2023-08-29 23:09:37,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:37,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1695 transitions. [2023-08-29 23:09:37,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 188.33333333333334) internal successors, (1695), 9 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:37,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:37,882 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:37,882 INFO L175 Difference]: Start difference. First operand has 420 places, 738 transitions, 17995 flow. Second operand 9 states and 1695 transitions. [2023-08-29 23:09:37,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1017 transitions, 26523 flow [2023-08-29 23:09:39,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1017 transitions, 26282 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-08-29 23:09:39,834 INFO L231 Difference]: Finished difference. Result has 426 places, 855 transitions, 21922 flow [2023-08-29 23:09:39,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=17811, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21922, PETRI_PLACES=426, PETRI_TRANSITIONS=855} [2023-08-29 23:09:39,835 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 397 predicate places. [2023-08-29 23:09:39,835 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 855 transitions, 21922 flow [2023-08-29 23:09:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:39,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:39,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:39,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:40,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-29 23:09:40,036 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:40,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2007048997, now seen corresponding path program 47 times [2023-08-29 23:09:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:40,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706279128] [2023-08-29 23:09:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:40,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706279128] [2023-08-29 23:09:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706279128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:40,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287256802] [2023-08-29 23:09:40,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:09:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:40,115 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:40,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-29 23:09:40,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:09:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:09:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:40,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287256802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:40,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:40,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-29 23:09:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584207980] [2023-08-29 23:09:40,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:09:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:40,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:09:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:09:40,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:09:40,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 855 transitions, 21922 flow. Second operand has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:40,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:40,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:09:40,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:42,419 INFO L130 PetriNetUnfolder]: 2253/4538 cut-off events. [2023-08-29 23:09:42,419 INFO L131 PetriNetUnfolder]: For 184103/184103 co-relation queries the response was YES. [2023-08-29 23:09:42,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48409 conditions, 4538 events. 2253/4538 cut-off events. For 184103/184103 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 35184 event pairs, 376 based on Foata normal form. 4/4542 useless extension candidates. Maximal degree in co-relation 48255. Up to 1744 conditions per place. [2023-08-29 23:09:42,472 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 603 selfloop transitions, 403 changer transitions 15/1021 dead transitions. [2023-08-29 23:09:42,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1021 transitions, 27454 flow [2023-08-29 23:09:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:09:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:09:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2609 transitions. [2023-08-29 23:09:42,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254729288975864 [2023-08-29 23:09:42,474 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2609 transitions. [2023-08-29 23:09:42,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2609 transitions. [2023-08-29 23:09:42,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:42,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2609 transitions. [2023-08-29 23:09:42,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.35714285714286) internal successors, (2609), 14 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,479 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:42,479 INFO L175 Difference]: Start difference. First operand has 426 places, 855 transitions, 21922 flow. Second operand 14 states and 2609 transitions. [2023-08-29 23:09:42,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1021 transitions, 27454 flow [2023-08-29 23:09:44,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1021 transitions, 27225 flow, removed 46 selfloop flow, removed 3 redundant places. [2023-08-29 23:09:44,305 INFO L231 Difference]: Finished difference. Result has 441 places, 919 transitions, 24667 flow [2023-08-29 23:09:44,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=21693, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24667, PETRI_PLACES=441, PETRI_TRANSITIONS=919} [2023-08-29 23:09:44,305 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 412 predicate places. [2023-08-29 23:09:44,306 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 919 transitions, 24667 flow [2023-08-29 23:09:44,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.07142857142858) internal successors, (2563), 14 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:44,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:44,306 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:44,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:44,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:44,507 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:44,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1466421474, now seen corresponding path program 48 times [2023-08-29 23:09:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:44,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953963171] [2023-08-29 23:09:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:44,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:44,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953963171] [2023-08-29 23:09:44,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953963171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266253951] [2023-08-29 23:09:44,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:09:44,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:44,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:44,601 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:44,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-29 23:09:44,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:09:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:09:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:44,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:44,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266253951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:44,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:44,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-29 23:09:44,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097762377] [2023-08-29 23:09:44,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:44,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:09:44,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:09:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:09:44,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:09:44,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 919 transitions, 24667 flow. Second operand has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:44,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:44,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:09:44,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:47,092 INFO L130 PetriNetUnfolder]: 2489/5028 cut-off events. [2023-08-29 23:09:47,092 INFO L131 PetriNetUnfolder]: For 238585/238585 co-relation queries the response was YES. [2023-08-29 23:09:47,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55901 conditions, 5028 events. 2489/5028 cut-off events. For 238585/238585 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40192 event pairs, 176 based on Foata normal form. 62/5090 useless extension candidates. Maximal degree in co-relation 55742. Up to 3409 conditions per place. [2023-08-29 23:09:47,161 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 788 selfloop transitions, 311 changer transitions 0/1099 dead transitions. [2023-08-29 23:09:47,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1099 transitions, 30569 flow [2023-08-29 23:09:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 23:09:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 23:09:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4127 transitions. [2023-08-29 23:09:47,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42828974678289744 [2023-08-29 23:09:47,163 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4127 transitions. [2023-08-29 23:09:47,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4127 transitions. [2023-08-29 23:09:47,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:47,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4127 transitions. [2023-08-29 23:09:47,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 187.5909090909091) internal successors, (4127), 22 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:47,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:47,170 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:47,170 INFO L175 Difference]: Start difference. First operand has 441 places, 919 transitions, 24667 flow. Second operand 22 states and 4127 transitions. [2023-08-29 23:09:47,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1099 transitions, 30569 flow [2023-08-29 23:09:49,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1099 transitions, 29671 flow, removed 258 selfloop flow, removed 8 redundant places. [2023-08-29 23:09:49,712 INFO L231 Difference]: Finished difference. Result has 460 places, 995 transitions, 26815 flow [2023-08-29 23:09:49,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=23780, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=26815, PETRI_PLACES=460, PETRI_TRANSITIONS=995} [2023-08-29 23:09:49,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 431 predicate places. [2023-08-29 23:09:49,714 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 995 transitions, 26815 flow [2023-08-29 23:09:49,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:49,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:49,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:49,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-29 23:09:49,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:49,915 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:49,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:49,916 INFO L85 PathProgramCache]: Analyzing trace with hash 335477113, now seen corresponding path program 49 times [2023-08-29 23:09:49,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:49,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434222381] [2023-08-29 23:09:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:49,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:49,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:49,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434222381] [2023-08-29 23:09:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434222381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720194238] [2023-08-29 23:09:49,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:09:49,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:49,984 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:49,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-29 23:09:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:09:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:50,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720194238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:50,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-29 23:09:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840754138] [2023-08-29 23:09:50,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:09:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:09:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:09:50,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:09:50,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 995 transitions, 26815 flow. Second operand has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:50,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:50,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:09:50,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:52,737 INFO L130 PetriNetUnfolder]: 2497/5086 cut-off events. [2023-08-29 23:09:52,737 INFO L131 PetriNetUnfolder]: For 243454/243454 co-relation queries the response was YES. [2023-08-29 23:09:52,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57438 conditions, 5086 events. 2497/5086 cut-off events. For 243454/243454 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40971 event pairs, 410 based on Foata normal form. 24/5110 useless extension candidates. Maximal degree in co-relation 57272. Up to 2082 conditions per place. [2023-08-29 23:09:52,805 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 650 selfloop transitions, 473 changer transitions 12/1135 dead transitions. [2023-08-29 23:09:52,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1135 transitions, 31289 flow [2023-08-29 23:09:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-29 23:09:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-29 23:09:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4837 transitions. [2023-08-29 23:09:52,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42474534597822267 [2023-08-29 23:09:52,808 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4837 transitions. [2023-08-29 23:09:52,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4837 transitions. [2023-08-29 23:09:52,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:52,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4837 transitions. [2023-08-29 23:09:52,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 186.03846153846155) internal successors, (4837), 26 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:52,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:52,815 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:52,816 INFO L175 Difference]: Start difference. First operand has 460 places, 995 transitions, 26815 flow. Second operand 26 states and 4837 transitions. [2023-08-29 23:09:52,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1135 transitions, 31289 flow [2023-08-29 23:09:55,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1135 transitions, 30336 flow, removed 338 selfloop flow, removed 11 redundant places. [2023-08-29 23:09:55,564 INFO L231 Difference]: Finished difference. Result has 479 places, 1008 transitions, 27451 flow [2023-08-29 23:09:55,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=25837, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=27451, PETRI_PLACES=479, PETRI_TRANSITIONS=1008} [2023-08-29 23:09:55,565 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 450 predicate places. [2023-08-29 23:09:55,565 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1008 transitions, 27451 flow [2023-08-29 23:09:55,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:55,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:09:55,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:09:55,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-29 23:09:55,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:55,772 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:09:55,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:09:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash -512809607, now seen corresponding path program 50 times [2023-08-29 23:09:55,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:09:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247443752] [2023-08-29 23:09:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:09:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:09:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:09:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:55,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:09:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247443752] [2023-08-29 23:09:55,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247443752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:09:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704269829] [2023-08-29 23:09:55,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:09:55,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:09:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:09:55,866 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:09:55,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-29 23:09:56,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:09:56,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:09:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:09:56,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:09:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:56,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:09:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:09:56,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704269829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:09:56,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:09:56,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-29 23:09:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116362219] [2023-08-29 23:09:56,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:09:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:09:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:09:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:09:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:09:56,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:09:56,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1008 transitions, 27451 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:56,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:09:56,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:09:56,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:09:59,485 INFO L130 PetriNetUnfolder]: 2844/5787 cut-off events. [2023-08-29 23:09:59,485 INFO L131 PetriNetUnfolder]: For 317521/317521 co-relation queries the response was YES. [2023-08-29 23:09:59,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67123 conditions, 5787 events. 2844/5787 cut-off events. For 317521/317521 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 47639 event pairs, 351 based on Foata normal form. 64/5851 useless extension candidates. Maximal degree in co-relation 66954. Up to 1725 conditions per place. [2023-08-29 23:09:59,593 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 672 selfloop transitions, 608 changer transitions 8/1288 dead transitions. [2023-08-29 23:09:59,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1288 transitions, 35871 flow [2023-08-29 23:09:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-29 23:09:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-29 23:09:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5781 transitions. [2023-08-29 23:09:59,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257622624834291 [2023-08-29 23:09:59,596 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5781 transitions. [2023-08-29 23:09:59,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5781 transitions. [2023-08-29 23:09:59,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:09:59,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5781 transitions. [2023-08-29 23:09:59,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 186.48387096774192) internal successors, (5781), 31 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:59,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 438.0) internal successors, (14016), 32 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:59,605 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 438.0) internal successors, (14016), 32 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:09:59,605 INFO L175 Difference]: Start difference. First operand has 479 places, 1008 transitions, 27451 flow. Second operand 31 states and 5781 transitions. [2023-08-29 23:09:59,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1288 transitions, 35871 flow [2023-08-29 23:10:02,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1288 transitions, 35139 flow, removed 136 selfloop flow, removed 11 redundant places. [2023-08-29 23:10:02,696 INFO L231 Difference]: Finished difference. Result has 503 places, 1114 transitions, 31841 flow [2023-08-29 23:10:02,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=26241, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=31841, PETRI_PLACES=503, PETRI_TRANSITIONS=1114} [2023-08-29 23:10:02,697 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 474 predicate places. [2023-08-29 23:10:02,697 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1114 transitions, 31841 flow [2023-08-29 23:10:02,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:02,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:02,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:02,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:02,904 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:02,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1490593063, now seen corresponding path program 51 times [2023-08-29 23:10:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:02,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057331488] [2023-08-29 23:10:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:02,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057331488] [2023-08-29 23:10:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057331488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63096145] [2023-08-29 23:10:03,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:10:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:03,010 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:03,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-29 23:10:03,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:10:03,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:03,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63096145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:03,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:03,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-29 23:10:03,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543477587] [2023-08-29 23:10:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:03,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:10:03,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:10:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:10:03,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:03,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1114 transitions, 31841 flow. Second operand has 15 states, 15 states have (on average 182.93333333333334) internal successors, (2744), 15 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:03,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:03,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:03,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:06,622 INFO L130 PetriNetUnfolder]: 2972/6033 cut-off events. [2023-08-29 23:10:06,623 INFO L131 PetriNetUnfolder]: For 371413/371413 co-relation queries the response was YES. [2023-08-29 23:10:06,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72866 conditions, 6033 events. 2972/6033 cut-off events. For 371413/371413 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 49722 event pairs, 417 based on Foata normal form. 28/6061 useless extension candidates. Maximal degree in co-relation 72690. Up to 2145 conditions per place. [2023-08-29 23:10:06,704 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 716 selfloop transitions, 569 changer transitions 14/1299 dead transitions. [2023-08-29 23:10:06,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1299 transitions, 38446 flow [2023-08-29 23:10:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-29 23:10:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-29 23:10:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5028 transitions. [2023-08-29 23:10:06,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42516489091831555 [2023-08-29 23:10:06,707 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5028 transitions. [2023-08-29 23:10:06,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5028 transitions. [2023-08-29 23:10:06,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:06,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5028 transitions. [2023-08-29 23:10:06,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 186.22222222222223) internal successors, (5028), 27 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:06,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 438.0) internal successors, (12264), 28 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:06,715 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 438.0) internal successors, (12264), 28 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:06,716 INFO L175 Difference]: Start difference. First operand has 503 places, 1114 transitions, 31841 flow. Second operand 27 states and 5028 transitions. [2023-08-29 23:10:06,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1299 transitions, 38446 flow [2023-08-29 23:10:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1299 transitions, 36485 flow, removed 780 selfloop flow, removed 18 redundant places. [2023-08-29 23:10:10,858 INFO L231 Difference]: Finished difference. Result has 515 places, 1141 transitions, 32880 flow [2023-08-29 23:10:10,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=30234, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=32880, PETRI_PLACES=515, PETRI_TRANSITIONS=1141} [2023-08-29 23:10:10,860 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 486 predicate places. [2023-08-29 23:10:10,860 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1141 transitions, 32880 flow [2023-08-29 23:10:10,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.93333333333334) internal successors, (2744), 15 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:10,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:10,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:10,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:11,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-29 23:10:11,066 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:11,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash -522323943, now seen corresponding path program 52 times [2023-08-29 23:10:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:11,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169575503] [2023-08-29 23:10:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:11,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169575503] [2023-08-29 23:10:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169575503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756411346] [2023-08-29 23:10:11,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:10:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:11,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:11,156 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:11,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-29 23:10:11,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:10:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:11,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756411346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:11,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:11,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-29 23:10:11,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448931284] [2023-08-29 23:10:11,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:10:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:10:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:10:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:11,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1141 transitions, 32880 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:11,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:11,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:11,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:14,906 INFO L130 PetriNetUnfolder]: 2957/6050 cut-off events. [2023-08-29 23:10:14,906 INFO L131 PetriNetUnfolder]: For 349447/349447 co-relation queries the response was YES. [2023-08-29 23:10:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71391 conditions, 6050 events. 2957/6050 cut-off events. For 349447/349447 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 50185 event pairs, 562 based on Foata normal form. 36/6086 useless extension candidates. Maximal degree in co-relation 71210. Up to 2754 conditions per place. [2023-08-29 23:10:14,982 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 777 selfloop transitions, 492 changer transitions 1/1270 dead transitions. [2023-08-29 23:10:14,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1270 transitions, 37681 flow [2023-08-29 23:10:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 23:10:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 23:10:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4106 transitions. [2023-08-29 23:10:14,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261104192611042 [2023-08-29 23:10:14,986 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4106 transitions. [2023-08-29 23:10:14,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4106 transitions. [2023-08-29 23:10:14,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:14,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4106 transitions. [2023-08-29 23:10:14,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 186.63636363636363) internal successors, (4106), 22 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:14,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:14,995 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:14,995 INFO L175 Difference]: Start difference. First operand has 515 places, 1141 transitions, 32880 flow. Second operand 22 states and 4106 transitions. [2023-08-29 23:10:14,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1270 transitions, 37681 flow [2023-08-29 23:10:18,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1270 transitions, 36706 flow, removed 55 selfloop flow, removed 21 redundant places. [2023-08-29 23:10:18,843 INFO L231 Difference]: Finished difference. Result has 515 places, 1157 transitions, 33599 flow [2023-08-29 23:10:18,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=31537, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=33599, PETRI_PLACES=515, PETRI_TRANSITIONS=1157} [2023-08-29 23:10:18,845 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 486 predicate places. [2023-08-29 23:10:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1157 transitions, 33599 flow [2023-08-29 23:10:18,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:18,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:18,846 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:18,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-29 23:10:19,052 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:19,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 538621454, now seen corresponding path program 53 times [2023-08-29 23:10:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986279743] [2023-08-29 23:10:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:19,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:19,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986279743] [2023-08-29 23:10:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986279743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161923221] [2023-08-29 23:10:19,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:10:19,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:19,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:19,145 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:19,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-29 23:10:19,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:10:19,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:19,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:19,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161923221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:19,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:19,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-29 23:10:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710735633] [2023-08-29 23:10:19,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:19,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:10:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:10:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:10:19,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:19,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1157 transitions, 33599 flow. Second operand has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:19,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:19,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:19,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:22,699 INFO L130 PetriNetUnfolder]: 2910/5905 cut-off events. [2023-08-29 23:10:22,699 INFO L131 PetriNetUnfolder]: For 319202/319202 co-relation queries the response was YES. [2023-08-29 23:10:22,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70329 conditions, 5905 events. 2910/5905 cut-off events. For 319202/319202 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 48401 event pairs, 80 based on Foata normal form. 26/5931 useless extension candidates. Maximal degree in co-relation 70146. Up to 1670 conditions per place. [2023-08-29 23:10:22,773 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 733 selfloop transitions, 510 changer transitions 5/1248 dead transitions. [2023-08-29 23:10:22,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1248 transitions, 37735 flow [2023-08-29 23:10:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-29 23:10:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-29 23:10:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5205 transitions. [2023-08-29 23:10:22,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424412915851272 [2023-08-29 23:10:22,776 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5205 transitions. [2023-08-29 23:10:22,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5205 transitions. [2023-08-29 23:10:22,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:22,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5205 transitions. [2023-08-29 23:10:22,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 185.89285714285714) internal successors, (5205), 28 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:22,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 438.0) internal successors, (12702), 29 states have internal predecessors, (12702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:22,784 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 438.0) internal successors, (12702), 29 states have internal predecessors, (12702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:22,784 INFO L175 Difference]: Start difference. First operand has 515 places, 1157 transitions, 33599 flow. Second operand 28 states and 5205 transitions. [2023-08-29 23:10:22,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1248 transitions, 37735 flow [2023-08-29 23:10:26,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1248 transitions, 36791 flow, removed 160 selfloop flow, removed 12 redundant places. [2023-08-29 23:10:26,657 INFO L231 Difference]: Finished difference. Result has 532 places, 1167 transitions, 34352 flow [2023-08-29 23:10:26,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=31945, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=34352, PETRI_PLACES=532, PETRI_TRANSITIONS=1167} [2023-08-29 23:10:26,658 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 503 predicate places. [2023-08-29 23:10:26,658 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1167 transitions, 34352 flow [2023-08-29 23:10:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.8) internal successors, (2742), 15 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:26,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:26,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:26,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-08-29 23:10:26,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-08-29 23:10:26,859 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:26,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash 641670866, now seen corresponding path program 54 times [2023-08-29 23:10:26,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:26,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135602896] [2023-08-29 23:10:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:26,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:10:26,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135602896] [2023-08-29 23:10:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135602896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:26,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888282230] [2023-08-29 23:10:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:10:26,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:26,927 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:26,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-29 23:10:27,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:10:27,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:27,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:10:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888282230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:27,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:27,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-29 23:10:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619796205] [2023-08-29 23:10:27,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:10:27,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:10:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:10:27,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:27,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1167 transitions, 34352 flow. Second operand has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:27,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:27,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:27,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:31,287 INFO L130 PetriNetUnfolder]: 3372/6853 cut-off events. [2023-08-29 23:10:31,287 INFO L131 PetriNetUnfolder]: For 416363/416363 co-relation queries the response was YES. [2023-08-29 23:10:31,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84511 conditions, 6853 events. 3372/6853 cut-off events. For 416363/416363 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 57864 event pairs, 150 based on Foata normal form. 52/6905 useless extension candidates. Maximal degree in co-relation 84328. Up to 2007 conditions per place. [2023-08-29 23:10:31,378 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 784 selfloop transitions, 652 changer transitions 5/1441 dead transitions. [2023-08-29 23:10:31,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1441 transitions, 44486 flow [2023-08-29 23:10:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 23:10:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 23:10:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 6145 transitions. [2023-08-29 23:10:31,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251418292514183 [2023-08-29 23:10:31,381 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 6145 transitions. [2023-08-29 23:10:31,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 6145 transitions. [2023-08-29 23:10:31,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:31,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 6145 transitions. [2023-08-29 23:10:31,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 186.21212121212122) internal successors, (6145), 33 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:31,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:31,391 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 438.0) internal successors, (14892), 34 states have internal predecessors, (14892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:31,391 INFO L175 Difference]: Start difference. First operand has 532 places, 1167 transitions, 34352 flow. Second operand 33 states and 6145 transitions. [2023-08-29 23:10:31,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1441 transitions, 44486 flow [2023-08-29 23:10:36,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1441 transitions, 42665 flow, removed 629 selfloop flow, removed 12 redundant places. [2023-08-29 23:10:36,427 INFO L231 Difference]: Finished difference. Result has 559 places, 1313 transitions, 39944 flow [2023-08-29 23:10:36,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=32217, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=39944, PETRI_PLACES=559, PETRI_TRANSITIONS=1313} [2023-08-29 23:10:36,428 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 530 predicate places. [2023-08-29 23:10:36,428 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1313 transitions, 39944 flow [2023-08-29 23:10:36,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:36,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:36,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:36,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-08-29 23:10:36,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:36,629 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:36,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:36,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2062801614, now seen corresponding path program 55 times [2023-08-29 23:10:36,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:36,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916771795] [2023-08-29 23:10:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:36,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:36,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916771795] [2023-08-29 23:10:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916771795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956340535] [2023-08-29 23:10:36,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:10:36,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:36,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:36,712 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:36,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-29 23:10:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:36,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:36,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956340535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:36,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:36,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-29 23:10:36,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744353217] [2023-08-29 23:10:36,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:36,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:10:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:10:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:10:36,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:36,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1313 transitions, 39944 flow. Second operand has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:36,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:36,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:36,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:41,087 INFO L130 PetriNetUnfolder]: 3483/7040 cut-off events. [2023-08-29 23:10:41,087 INFO L131 PetriNetUnfolder]: For 427999/427999 co-relation queries the response was YES. [2023-08-29 23:10:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87419 conditions, 7040 events. 3483/7040 cut-off events. For 427999/427999 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59368 event pairs, 276 based on Foata normal form. 84/7124 useless extension candidates. Maximal degree in co-relation 87232. Up to 5459 conditions per place. [2023-08-29 23:10:41,180 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1138 selfloop transitions, 311 changer transitions 1/1450 dead transitions. [2023-08-29 23:10:41,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1450 transitions, 45451 flow [2023-08-29 23:10:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:10:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:10:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3929 transitions. [2023-08-29 23:10:41,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42715807784300935 [2023-08-29 23:10:41,183 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3929 transitions. [2023-08-29 23:10:41,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3929 transitions. [2023-08-29 23:10:41,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:41,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3929 transitions. [2023-08-29 23:10:41,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.0952380952381) internal successors, (3929), 21 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:41,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:41,189 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:41,189 INFO L175 Difference]: Start difference. First operand has 559 places, 1313 transitions, 39944 flow. Second operand 21 states and 3929 transitions. [2023-08-29 23:10:41,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1450 transitions, 45451 flow [2023-08-29 23:10:47,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1450 transitions, 43935 flow, removed 659 selfloop flow, removed 18 redundant places. [2023-08-29 23:10:47,067 INFO L231 Difference]: Finished difference. Result has 566 places, 1364 transitions, 40626 flow [2023-08-29 23:10:47,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38269, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=40626, PETRI_PLACES=566, PETRI_TRANSITIONS=1364} [2023-08-29 23:10:47,068 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 537 predicate places. [2023-08-29 23:10:47,069 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1364 transitions, 40626 flow [2023-08-29 23:10:47,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:47,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:47,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:47,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:47,275 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:47,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash 468229150, now seen corresponding path program 56 times [2023-08-29 23:10:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260050472] [2023-08-29 23:10:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:47,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260050472] [2023-08-29 23:10:47,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260050472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:47,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723427619] [2023-08-29 23:10:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:10:47,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:47,341 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:47,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-29 23:10:47,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:10:47,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:47,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:47,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723427619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:47,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:47,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-29 23:10:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317637808] [2023-08-29 23:10:47,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:47,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:10:47,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:10:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:10:47,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:47,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1364 transitions, 40626 flow. Second operand has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:47,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:47,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:47,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:10:51,705 INFO L130 PetriNetUnfolder]: 3431/6934 cut-off events. [2023-08-29 23:10:51,705 INFO L131 PetriNetUnfolder]: For 387869/387869 co-relation queries the response was YES. [2023-08-29 23:10:51,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84361 conditions, 6934 events. 3431/6934 cut-off events. For 387869/387869 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 58396 event pairs, 180 based on Foata normal form. 122/7056 useless extension candidates. Maximal degree in co-relation 84170. Up to 3193 conditions per place. [2023-08-29 23:10:51,806 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 904 selfloop transitions, 548 changer transitions 0/1452 dead transitions. [2023-08-29 23:10:51,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1452 transitions, 44529 flow [2023-08-29 23:10:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:10:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:10:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4307 transitions. [2023-08-29 23:10:51,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427536231884058 [2023-08-29 23:10:51,809 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4307 transitions. [2023-08-29 23:10:51,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4307 transitions. [2023-08-29 23:10:51,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:10:51,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4307 transitions. [2023-08-29 23:10:51,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 187.2608695652174) internal successors, (4307), 23 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:51,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:51,815 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 438.0) internal successors, (10512), 24 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:51,815 INFO L175 Difference]: Start difference. First operand has 566 places, 1364 transitions, 40626 flow. Second operand 23 states and 4307 transitions. [2023-08-29 23:10:51,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1452 transitions, 44529 flow [2023-08-29 23:10:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 1452 transitions, 43980 flow, removed 91 selfloop flow, removed 14 redundant places. [2023-08-29 23:10:57,076 INFO L231 Difference]: Finished difference. Result has 575 places, 1340 transitions, 40738 flow [2023-08-29 23:10:57,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=38846, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40738, PETRI_PLACES=575, PETRI_TRANSITIONS=1340} [2023-08-29 23:10:57,077 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 546 predicate places. [2023-08-29 23:10:57,077 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 1340 transitions, 40738 flow [2023-08-29 23:10:57,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 183.06666666666666) internal successors, (2746), 15 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:57,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:10:57,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:10:57,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-29 23:10:57,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:57,278 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:10:57,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:10:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash 936615282, now seen corresponding path program 57 times [2023-08-29 23:10:57,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:10:57,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195600964] [2023-08-29 23:10:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:10:57,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:10:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:10:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:57,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:10:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195600964] [2023-08-29 23:10:57,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195600964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:10:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662431550] [2023-08-29 23:10:57,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:10:57,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:10:57,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:10:57,341 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:10:57,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-29 23:10:57,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:10:57,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:10:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:10:57,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:10:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:57,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:10:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:10:57,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662431550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:10:57,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:10:57,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-29 23:10:57,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037674782] [2023-08-29 23:10:57,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:10:57,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:10:57,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:10:57,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:10:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:10:57,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:10:57,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 1340 transitions, 40738 flow. Second operand has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:10:57,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:10:57,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:10:57,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:01,932 INFO L130 PetriNetUnfolder]: 3509/7064 cut-off events. [2023-08-29 23:11:01,933 INFO L131 PetriNetUnfolder]: For 402281/402281 co-relation queries the response was YES. [2023-08-29 23:11:02,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87762 conditions, 7064 events. 3509/7064 cut-off events. For 402281/402281 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59350 event pairs, 170 based on Foata normal form. 14/7078 useless extension candidates. Maximal degree in co-relation 87572. Up to 2359 conditions per place. [2023-08-29 23:11:02,133 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 776 selfloop transitions, 676 changer transitions 9/1461 dead transitions. [2023-08-29 23:11:02,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1461 transitions, 46169 flow [2023-08-29 23:11:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 23:11:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 23:11:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5568 transitions. [2023-08-29 23:11:02,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237442922374429 [2023-08-29 23:11:02,136 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5568 transitions. [2023-08-29 23:11:02,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5568 transitions. [2023-08-29 23:11:02,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:02,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5568 transitions. [2023-08-29 23:11:02,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.6) internal successors, (5568), 30 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:02,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 438.0) internal successors, (13578), 31 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:02,145 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 438.0) internal successors, (13578), 31 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:02,146 INFO L175 Difference]: Start difference. First operand has 575 places, 1340 transitions, 40738 flow. Second operand 30 states and 5568 transitions. [2023-08-29 23:11:02,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1461 transitions, 46169 flow [2023-08-29 23:11:07,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1461 transitions, 45733 flow, removed 63 selfloop flow, removed 12 redundant places. [2023-08-29 23:11:07,874 INFO L231 Difference]: Finished difference. Result has 599 places, 1370 transitions, 43535 flow [2023-08-29 23:11:07,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=40191, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=43535, PETRI_PLACES=599, PETRI_TRANSITIONS=1370} [2023-08-29 23:11:07,875 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 570 predicate places. [2023-08-29 23:11:07,875 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1370 transitions, 43535 flow [2023-08-29 23:11:07,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:07,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:07,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:07,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-08-29 23:11:08,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:08,076 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:08,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 389522062, now seen corresponding path program 58 times [2023-08-29 23:11:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089509488] [2023-08-29 23:11:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:08,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:08,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089509488] [2023-08-29 23:11:08,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089509488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135458050] [2023-08-29 23:11:08,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:11:08,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:08,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:08,146 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:11:08,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-29 23:11:08,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:11:08,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:08,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:11:08,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:08,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:08,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135458050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:08,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:08,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-29 23:11:08,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530935999] [2023-08-29 23:11:08,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:08,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:11:08,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:08,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:11:08,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:11:08,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:11:08,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1370 transitions, 43535 flow. Second operand has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:08,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:08,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:11:08,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:13,340 INFO L130 PetriNetUnfolder]: 3769/7634 cut-off events. [2023-08-29 23:11:13,341 INFO L131 PetriNetUnfolder]: For 510832/510832 co-relation queries the response was YES. [2023-08-29 23:11:13,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99692 conditions, 7634 events. 3769/7634 cut-off events. For 510832/510832 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 65391 event pairs, 208 based on Foata normal form. 40/7674 useless extension candidates. Maximal degree in co-relation 99496. Up to 2196 conditions per place. [2023-08-29 23:11:13,454 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 747 selfloop transitions, 800 changer transitions 20/1567 dead transitions. [2023-08-29 23:11:13,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1567 transitions, 52412 flow [2023-08-29 23:11:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-29 23:11:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-29 23:11:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6310 transitions. [2023-08-29 23:11:13,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237174321783508 [2023-08-29 23:11:13,457 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6310 transitions. [2023-08-29 23:11:13,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6310 transitions. [2023-08-29 23:11:13,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:13,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6310 transitions. [2023-08-29 23:11:13,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 185.58823529411765) internal successors, (6310), 34 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:13,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:13,467 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:13,468 INFO L175 Difference]: Start difference. First operand has 599 places, 1370 transitions, 43535 flow. Second operand 34 states and 6310 transitions. [2023-08-29 23:11:13,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1567 transitions, 52412 flow [2023-08-29 23:11:20,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1567 transitions, 52011 flow, removed 116 selfloop flow, removed 13 redundant places. [2023-08-29 23:11:20,596 INFO L231 Difference]: Finished difference. Result has 624 places, 1454 transitions, 49419 flow [2023-08-29 23:11:20,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=42942, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=719, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=49419, PETRI_PLACES=624, PETRI_TRANSITIONS=1454} [2023-08-29 23:11:20,597 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 595 predicate places. [2023-08-29 23:11:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1454 transitions, 49419 flow [2023-08-29 23:11:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:20,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:20,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:20,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-08-29 23:11:20,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:20,798 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:20,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash -632206374, now seen corresponding path program 59 times [2023-08-29 23:11:20,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:20,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690230194] [2023-08-29 23:11:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:20,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690230194] [2023-08-29 23:11:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690230194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280519163] [2023-08-29 23:11:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:11:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:20,885 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:11:20,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-29 23:11:21,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:11:21,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:11:21,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:21,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280519163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:21,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:21,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-29 23:11:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369641050] [2023-08-29 23:11:21,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:21,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:11:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:11:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:11:21,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:11:21,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1454 transitions, 49419 flow. Second operand has 17 states, 17 states have (on average 182.94117647058823) internal successors, (3110), 17 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:21,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:21,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:11:21,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:27,416 INFO L130 PetriNetUnfolder]: 4544/9247 cut-off events. [2023-08-29 23:11:27,416 INFO L131 PetriNetUnfolder]: For 700955/700955 co-relation queries the response was YES. [2023-08-29 23:11:27,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126116 conditions, 9247 events. 4544/9247 cut-off events. For 700955/700955 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 82374 event pairs, 264 based on Foata normal form. 42/9289 useless extension candidates. Maximal degree in co-relation 125914. Up to 3075 conditions per place. [2023-08-29 23:11:27,552 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 981 selfloop transitions, 880 changer transitions 0/1861 dead transitions. [2023-08-29 23:11:27,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 1861 transitions, 66146 flow [2023-08-29 23:11:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:11:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:11:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4496 transitions. [2023-08-29 23:11:27,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277016742770167 [2023-08-29 23:11:27,554 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4496 transitions. [2023-08-29 23:11:27,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4496 transitions. [2023-08-29 23:11:27,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:27,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4496 transitions. [2023-08-29 23:11:27,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.33333333333334) internal successors, (4496), 24 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:27,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:27,561 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:27,562 INFO L175 Difference]: Start difference. First operand has 624 places, 1454 transitions, 49419 flow. Second operand 24 states and 4496 transitions. [2023-08-29 23:11:27,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 1861 transitions, 66146 flow [2023-08-29 23:11:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1861 transitions, 64187 flow, removed 696 selfloop flow, removed 16 redundant places. [2023-08-29 23:11:39,326 INFO L231 Difference]: Finished difference. Result has 632 places, 1684 transitions, 59211 flow [2023-08-29 23:11:39,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=47281, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=59211, PETRI_PLACES=632, PETRI_TRANSITIONS=1684} [2023-08-29 23:11:39,327 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 603 predicate places. [2023-08-29 23:11:39,327 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 1684 transitions, 59211 flow [2023-08-29 23:11:39,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 182.94117647058823) internal successors, (3110), 17 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:39,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:11:39,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:11:39,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-29 23:11:39,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-29 23:11:39,528 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:11:39,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:11:39,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1579231018, now seen corresponding path program 60 times [2023-08-29 23:11:39,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:11:39,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903810475] [2023-08-29 23:11:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:11:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:11:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:11:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:39,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:11:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903810475] [2023-08-29 23:11:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903810475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:11:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902939246] [2023-08-29 23:11:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:11:39,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:11:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:11:39,599 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:11:39,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-29 23:11:39,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:11:39,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:11:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:11:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:11:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:39,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:11:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:11:39,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902939246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:11:39,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:11:39,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-29 23:11:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608540811] [2023-08-29 23:11:39,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:11:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:11:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:11:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:11:39,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:11:39,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:11:39,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1684 transitions, 59211 flow. Second operand has 20 states, 20 states have (on average 182.8) internal successors, (3656), 20 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:39,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:11:39,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:11:39,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:11:46,494 INFO L130 PetriNetUnfolder]: 4770/9691 cut-off events. [2023-08-29 23:11:46,494 INFO L131 PetriNetUnfolder]: For 762649/762649 co-relation queries the response was YES. [2023-08-29 23:11:46,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133973 conditions, 9691 events. 4770/9691 cut-off events. For 762649/762649 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 86825 event pairs, 1823 based on Foata normal form. 106/9797 useless extension candidates. Maximal degree in co-relation 133766. Up to 8785 conditions per place. [2023-08-29 23:11:46,677 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1662 selfloop transitions, 188 changer transitions 0/1850 dead transitions. [2023-08-29 23:11:46,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 1850 transitions, 67529 flow [2023-08-29 23:11:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 23:11:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 23:11:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3941 transitions. [2023-08-29 23:11:46,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4284627092846271 [2023-08-29 23:11:46,679 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3941 transitions. [2023-08-29 23:11:46,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3941 transitions. [2023-08-29 23:11:46,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:11:46,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3941 transitions. [2023-08-29 23:11:46,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.66666666666666) internal successors, (3941), 21 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:46,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:46,686 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 438.0) internal successors, (9636), 22 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:11:46,686 INFO L175 Difference]: Start difference. First operand has 632 places, 1684 transitions, 59211 flow. Second operand 21 states and 3941 transitions. [2023-08-29 23:11:46,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 1850 transitions, 67529 flow [2023-08-29 23:12:01,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1850 transitions, 66265 flow, removed 524 selfloop flow, removed 11 redundant places. [2023-08-29 23:12:02,091 INFO L231 Difference]: Finished difference. Result has 650 places, 1768 transitions, 61993 flow [2023-08-29 23:12:02,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=57930, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=61993, PETRI_PLACES=650, PETRI_TRANSITIONS=1768} [2023-08-29 23:12:02,092 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 621 predicate places. [2023-08-29 23:12:02,092 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1768 transitions, 61993 flow [2023-08-29 23:12:02,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.8) internal successors, (3656), 20 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:02,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:02,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:12:02,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-29 23:12:02,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-29 23:12:02,300 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:12:02,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -949870662, now seen corresponding path program 61 times [2023-08-29 23:12:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:12:02,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796787801] [2023-08-29 23:12:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:02,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:12:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:02,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:12:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796787801] [2023-08-29 23:12:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796787801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:12:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766771102] [2023-08-29 23:12:02,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:12:02,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:12:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:12:02,370 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:12:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-29 23:12:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:12:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:02,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:12:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:02,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766771102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:12:02,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:12:02,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-29 23:12:02,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791613790] [2023-08-29 23:12:02,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:12:02,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:12:02,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:12:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:12:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:12:02,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:12:02,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1768 transitions, 61993 flow. Second operand has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:02,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:12:02,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:12:02,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:12:11,307 INFO L130 PetriNetUnfolder]: 5144/10519 cut-off events. [2023-08-29 23:12:11,308 INFO L131 PetriNetUnfolder]: For 817510/817510 co-relation queries the response was YES. [2023-08-29 23:12:11,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145403 conditions, 10519 events. 5144/10519 cut-off events. For 817510/817510 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 96328 event pairs, 770 based on Foata normal form. 48/10567 useless extension candidates. Maximal degree in co-relation 145188. Up to 3044 conditions per place. [2023-08-29 23:12:11,473 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1245 selfloop transitions, 788 changer transitions 18/2051 dead transitions. [2023-08-29 23:12:11,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2051 transitions, 74389 flow [2023-08-29 23:12:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 23:12:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 23:12:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6875 transitions. [2023-08-29 23:12:11,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42422559545847216 [2023-08-29 23:12:11,477 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6875 transitions. [2023-08-29 23:12:11,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6875 transitions. [2023-08-29 23:12:11,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:11,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6875 transitions. [2023-08-29 23:12:11,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 185.8108108108108) internal successors, (6875), 37 states have internal predecessors, (6875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:11,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 438.0) internal successors, (16644), 38 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:11,488 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 438.0) internal successors, (16644), 38 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:11,488 INFO L175 Difference]: Start difference. First operand has 650 places, 1768 transitions, 61993 flow. Second operand 37 states and 6875 transitions. [2023-08-29 23:12:11,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2051 transitions, 74389 flow [2023-08-29 23:12:27,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 2051 transitions, 72608 flow, removed 868 selfloop flow, removed 4 redundant places. [2023-08-29 23:12:27,319 INFO L231 Difference]: Finished difference. Result has 696 places, 1917 transitions, 69452 flow [2023-08-29 23:12:27,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=60351, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=637, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=69452, PETRI_PLACES=696, PETRI_TRANSITIONS=1917} [2023-08-29 23:12:27,321 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 667 predicate places. [2023-08-29 23:12:27,321 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 1917 transitions, 69452 flow [2023-08-29 23:12:27,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.55) internal successors, (3651), 20 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:27,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:12:27,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:12:27,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-08-29 23:12:27,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-29 23:12:27,523 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:12:27,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:12:27,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2134904985, now seen corresponding path program 62 times [2023-08-29 23:12:27,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:12:27,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828166179] [2023-08-29 23:12:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:12:27,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:12:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:12:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:12:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828166179] [2023-08-29 23:12:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828166179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:12:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932355991] [2023-08-29 23:12:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:12:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:12:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:12:27,592 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:12:27,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-29 23:12:27,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:12:27,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:12:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:12:27,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:12:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:27,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:12:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:12:27,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932355991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:12:27,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:12:27,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-29 23:12:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857123514] [2023-08-29 23:12:27,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:12:27,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:12:27,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:12:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:12:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:12:27,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:12:27,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1917 transitions, 69452 flow. Second operand has 17 states, 17 states have (on average 182.88235294117646) internal successors, (3109), 17 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:27,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:12:27,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:12:27,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:12:38,459 INFO L130 PetriNetUnfolder]: 5773/11796 cut-off events. [2023-08-29 23:12:38,459 INFO L131 PetriNetUnfolder]: For 1115695/1115695 co-relation queries the response was YES. [2023-08-29 23:12:38,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171322 conditions, 11796 events. 5773/11796 cut-off events. For 1115695/1115695 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 109920 event pairs, 487 based on Foata normal form. 62/11858 useless extension candidates. Maximal degree in co-relation 171092. Up to 7882 conditions per place. [2023-08-29 23:12:38,655 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 1687 selfloop transitions, 620 changer transitions 3/2310 dead transitions. [2023-08-29 23:12:38,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2310 transitions, 88806 flow [2023-08-29 23:12:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 23:12:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 23:12:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4492 transitions. [2023-08-29 23:12:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273211567732116 [2023-08-29 23:12:38,658 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4492 transitions. [2023-08-29 23:12:38,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4492 transitions. [2023-08-29 23:12:38,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:12:38,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4492 transitions. [2023-08-29 23:12:38,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 187.16666666666666) internal successors, (4492), 24 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:38,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:38,665 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:12:38,665 INFO L175 Difference]: Start difference. First operand has 696 places, 1917 transitions, 69452 flow. Second operand 24 states and 4492 transitions. [2023-08-29 23:12:38,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2310 transitions, 88806 flow [2023-08-29 23:13:01,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 2310 transitions, 83267 flow, removed 2445 selfloop flow, removed 13 redundant places. [2023-08-29 23:13:01,066 INFO L231 Difference]: Finished difference. Result has 713 places, 2126 transitions, 75678 flow [2023-08-29 23:13:01,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=66195, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=75678, PETRI_PLACES=713, PETRI_TRANSITIONS=2126} [2023-08-29 23:13:01,067 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 684 predicate places. [2023-08-29 23:13:01,068 INFO L495 AbstractCegarLoop]: Abstraction has has 713 places, 2126 transitions, 75678 flow [2023-08-29 23:13:01,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 182.88235294117646) internal successors, (3109), 17 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:01,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:13:01,068 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:13:01,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-29 23:13:01,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-08-29 23:13:01,269 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:13:01,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:13:01,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1471728443, now seen corresponding path program 63 times [2023-08-29 23:13:01,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:13:01,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005601588] [2023-08-29 23:13:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:13:01,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:13:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:13:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:13:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005601588] [2023-08-29 23:13:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005601588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:13:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859086437] [2023-08-29 23:13:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:13:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:13:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:13:01,335 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:13:01,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-29 23:13:01,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:13:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:13:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:13:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:13:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:13:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:01,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859086437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:13:01,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:13:01,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-29 23:13:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327760167] [2023-08-29 23:13:01,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:13:01,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 23:13:01,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:13:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 23:13:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-29 23:13:01,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:13:01,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 2126 transitions, 75678 flow. Second operand has 17 states, 17 states have (on average 182.8235294117647) internal successors, (3108), 17 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:01,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:13:01,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:13:01,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:13:13,086 INFO L130 PetriNetUnfolder]: 5915/12158 cut-off events. [2023-08-29 23:13:13,086 INFO L131 PetriNetUnfolder]: For 1087345/1087345 co-relation queries the response was YES. [2023-08-29 23:13:13,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173110 conditions, 12158 events. 5915/12158 cut-off events. For 1087345/1087345 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 114042 event pairs, 301 based on Foata normal form. 112/12270 useless extension candidates. Maximal degree in co-relation 172876. Up to 6125 conditions per place. [2023-08-29 23:13:13,291 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1549 selfloop transitions, 746 changer transitions 9/2304 dead transitions. [2023-08-29 23:13:13,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 2304 transitions, 85688 flow [2023-08-29 23:13:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-29 23:13:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-29 23:13:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6315 transitions. [2023-08-29 23:13:13,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240531829170024 [2023-08-29 23:13:13,295 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6315 transitions. [2023-08-29 23:13:13,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6315 transitions. [2023-08-29 23:13:13,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:13:13,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6315 transitions. [2023-08-29 23:13:13,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 185.73529411764707) internal successors, (6315), 34 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:13,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:13,305 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 438.0) internal successors, (15330), 35 states have internal predecessors, (15330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:13,305 INFO L175 Difference]: Start difference. First operand has 713 places, 2126 transitions, 75678 flow. Second operand 34 states and 6315 transitions. [2023-08-29 23:13:13,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 2304 transitions, 85688 flow [2023-08-29 23:13:35,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 2304 transitions, 83396 flow, removed 861 selfloop flow, removed 12 redundant places. [2023-08-29 23:13:35,578 INFO L231 Difference]: Finished difference. Result has 747 places, 2193 transitions, 79733 flow [2023-08-29 23:13:35,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=73322, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=79733, PETRI_PLACES=747, PETRI_TRANSITIONS=2193} [2023-08-29 23:13:35,580 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 718 predicate places. [2023-08-29 23:13:35,580 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 2193 transitions, 79733 flow [2023-08-29 23:13:35,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 182.8235294117647) internal successors, (3108), 17 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:35,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:13:35,581 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:13:35,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-29 23:13:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:13:35,787 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:13:35,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:13:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash -339650093, now seen corresponding path program 64 times [2023-08-29 23:13:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:13:35,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499889907] [2023-08-29 23:13:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:13:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:13:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:13:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:35,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:13:35,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499889907] [2023-08-29 23:13:35,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499889907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:13:35,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514803782] [2023-08-29 23:13:35,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:13:35,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:13:35,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:13:35,850 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:13:35,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-29 23:13:35,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:13:35,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:13:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:13:35,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:13:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:36,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:13:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:13:36,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514803782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:13:36,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:13:36,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-29 23:13:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487109793] [2023-08-29 23:13:36,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:13:36,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:13:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:13:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:13:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:13:36,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:13:36,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 2193 transitions, 79733 flow. Second operand has 14 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:36,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:13:36,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:13:36,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:13:47,998 INFO L130 PetriNetUnfolder]: 6214/12697 cut-off events. [2023-08-29 23:13:47,998 INFO L131 PetriNetUnfolder]: For 1181455/1181455 co-relation queries the response was YES. [2023-08-29 23:13:48,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184956 conditions, 12697 events. 6214/12697 cut-off events. For 1181455/1181455 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 119598 event pairs, 255 based on Foata normal form. 52/12749 useless extension candidates. Maximal degree in co-relation 184712. Up to 9930 conditions per place. [2023-08-29 23:13:48,223 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 1866 selfloop transitions, 527 changer transitions 0/2393 dead transitions. [2023-08-29 23:13:48,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 2393 transitions, 90964 flow [2023-08-29 23:13:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:13:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:13:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1687 transitions. [2023-08-29 23:13:48,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42795535261288686 [2023-08-29 23:13:48,224 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1687 transitions. [2023-08-29 23:13:48,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1687 transitions. [2023-08-29 23:13:48,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:13:48,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1687 transitions. [2023-08-29 23:13:48,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 187.44444444444446) internal successors, (1687), 9 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:48,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:48,227 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 438.0) internal successors, (4380), 10 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:13:48,227 INFO L175 Difference]: Start difference. First operand has 747 places, 2193 transitions, 79733 flow. Second operand 9 states and 1687 transitions. [2023-08-29 23:13:48,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 2393 transitions, 90964 flow [2023-08-29 23:14:12,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 2393 transitions, 88825 flow, removed 717 selfloop flow, removed 19 redundant places. [2023-08-29 23:14:12,993 INFO L231 Difference]: Finished difference. Result has 741 places, 2289 transitions, 83256 flow [2023-08-29 23:14:12,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=77782, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=83256, PETRI_PLACES=741, PETRI_TRANSITIONS=2289} [2023-08-29 23:14:12,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 712 predicate places. [2023-08-29 23:14:12,995 INFO L495 AbstractCegarLoop]: Abstraction has has 741 places, 2289 transitions, 83256 flow [2023-08-29 23:14:12,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:12,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:14:12,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:14:13,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-08-29 23:14:13,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:13,196 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:14:13,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:14:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 387994068, now seen corresponding path program 65 times [2023-08-29 23:14:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:14:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314926090] [2023-08-29 23:14:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:14:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:14:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:14:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:14:13,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:14:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314926090] [2023-08-29 23:14:13,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314926090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:14:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289174861] [2023-08-29 23:14:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:14:13,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:14:13,257 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:14:13,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-29 23:14:13,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-29 23:14:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:14:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:14:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:14:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:13,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:14:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:14:13,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289174861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:14:13,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:14:13,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-08-29 23:14:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044024762] [2023-08-29 23:14:13,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:14:13,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:14:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:14:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:14:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:14:13,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:14:13,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 2289 transitions, 83256 flow. Second operand has 16 states, 16 states have (on average 182.9375) internal successors, (2927), 16 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:13,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:14:13,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:14:13,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:14:26,496 INFO L130 PetriNetUnfolder]: 6491/13290 cut-off events. [2023-08-29 23:14:26,497 INFO L131 PetriNetUnfolder]: For 1284924/1284924 co-relation queries the response was YES. [2023-08-29 23:14:26,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193984 conditions, 13290 events. 6491/13290 cut-off events. For 1284924/1284924 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 126569 event pairs, 2140 based on Foata normal form. 98/13388 useless extension candidates. Maximal degree in co-relation 193740. Up to 10478 conditions per place. [2023-08-29 23:14:26,738 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2040 selfloop transitions, 436 changer transitions 0/2476 dead transitions. [2023-08-29 23:14:26,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2476 transitions, 93941 flow [2023-08-29 23:14:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:14:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:14:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3369 transitions. [2023-08-29 23:14:26,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273211567732116 [2023-08-29 23:14:26,740 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3369 transitions. [2023-08-29 23:14:26,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3369 transitions. [2023-08-29 23:14:26,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:14:26,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3369 transitions. [2023-08-29 23:14:26,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 187.16666666666666) internal successors, (3369), 18 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:26,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:26,746 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 438.0) internal successors, (8322), 19 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:26,746 INFO L175 Difference]: Start difference. First operand has 741 places, 2289 transitions, 83256 flow. Second operand 18 states and 3369 transitions. [2023-08-29 23:14:26,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2476 transitions, 93941 flow [2023-08-29 23:14:52,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 2476 transitions, 93458 flow, removed 115 selfloop flow, removed 6 redundant places. [2023-08-29 23:14:53,041 INFO L231 Difference]: Finished difference. Result has 755 places, 2364 transitions, 87157 flow [2023-08-29 23:14:53,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=82289, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=87157, PETRI_PLACES=755, PETRI_TRANSITIONS=2364} [2023-08-29 23:14:53,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 726 predicate places. [2023-08-29 23:14:53,043 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 2364 transitions, 87157 flow [2023-08-29 23:14:53,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.9375) internal successors, (2927), 16 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:53,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:14:53,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:14:53,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-08-29 23:14:53,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:53,251 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:14:53,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:14:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 557486074, now seen corresponding path program 66 times [2023-08-29 23:14:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:14:53,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14693962] [2023-08-29 23:14:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:14:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:14:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:14:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:53,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:14:53,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14693962] [2023-08-29 23:14:53,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14693962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:14:53,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770848078] [2023-08-29 23:14:53,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:14:53,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:14:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:14:53,331 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:14:53,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-29 23:14:53,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:14:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:14:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:14:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:14:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:14:53,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:14:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:14:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770848078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:14:53,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:14:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-08-29 23:14:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585767537] [2023-08-29 23:14:53,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:14:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:14:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:14:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:14:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:14:53,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:14:53,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 2364 transitions, 87157 flow. Second operand has 16 states, 16 states have (on average 182.8125) internal successors, (2925), 16 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:14:53,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:14:53,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:14:53,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:15:08,031 INFO L130 PetriNetUnfolder]: 6443/13138 cut-off events. [2023-08-29 23:15:08,031 INFO L131 PetriNetUnfolder]: For 1233756/1233756 co-relation queries the response was YES. [2023-08-29 23:15:08,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193347 conditions, 13138 events. 6443/13138 cut-off events. For 1233756/1233756 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 124357 event pairs, 1086 based on Foata normal form. 42/13180 useless extension candidates. Maximal degree in co-relation 193100. Up to 4246 conditions per place. [2023-08-29 23:15:08,269 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1603 selfloop transitions, 838 changer transitions 7/2448 dead transitions. [2023-08-29 23:15:08,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 2448 transitions, 93697 flow [2023-08-29 23:15:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-29 23:15:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-29 23:15:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4642 transitions. [2023-08-29 23:15:08,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239269406392694 [2023-08-29 23:15:08,272 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4642 transitions. [2023-08-29 23:15:08,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4642 transitions. [2023-08-29 23:15:08,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:15:08,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4642 transitions. [2023-08-29 23:15:08,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 185.68) internal successors, (4642), 25 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:08,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 438.0) internal successors, (11388), 26 states have internal predecessors, (11388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:08,279 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 438.0) internal successors, (11388), 26 states have internal predecessors, (11388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:08,279 INFO L175 Difference]: Start difference. First operand has 755 places, 2364 transitions, 87157 flow. Second operand 25 states and 4642 transitions. [2023-08-29 23:15:08,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 2448 transitions, 93697 flow [2023-08-29 23:15:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 2448 transitions, 93259 flow, removed 176 selfloop flow, removed 8 redundant places. [2023-08-29 23:15:34,088 INFO L231 Difference]: Finished difference. Result has 771 places, 2355 transitions, 88402 flow [2023-08-29 23:15:34,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=85441, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=88402, PETRI_PLACES=771, PETRI_TRANSITIONS=2355} [2023-08-29 23:15:34,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 742 predicate places. [2023-08-29 23:15:34,090 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 2355 transitions, 88402 flow [2023-08-29 23:15:34,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.8125) internal successors, (2925), 16 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:34,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:15:34,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:15:34,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-29 23:15:34,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-08-29 23:15:34,291 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:15:34,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:15:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1660162226, now seen corresponding path program 67 times [2023-08-29 23:15:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:15:34,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278718325] [2023-08-29 23:15:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:15:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:15:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:15:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:15:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:15:34,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278718325] [2023-08-29 23:15:34,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278718325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:15:34,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913813778] [2023-08-29 23:15:34,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:15:34,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:15:34,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:15:34,359 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:15:34,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-29 23:15:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:15:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:15:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:15:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:15:34,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:15:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:15:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913813778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:15:34,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:15:34,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-29 23:15:34,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180606754] [2023-08-29 23:15:34,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:15:34,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:15:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:15:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:15:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:15:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:15:34,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 2355 transitions, 88402 flow. Second operand has 18 states, 18 states have (on average 182.66666666666666) internal successors, (3288), 18 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:34,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:15:34,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:15:34,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:15:52,456 INFO L130 PetriNetUnfolder]: 6789/13906 cut-off events. [2023-08-29 23:15:52,456 INFO L131 PetriNetUnfolder]: For 1393570/1393570 co-relation queries the response was YES. [2023-08-29 23:15:52,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209608 conditions, 13906 events. 6789/13906 cut-off events. For 1393570/1393570 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 133434 event pairs, 1049 based on Foata normal form. 22/13928 useless extension candidates. Maximal degree in co-relation 209358. Up to 4151 conditions per place. [2023-08-29 23:15:52,736 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1605 selfloop transitions, 1010 changer transitions 6/2621 dead transitions. [2023-08-29 23:15:52,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2621 transitions, 102345 flow [2023-08-29 23:15:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-29 23:15:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-29 23:15:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5944 transitions. [2023-08-29 23:15:52,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240867579908676 [2023-08-29 23:15:52,739 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5944 transitions. [2023-08-29 23:15:52,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5944 transitions. [2023-08-29 23:15:52,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:15:52,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5944 transitions. [2023-08-29 23:15:52,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 185.75) internal successors, (5944), 32 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:52,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 438.0) internal successors, (14454), 33 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:52,749 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 438.0) internal successors, (14454), 33 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:15:52,749 INFO L175 Difference]: Start difference. First operand has 771 places, 2355 transitions, 88402 flow. Second operand 32 states and 5944 transitions. [2023-08-29 23:15:52,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2621 transitions, 102345 flow [2023-08-29 23:16:22,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 2621 transitions, 101358 flow, removed 340 selfloop flow, removed 13 redundant places. [2023-08-29 23:16:22,710 INFO L231 Difference]: Finished difference. Result has 796 places, 2502 transitions, 97699 flow [2023-08-29 23:16:22,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=87394, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=97699, PETRI_PLACES=796, PETRI_TRANSITIONS=2502} [2023-08-29 23:16:22,712 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 767 predicate places. [2023-08-29 23:16:22,712 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 2502 transitions, 97699 flow [2023-08-29 23:16:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.66666666666666) internal successors, (3288), 18 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:22,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:16:22,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:16:22,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-08-29 23:16:22,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:16:22,919 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:16:22,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:16:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash 137144454, now seen corresponding path program 68 times [2023-08-29 23:16:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:16:22,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364015335] [2023-08-29 23:16:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:16:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:16:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:16:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:16:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364015335] [2023-08-29 23:16:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364015335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:16:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455852881] [2023-08-29 23:16:22,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:16:22,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:16:22,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:16:22,997 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:16:22,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-29 23:16:23,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:16:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:16:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:16:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:16:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:23,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:16:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:16:23,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455852881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:16:23,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:16:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-29 23:16:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681611035] [2023-08-29 23:16:23,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:16:23,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:16:23,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:16:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:16:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:16:23,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:16:23,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 2502 transitions, 97699 flow. Second operand has 14 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:23,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:16:23,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:16:23,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:16:40,815 INFO L130 PetriNetUnfolder]: 6785/13898 cut-off events. [2023-08-29 23:16:40,815 INFO L131 PetriNetUnfolder]: For 1488673/1488673 co-relation queries the response was YES. [2023-08-29 23:16:41,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214357 conditions, 13898 events. 6785/13898 cut-off events. For 1488673/1488673 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 133259 event pairs, 1385 based on Foata normal form. 2/13900 useless extension candidates. Maximal degree in co-relation 214097. Up to 7142 conditions per place. [2023-08-29 23:16:41,080 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1835 selfloop transitions, 715 changer transitions 7/2557 dead transitions. [2023-08-29 23:16:41,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 2557 transitions, 104220 flow [2023-08-29 23:16:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:16:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:16:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2599 transitions. [2023-08-29 23:16:41,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42384213959556427 [2023-08-29 23:16:41,082 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2599 transitions. [2023-08-29 23:16:41,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2599 transitions. [2023-08-29 23:16:41,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:16:41,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2599 transitions. [2023-08-29 23:16:41,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.64285714285714) internal successors, (2599), 14 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:41,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:41,087 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:16:41,087 INFO L175 Difference]: Start difference. First operand has 796 places, 2502 transitions, 97699 flow. Second operand 14 states and 2599 transitions. [2023-08-29 23:16:41,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 2557 transitions, 104220 flow [2023-08-29 23:17:15,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 2557 transitions, 101888 flow, removed 907 selfloop flow, removed 13 redundant places. [2023-08-29 23:17:16,060 INFO L231 Difference]: Finished difference. Result has 800 places, 2505 transitions, 97649 flow [2023-08-29 23:17:16,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=95370, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=710, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=97649, PETRI_PLACES=800, PETRI_TRANSITIONS=2505} [2023-08-29 23:17:16,062 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 771 predicate places. [2023-08-29 23:17:16,063 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 2505 transitions, 97649 flow [2023-08-29 23:17:16,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:16,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:17:16,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:17:16,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-29 23:17:16,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:17:16,269 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:17:16,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:17:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 394764947, now seen corresponding path program 69 times [2023-08-29 23:17:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:17:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222813459] [2023-08-29 23:17:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:17:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:17:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:17:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:17:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222813459] [2023-08-29 23:17:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222813459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:17:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187642447] [2023-08-29 23:17:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:17:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:17:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:17:16,338 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:17:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-29 23:17:16,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:17:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:17:16,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:17:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:17:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:17:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:17:16,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187642447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:17:16,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:17:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-29 23:17:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013161255] [2023-08-29 23:17:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:17:16,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:17:16,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:17:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:17:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:17:16,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:17:16,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 2505 transitions, 97649 flow. Second operand has 18 states, 18 states have (on average 182.77777777777777) internal successors, (3290), 18 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:16,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:17:16,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:17:16,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:17:34,133 INFO L130 PetriNetUnfolder]: 6941/14126 cut-off events. [2023-08-29 23:17:34,133 INFO L131 PetriNetUnfolder]: For 1480329/1480329 co-relation queries the response was YES. [2023-08-29 23:17:34,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218948 conditions, 14126 events. 6941/14126 cut-off events. For 1480329/1480329 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 134842 event pairs, 669 based on Foata normal form. 66/14192 useless extension candidates. Maximal degree in co-relation 218683. Up to 13212 conditions per place. [2023-08-29 23:17:34,531 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2381 selfloop transitions, 261 changer transitions 0/2642 dead transitions. [2023-08-29 23:17:34,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 2642 transitions, 107087 flow [2023-08-29 23:17:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:17:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:17:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3718 transitions. [2023-08-29 23:17:34,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42442922374429226 [2023-08-29 23:17:34,533 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3718 transitions. [2023-08-29 23:17:34,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3718 transitions. [2023-08-29 23:17:34,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:17:34,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3718 transitions. [2023-08-29 23:17:34,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 185.9) internal successors, (3718), 20 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:34,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:34,539 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 438.0) internal successors, (9198), 21 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:17:34,539 INFO L175 Difference]: Start difference. First operand has 800 places, 2505 transitions, 97649 flow. Second operand 20 states and 3718 transitions. [2023-08-29 23:17:34,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 2642 transitions, 107087 flow [2023-08-29 23:18:09,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 2642 transitions, 106360 flow, removed 56 selfloop flow, removed 9 redundant places. [2023-08-29 23:18:09,535 INFO L231 Difference]: Finished difference. Result has 815 places, 2588 transitions, 100949 flow [2023-08-29 23:18:09,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=96659, PETRI_DIFFERENCE_MINUEND_PLACES=788, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=100949, PETRI_PLACES=815, PETRI_TRANSITIONS=2588} [2023-08-29 23:18:09,538 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 786 predicate places. [2023-08-29 23:18:09,538 INFO L495 AbstractCegarLoop]: Abstraction has has 815 places, 2588 transitions, 100949 flow [2023-08-29 23:18:09,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.77777777777777) internal successors, (3290), 18 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:09,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:18:09,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:18:09,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-29 23:18:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-08-29 23:18:09,739 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:18:09,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:18:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash -987788263, now seen corresponding path program 70 times [2023-08-29 23:18:09,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:18:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139932615] [2023-08-29 23:18:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:18:09,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:18:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:18:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:18:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:18:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139932615] [2023-08-29 23:18:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139932615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:18:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950240325] [2023-08-29 23:18:09,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:18:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:18:09,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:18:09,829 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:18:09,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-29 23:18:09,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:18:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:18:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:18:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:18:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:18:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:18:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:18:10,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950240325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:18:10,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:18:10,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-29 23:18:10,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349797744] [2023-08-29 23:18:10,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:18:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:18:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:18:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:18:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:18:10,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:18:10,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 2588 transitions, 100949 flow. Second operand has 16 states, 16 states have (on average 182.875) internal successors, (2926), 16 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:10,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:18:10,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:18:10,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:18:29,553 INFO L130 PetriNetUnfolder]: 7065/14326 cut-off events. [2023-08-29 23:18:29,553 INFO L131 PetriNetUnfolder]: For 1449117/1449117 co-relation queries the response was YES. [2023-08-29 23:18:29,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223262 conditions, 14326 events. 7065/14326 cut-off events. For 1449117/1449117 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 136518 event pairs, 555 based on Foata normal form. 12/14338 useless extension candidates. Maximal degree in co-relation 222991. Up to 13110 conditions per place. [2023-08-29 23:18:29,949 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2392 selfloop transitions, 313 changer transitions 0/2705 dead transitions. [2023-08-29 23:18:29,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 2705 transitions, 109998 flow [2023-08-29 23:18:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:18:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:18:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2604 transitions. [2023-08-29 23:18:29,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2023-08-29 23:18:29,952 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2604 transitions. [2023-08-29 23:18:29,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2604 transitions. [2023-08-29 23:18:29,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:18:29,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2604 transitions. [2023-08-29 23:18:29,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.0) internal successors, (2604), 14 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:29,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:29,956 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 438.0) internal successors, (6570), 15 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:18:29,956 INFO L175 Difference]: Start difference. First operand has 815 places, 2588 transitions, 100949 flow. Second operand 14 states and 2604 transitions. [2023-08-29 23:18:29,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 2705 transitions, 109998 flow [2023-08-29 23:19:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 2705 transitions, 108770 flow, removed 524 selfloop flow, removed 6 redundant places. [2023-08-29 23:19:05,949 INFO L231 Difference]: Finished difference. Result has 825 places, 2643 transitions, 102908 flow [2023-08-29 23:19:05,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=99819, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=102908, PETRI_PLACES=825, PETRI_TRANSITIONS=2643} [2023-08-29 23:19:05,951 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 796 predicate places. [2023-08-29 23:19:05,951 INFO L495 AbstractCegarLoop]: Abstraction has has 825 places, 2643 transitions, 102908 flow [2023-08-29 23:19:05,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.875) internal successors, (2926), 16 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:05,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:19:05,952 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:19:05,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-29 23:19:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:19:06,157 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:19:06,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:19:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2053066874, now seen corresponding path program 71 times [2023-08-29 23:19:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:19:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108805945] [2023-08-29 23:19:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:19:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:19:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:19:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:06,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:19:06,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108805945] [2023-08-29 23:19:06,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108805945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:19:06,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379136120] [2023-08-29 23:19:06,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:19:06,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:19:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:19:06,220 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:19:06,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-29 23:19:06,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-29 23:19:06,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:19:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:19:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:19:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:06,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:19:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:06,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379136120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:19:06,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:19:06,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-29 23:19:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711227614] [2023-08-29 23:19:06,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:19:06,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:19:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:19:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:19:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:19:06,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:19:06,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 2643 transitions, 102908 flow. Second operand has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:06,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:19:06,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:19:06,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:19:25,119 INFO L130 PetriNetUnfolder]: 7063/14332 cut-off events. [2023-08-29 23:19:25,119 INFO L131 PetriNetUnfolder]: For 1440970/1440970 co-relation queries the response was YES. [2023-08-29 23:19:25,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223206 conditions, 14332 events. 7063/14332 cut-off events. For 1440970/1440970 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 137065 event pairs, 1233 based on Foata normal form. 4/14336 useless extension candidates. Maximal degree in co-relation 222929. Up to 5055 conditions per place. [2023-08-29 23:19:25,402 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1786 selfloop transitions, 936 changer transitions 4/2726 dead transitions. [2023-08-29 23:19:25,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 2726 transitions, 109568 flow [2023-08-29 23:19:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-29 23:19:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-29 23:19:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4826 transitions. [2023-08-29 23:19:25,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377941693010185 [2023-08-29 23:19:25,405 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4826 transitions. [2023-08-29 23:19:25,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4826 transitions. [2023-08-29 23:19:25,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:19:25,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4826 transitions. [2023-08-29 23:19:25,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 185.6153846153846) internal successors, (4826), 26 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:25,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:25,413 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 438.0) internal successors, (11826), 27 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:25,413 INFO L175 Difference]: Start difference. First operand has 825 places, 2643 transitions, 102908 flow. Second operand 26 states and 4826 transitions. [2023-08-29 23:19:25,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 2726 transitions, 109568 flow [2023-08-29 23:19:59,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 2726 transitions, 109316 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-08-29 23:19:59,650 INFO L231 Difference]: Finished difference. Result has 849 places, 2643 transitions, 104715 flow [2023-08-29 23:19:59,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=102636, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=104715, PETRI_PLACES=849, PETRI_TRANSITIONS=2643} [2023-08-29 23:19:59,652 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 820 predicate places. [2023-08-29 23:19:59,652 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 2643 transitions, 104715 flow [2023-08-29 23:19:59,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 182.75) internal successors, (2924), 16 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:19:59,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:19:59,652 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:19:59,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-29 23:19:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:19:59,853 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:19:59,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:19:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 307762137, now seen corresponding path program 72 times [2023-08-29 23:19:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:19:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495882671] [2023-08-29 23:19:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:19:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:19:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:19:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:19:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:19:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495882671] [2023-08-29 23:19:59,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495882671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:19:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36371933] [2023-08-29 23:19:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:19:59,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:19:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:19:59,915 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:19:59,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-29 23:20:00,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:20:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:20:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:20:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:20:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:20:00,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:20:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:20:00,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36371933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:20:00,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:20:00,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-29 23:20:00,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583120601] [2023-08-29 23:20:00,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:20:00,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:20:00,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:20:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:20:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:20:00,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:20:00,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 2643 transitions, 104715 flow. Second operand has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:00,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:20:00,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:20:00,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:20:16,728 INFO L130 PetriNetUnfolder]: 7206/14623 cut-off events. [2023-08-29 23:20:16,729 INFO L131 PetriNetUnfolder]: For 1575523/1575523 co-relation queries the response was YES. [2023-08-29 23:20:16,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232343 conditions, 14623 events. 7206/14623 cut-off events. For 1575523/1575523 co-relation queries the response was YES. Maximal size of possible extension queue 1343. Compared 139923 event pairs, 511 based on Foata normal form. 92/14715 useless extension candidates. Maximal degree in co-relation 232063. Up to 10846 conditions per place. [2023-08-29 23:20:17,155 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 2058 selfloop transitions, 779 changer transitions 0/2837 dead transitions. [2023-08-29 23:20:17,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 868 places, 2837 transitions, 116256 flow [2023-08-29 23:20:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 23:20:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 23:20:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4114 transitions. [2023-08-29 23:20:17,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269406392694064 [2023-08-29 23:20:17,160 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4114 transitions. [2023-08-29 23:20:17,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4114 transitions. [2023-08-29 23:20:17,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:20:17,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4114 transitions. [2023-08-29 23:20:17,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 187.0) internal successors, (4114), 22 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,170 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 438.0) internal successors, (10074), 23 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:17,171 INFO L175 Difference]: Start difference. First operand has 849 places, 2643 transitions, 104715 flow. Second operand 22 states and 4114 transitions. [2023-08-29 23:20:17,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 868 places, 2837 transitions, 116256 flow [2023-08-29 23:20:54,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 2837 transitions, 114223 flow, removed 132 selfloop flow, removed 16 redundant places. [2023-08-29 23:20:54,842 INFO L231 Difference]: Finished difference. Result has 859 places, 2708 transitions, 107910 flow [2023-08-29 23:20:54,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=102131, PETRI_DIFFERENCE_MINUEND_PLACES=831, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=107910, PETRI_PLACES=859, PETRI_TRANSITIONS=2708} [2023-08-29 23:20:54,845 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 830 predicate places. [2023-08-29 23:20:54,845 INFO L495 AbstractCegarLoop]: Abstraction has has 859 places, 2708 transitions, 107910 flow [2023-08-29 23:20:54,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 182.86666666666667) internal successors, (2743), 15 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:54,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:20:54,846 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:20:54,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-08-29 23:20:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:20:55,052 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:20:55,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:20:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash -651354091, now seen corresponding path program 73 times [2023-08-29 23:20:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:20:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930932152] [2023-08-29 23:20:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:20:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:20:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:20:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:20:55,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:20:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930932152] [2023-08-29 23:20:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930932152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:20:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122402280] [2023-08-29 23:20:55,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:20:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:20:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:20:55,139 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:20:55,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-29 23:20:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:20:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-29 23:20:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:20:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:20:55,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:20:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:20:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122402280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:20:55,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:20:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-08-29 23:20:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175416267] [2023-08-29 23:20:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:20:55,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:20:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:20:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:20:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:20:55,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 438 [2023-08-29 23:20:55,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 2708 transitions, 107910 flow. Second operand has 16 states, 16 states have (on average 182.9375) internal successors, (2927), 16 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:20:55,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:20:55,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 438 [2023-08-29 23:20:55,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:21:16,279 INFO L130 PetriNetUnfolder]: 7159/14564 cut-off events. [2023-08-29 23:21:16,279 INFO L131 PetriNetUnfolder]: For 1528697/1528697 co-relation queries the response was YES. [2023-08-29 23:21:16,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231726 conditions, 14564 events. 7159/14564 cut-off events. For 1528697/1528697 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 139503 event pairs, 343 based on Foata normal form. 68/14632 useless extension candidates. Maximal degree in co-relation 231441. Up to 7221 conditions per place. [2023-08-29 23:21:16,604 INFO L137 encePairwiseOnDemand]: 432/438 looper letters, 1778 selfloop transitions, 1012 changer transitions 7/2797 dead transitions. [2023-08-29 23:21:16,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 2797 transitions, 115331 flow [2023-08-29 23:21:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 23:21:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 23:21:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5556 transitions. [2023-08-29 23:21:16,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228310502283105 [2023-08-29 23:21:16,607 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5556 transitions. [2023-08-29 23:21:16,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5556 transitions. [2023-08-29 23:21:16,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:21:16,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5556 transitions. [2023-08-29 23:21:16,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 185.2) internal successors, (5556), 30 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:16,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 438.0) internal successors, (13578), 31 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:16,616 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 438.0) internal successors, (13578), 31 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:16,616 INFO L175 Difference]: Start difference. First operand has 859 places, 2708 transitions, 107910 flow. Second operand 30 states and 5556 transitions. [2023-08-29 23:21:16,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 2797 transitions, 115331 flow Killed by 15