./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 03:40:04,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:40:04,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:40:04,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:40:04,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:40:04,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:40:04,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:40:04,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:40:04,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:40:04,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:40:04,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:40:04,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:40:04,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:40:04,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:40:04,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:40:04,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:40:04,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:40:04,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:40:04,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:40:04,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:40:04,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:40:04,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:40:04,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:40:04,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:40:04,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:40:04,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:40:04,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:40:04,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:40:04,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:40:04,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:40:04,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:40:04,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:40:04,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:40:04,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:40:04,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:40:04,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:40:04,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:40:04,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:40:04,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:40:04,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:40:04,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:40:04,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:40:04,352 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:40:04,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:40:04,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:40:04,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:40:04,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:40:04,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:40:04,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:40:04,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:40:04,355 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:40:04,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:40:04,356 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:40:04,356 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:40:04,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:40:04,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:40:04,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:40:04,357 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:40:04,357 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:40:04,358 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:40:04,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:40:04,358 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:40:04,358 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:40:04,358 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:40:04,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:40:04,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:40:04,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:40:04,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:40:04,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:40:04,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:40:04,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:40:04,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:40:04,360 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:40:04,360 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:40:04,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:40:04,361 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:40:04,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:40:04,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:40:04,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:40:04,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:40:04,683 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:40:04,684 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:40:04,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-30 03:40:05,872 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:40:06,171 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:40:06,172 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-30 03:40:06,198 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d4318e3/31c4d29522fd413d8992df967091efb4/FLAGb2da97612 [2023-08-30 03:40:06,218 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d4318e3/31c4d29522fd413d8992df967091efb4 [2023-08-30 03:40:06,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:40:06,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:40:06,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:40:06,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:40:06,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:40:06,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aff27b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06, skipping insertion in model container [2023-08-30 03:40:06,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:40:06,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:40:06,413 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-08-30 03:40:06,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:40:06,672 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:40:06,685 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-08-30 03:40:06,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:40:06,828 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:40:06,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06 WrapperNode [2023-08-30 03:40:06,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:40:06,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:40:06,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:40:06,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:40:06,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,880 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-08-30 03:40:06,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:40:06,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:40:06,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:40:06,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:40:06,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:40:06,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:40:06,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:40:06,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:40:06,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (1/1) ... [2023-08-30 03:40:06,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:40:06,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:06,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 03:40:06,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 03:40:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:40:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:40:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:40:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:40:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 03:40:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:40:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-08-30 03:40:06,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-08-30 03:40:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 03:40:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:40:06,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:40:06,983 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 03:40:07,179 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:40:07,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:40:07,359 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:40:07,365 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:40:07,367 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 03:40:07,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:40:07 BoogieIcfgContainer [2023-08-30 03:40:07,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:40:07,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:40:07,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:40:07,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:40:07,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:40:06" (1/3) ... [2023-08-30 03:40:07,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55820acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:40:07, skipping insertion in model container [2023-08-30 03:40:07,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:40:06" (2/3) ... [2023-08-30 03:40:07,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55820acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:40:07, skipping insertion in model container [2023-08-30 03:40:07,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:40:07" (3/3) ... [2023-08-30 03:40:07,379 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-08-30 03:40:07,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:40:07,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 03:40:07,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:40:07,469 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 03:40:07,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 94 transitions, 196 flow [2023-08-30 03:40:07,580 INFO L130 PetriNetUnfolder]: 7/93 cut-off events. [2023-08-30 03:40:07,581 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 03:40:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 93 events. 7/93 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-30 03:40:07,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 94 transitions, 196 flow [2023-08-30 03:40:07,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 89 transitions, 184 flow [2023-08-30 03:40:07,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:40:07,613 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 89 transitions, 184 flow [2023-08-30 03:40:07,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 89 transitions, 184 flow [2023-08-30 03:40:07,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 89 transitions, 184 flow [2023-08-30 03:40:07,641 INFO L130 PetriNetUnfolder]: 7/89 cut-off events. [2023-08-30 03:40:07,642 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 03:40:07,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 89 events. 7/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-30 03:40:07,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 798 [2023-08-30 03:40:09,807 INFO L134 LiptonReduction]: Checked pairs total: 1058 [2023-08-30 03:40:09,807 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-08-30 03:40:09,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:40:09,824 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;@578cb9e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:40:09,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 03:40:09,826 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 03:40:09,826 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:40:09,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:09,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 03:40:09,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:09,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 361, now seen corresponding path program 1 times [2023-08-30 03:40:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:09,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582924824] [2023-08-30 03:40:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:09,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582924824] [2023-08-30 03:40:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582924824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:40:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:40:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 03:40:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280387585] [2023-08-30 03:40:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:40:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:40:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:40:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:40:10,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2023-08-30 03:40:10,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:10,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2023-08-30 03:40:10,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:10,075 INFO L130 PetriNetUnfolder]: 37/78 cut-off events. [2023-08-30 03:40:10,075 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 03:40:10,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 78 events. 37/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 25 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 146. Up to 77 conditions per place. [2023-08-30 03:40:10,078 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 16 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-30 03:40:10,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 72 flow [2023-08-30 03:40:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:40:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:40:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 187 transitions. [2023-08-30 03:40:10,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081521739130435 [2023-08-30 03:40:10,091 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 187 transitions. [2023-08-30 03:40:10,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 187 transitions. [2023-08-30 03:40:10,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:10,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 187 transitions. [2023-08-30 03:40:10,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,106 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,108 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 2 states and 187 transitions. [2023-08-30 03:40:10,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 72 flow [2023-08-30 03:40:10,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:40:10,111 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 36 flow [2023-08-30 03:40:10,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-08-30 03:40:10,116 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -4 predicate places. [2023-08-30 03:40:10,116 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 36 flow [2023-08-30 03:40:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:10,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:40:10,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:40:10,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:10,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 11025112, now seen corresponding path program 1 times [2023-08-30 03:40:10,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:10,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779288630] [2023-08-30 03:40:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:10,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:10,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779288630] [2023-08-30 03:40:10,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779288630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:40:10,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:40:10,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:40:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222888593] [2023-08-30 03:40:10,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:40:10,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:40:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:40:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:40:10,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-30 03:40:10,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:10,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-30 03:40:10,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:10,299 INFO L130 PetriNetUnfolder]: 49/112 cut-off events. [2023-08-30 03:40:10,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:40:10,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 49/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 387 event pairs, 25 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 213. Up to 77 conditions per place. [2023-08-30 03:40:10,301 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-30 03:40:10,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 100 flow [2023-08-30 03:40:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:40:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:40:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-08-30 03:40:10,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-08-30 03:40:10,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-08-30 03:40:10,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-08-30 03:40:10,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:10,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-08-30 03:40:10,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,310 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 36 flow. Second operand 3 states and 264 transitions. [2023-08-30 03:40:10,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 100 flow [2023-08-30 03:40:10,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:40:10,311 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 52 flow [2023-08-30 03:40:10,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-30 03:40:10,312 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-30 03:40:10,312 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 52 flow [2023-08-30 03:40:10,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:10,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:10,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:40:10,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:10,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2031391342, now seen corresponding path program 1 times [2023-08-30 03:40:10,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:10,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534013069] [2023-08-30 03:40:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:10,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534013069] [2023-08-30 03:40:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534013069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520803275] [2023-08-30 03:40:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:10,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:10,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:40:10,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 03:40:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 03:40:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:10,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520803275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:10,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:10,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 03:40:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916593576] [2023-08-30 03:40:10,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:40:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:40:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 03:40:10,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2023-08-30 03:40:10,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:10,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2023-08-30 03:40:10,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:10,722 INFO L130 PetriNetUnfolder]: 79/184 cut-off events. [2023-08-30 03:40:10,722 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 03:40:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 79/184 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 555 event pairs, 20 based on Foata normal form. 18/177 useless extension candidates. Maximal degree in co-relation 399. Up to 59 conditions per place. [2023-08-30 03:40:10,724 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 41 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-08-30 03:40:10,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 48 transitions, 210 flow [2023-08-30 03:40:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:40:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:40:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 524 transitions. [2023-08-30 03:40:10,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746376811594203 [2023-08-30 03:40:10,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 524 transitions. [2023-08-30 03:40:10,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 524 transitions. [2023-08-30 03:40:10,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:10,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 524 transitions. [2023-08-30 03:40:10,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.33333333333333) internal successors, (524), 6 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,731 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,731 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 52 flow. Second operand 6 states and 524 transitions. [2023-08-30 03:40:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 48 transitions, 210 flow [2023-08-30 03:40:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:10,732 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 102 flow [2023-08-30 03:40:10,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-30 03:40:10,733 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2023-08-30 03:40:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 102 flow [2023-08-30 03:40:10,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:10,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:10,734 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-30 03:40:10,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 03:40:10,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:10,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:10,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1325181784, now seen corresponding path program 2 times [2023-08-30 03:40:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:10,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579113953] [2023-08-30 03:40:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:10,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-30 03:40:11,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:11,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579113953] [2023-08-30 03:40:11,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579113953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:40:11,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:40:11,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:40:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286327767] [2023-08-30 03:40:11,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:40:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:40:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:40:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:40:11,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 184 [2023-08-30 03:40:11,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:11,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 184 [2023-08-30 03:40:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:11,183 INFO L130 PetriNetUnfolder]: 73/156 cut-off events. [2023-08-30 03:40:11,185 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-30 03:40:11,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 156 events. 73/156 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 451 event pairs, 55 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 473. Up to 148 conditions per place. [2023-08-30 03:40:11,189 INFO L137 encePairwiseOnDemand]: 182/184 looper letters, 18 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-30 03:40:11,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 130 flow [2023-08-30 03:40:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:40:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:40:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-08-30 03:40:11,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420289855072464 [2023-08-30 03:40:11,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-08-30 03:40:11,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-08-30 03:40:11,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:11,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-08-30 03:40:11,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,195 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 102 flow. Second operand 3 states and 244 transitions. [2023-08-30 03:40:11,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 130 flow [2023-08-30 03:40:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 122 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:11,198 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 86 flow [2023-08-30 03:40:11,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-30 03:40:11,200 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2023-08-30 03:40:11,200 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 86 flow [2023-08-30 03:40:11,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:11,201 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-30 03:40:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 03:40:11,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:11,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1325181785, now seen corresponding path program 1 times [2023-08-30 03:40:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:11,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736275515] [2023-08-30 03:40:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:11,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:11,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:11,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736275515] [2023-08-30 03:40:11,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736275515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:11,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577859736] [2023-08-30 03:40:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:11,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:40:11,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 03:40:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:40:11,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:11,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:11,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577859736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:11,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:11,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 03:40:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942056648] [2023-08-30 03:40:11,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 03:40:11,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 03:40:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 03:40:11,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2023-08-30 03:40:11,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 86 flow. Second operand has 13 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:11,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2023-08-30 03:40:11,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:11,709 INFO L130 PetriNetUnfolder]: 145/352 cut-off events. [2023-08-30 03:40:11,709 INFO L131 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2023-08-30 03:40:11,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 352 events. 145/352 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1046 event pairs, 15 based on Foata normal form. 36/358 useless extension candidates. Maximal degree in co-relation 934. Up to 72 conditions per place. [2023-08-30 03:40:11,711 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 82 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2023-08-30 03:40:11,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 95 transitions, 478 flow [2023-08-30 03:40:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:40:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:40:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1042 transitions. [2023-08-30 03:40:11,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47192028985507245 [2023-08-30 03:40:11,714 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1042 transitions. [2023-08-30 03:40:11,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1042 transitions. [2023-08-30 03:40:11,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:11,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1042 transitions. [2023-08-30 03:40:11,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.83333333333333) internal successors, (1042), 12 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,721 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,721 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 86 flow. Second operand 12 states and 1042 transitions. [2023-08-30 03:40:11,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 95 transitions, 478 flow [2023-08-30 03:40:11,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 95 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:11,725 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 193 flow [2023-08-30 03:40:11,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=193, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-30 03:40:11,726 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2023-08-30 03:40:11,726 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 193 flow [2023-08-30 03:40:11,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 79.92307692307692) internal successors, (1039), 13 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:11,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:11,727 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2023-08-30 03:40:11,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 03:40:11,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:11,933 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:11,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash -291476455, now seen corresponding path program 2 times [2023-08-30 03:40:11,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:11,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654634744] [2023-08-30 03:40:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:12,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:12,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654634744] [2023-08-30 03:40:12,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654634744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:12,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915327828] [2023-08-30 03:40:12,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:40:12,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:12,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:12,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 03:40:12,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 03:40:12,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 03:40:12,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:40:12,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 03:40:12,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:12,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 03:40:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-08-30 03:40:12,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 03:40:12,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915327828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:40:12,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 03:40:12,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [12] total 13 [2023-08-30 03:40:12,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148459588] [2023-08-30 03:40:12,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:40:12,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:40:12,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:40:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-08-30 03:40:12,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-30 03:40:12,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:12,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-30 03:40:12,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:12,554 INFO L130 PetriNetUnfolder]: 139/324 cut-off events. [2023-08-30 03:40:12,554 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-08-30 03:40:12,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 324 events. 139/324 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 947 event pairs, 110 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 1062. Up to 280 conditions per place. [2023-08-30 03:40:12,557 INFO L137 encePairwiseOnDemand]: 182/184 looper letters, 24 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 03:40:12,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 26 transitions, 221 flow [2023-08-30 03:40:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:40:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:40:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-30 03:40:12,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2023-08-30 03:40:12,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-30 03:40:12,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-30 03:40:12,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:12,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-30 03:40:12,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,561 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 193 flow. Second operand 3 states and 252 transitions. [2023-08-30 03:40:12,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 26 transitions, 221 flow [2023-08-30 03:40:12,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 03:40:12,565 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 167 flow [2023-08-30 03:40:12,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-30 03:40:12,565 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2023-08-30 03:40:12,566 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 167 flow [2023-08-30 03:40:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:12,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 03:40:12,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:12,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:12,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1834541916, now seen corresponding path program 1 times [2023-08-30 03:40:12,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:12,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702178666] [2023-08-30 03:40:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-30 03:40:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702178666] [2023-08-30 03:40:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702178666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:40:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:40:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:40:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277496115] [2023-08-30 03:40:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:40:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:40:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:40:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:40:12,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 184 [2023-08-30 03:40:12,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:12,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 184 [2023-08-30 03:40:12,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:12,938 INFO L130 PetriNetUnfolder]: 231/532 cut-off events. [2023-08-30 03:40:12,938 INFO L131 PetriNetUnfolder]: For 1174/1174 co-relation queries the response was YES. [2023-08-30 03:40:12,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 532 events. 231/532 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1943 event pairs, 137 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 1729. Up to 281 conditions per place. [2023-08-30 03:40:12,942 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 42 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 03:40:12,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 403 flow [2023-08-30 03:40:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:40:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:40:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-08-30 03:40:12,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47644927536231885 [2023-08-30 03:40:12,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-08-30 03:40:12,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-08-30 03:40:12,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:12,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-08-30 03:40:12,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,967 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 167 flow. Second operand 3 states and 263 transitions. [2023-08-30 03:40:12,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 403 flow [2023-08-30 03:40:12,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:12,972 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 178 flow [2023-08-30 03:40:12,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-30 03:40:12,972 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2023-08-30 03:40:12,973 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 178 flow [2023-08-30 03:40:12,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:12,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:12,973 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:12,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:40:12,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:12,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash 514079677, now seen corresponding path program 1 times [2023-08-30 03:40:12,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:12,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116579502] [2023-08-30 03:40:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:12,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-08-30 03:40:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:13,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116579502] [2023-08-30 03:40:13,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116579502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:40:13,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:40:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:40:13,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662526243] [2023-08-30 03:40:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:40:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:40:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:40:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:40:13,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-30 03:40:13,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:13,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-30 03:40:13,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:13,181 INFO L130 PetriNetUnfolder]: 85/298 cut-off events. [2023-08-30 03:40:13,181 INFO L131 PetriNetUnfolder]: For 1214/1214 co-relation queries the response was YES. [2023-08-30 03:40:13,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 298 events. 85/298 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 946 event pairs, 36 based on Foata normal form. 86/384 useless extension candidates. Maximal degree in co-relation 1014. Up to 154 conditions per place. [2023-08-30 03:40:13,183 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 14 selfloop transitions, 16 changer transitions 0/31 dead transitions. [2023-08-30 03:40:13,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 31 transitions, 277 flow [2023-08-30 03:40:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:40:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:40:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 03:40:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46557971014492755 [2023-08-30 03:40:13,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 03:40:13,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 03:40:13,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:13,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 03:40:13,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,188 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 178 flow. Second operand 3 states and 257 transitions. [2023-08-30 03:40:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 31 transitions, 277 flow [2023-08-30 03:40:13,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 31 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:13,192 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 208 flow [2023-08-30 03:40:13,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-08-30 03:40:13,195 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-08-30 03:40:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 208 flow [2023-08-30 03:40:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:13,195 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:40:13,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:13,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1311206625, now seen corresponding path program 2 times [2023-08-30 03:40:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651759654] [2023-08-30 03:40:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-30 03:40:13,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651759654] [2023-08-30 03:40:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651759654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36703289] [2023-08-30 03:40:13,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:40:13,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:13,309 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) [2023-08-30 03:40:13,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 03:40:13,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 03:40:13,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:40:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 03:40:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-30 03:40:13,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-08-30 03:40:13,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36703289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:13,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:13,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 03:40:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922284277] [2023-08-30 03:40:13,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:13,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 03:40:13,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 03:40:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 03:40:13,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-30 03:40:13,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:13,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-30 03:40:13,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:13,587 INFO L130 PetriNetUnfolder]: 136/512 cut-off events. [2023-08-30 03:40:13,587 INFO L131 PetriNetUnfolder]: For 2306/2306 co-relation queries the response was YES. [2023-08-30 03:40:13,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 512 events. 136/512 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2222 event pairs, 25 based on Foata normal form. 69/581 useless extension candidates. Maximal degree in co-relation 2000. Up to 142 conditions per place. [2023-08-30 03:40:13,591 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 92 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-08-30 03:40:13,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 99 transitions, 1108 flow [2023-08-30 03:40:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 03:40:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 03:40:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2023-08-30 03:40:13,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47101449275362317 [2023-08-30 03:40:13,593 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2023-08-30 03:40:13,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2023-08-30 03:40:13,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:13,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2023-08-30 03:40:13,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,597 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 208 flow. Second operand 6 states and 520 transitions. [2023-08-30 03:40:13,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 99 transitions, 1108 flow [2023-08-30 03:40:13,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 99 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:13,602 INFO L231 Difference]: Finished difference. Result has 55 places, 30 transitions, 235 flow [2023-08-30 03:40:13,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=55, PETRI_TRANSITIONS=30} [2023-08-30 03:40:13,603 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 33 predicate places. [2023-08-30 03:40:13,603 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 30 transitions, 235 flow [2023-08-30 03:40:13,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:13,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:13,603 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:13,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 03:40:13,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:13,810 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:13,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1535673350, now seen corresponding path program 3 times [2023-08-30 03:40:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112226182] [2023-08-30 03:40:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:13,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-08-30 03:40:13,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:13,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112226182] [2023-08-30 03:40:13,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112226182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:13,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863145075] [2023-08-30 03:40:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 03:40:13,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:13,953 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) [2023-08-30 03:40:13,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 03:40:14,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 03:40:14,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:40:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 03:40:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-08-30 03:40:14,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-08-30 03:40:14,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863145075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:14,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:14,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 03:40:14,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125747952] [2023-08-30 03:40:14,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:14,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 03:40:14,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:14,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 03:40:14,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 03:40:14,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-30 03:40:14,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 30 transitions, 235 flow. Second operand has 13 states, 13 states have (on average 83.23076923076923) internal successors, (1082), 13 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:14,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:14,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-30 03:40:14,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:14,525 INFO L130 PetriNetUnfolder]: 250/1058 cut-off events. [2023-08-30 03:40:14,525 INFO L131 PetriNetUnfolder]: For 5495/5495 co-relation queries the response was YES. [2023-08-30 03:40:14,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4395 conditions, 1058 events. 250/1058 cut-off events. For 5495/5495 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5529 event pairs, 25 based on Foata normal form. 138/1196 useless extension candidates. Maximal degree in co-relation 4374. Up to 261 conditions per place. [2023-08-30 03:40:14,534 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 200 selfloop transitions, 12 changer transitions 0/213 dead transitions. [2023-08-30 03:40:14,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 213 transitions, 2336 flow [2023-08-30 03:40:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 03:40:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 03:40:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1045 transitions. [2023-08-30 03:40:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732789855072464 [2023-08-30 03:40:14,537 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1045 transitions. [2023-08-30 03:40:14,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1045 transitions. [2023-08-30 03:40:14,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:14,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1045 transitions. [2023-08-30 03:40:14,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 87.08333333333333) internal successors, (1045), 12 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:14,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:14,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:14,544 INFO L175 Difference]: Start difference. First operand has 55 places, 30 transitions, 235 flow. Second operand 12 states and 1045 transitions. [2023-08-30 03:40:14,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 213 transitions, 2336 flow [2023-08-30 03:40:14,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 213 transitions, 2316 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 03:40:14,555 INFO L231 Difference]: Finished difference. Result has 72 places, 37 transitions, 330 flow [2023-08-30 03:40:14,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=72, PETRI_TRANSITIONS=37} [2023-08-30 03:40:14,556 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-08-30 03:40:14,556 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 37 transitions, 330 flow [2023-08-30 03:40:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.23076923076923) internal successors, (1082), 13 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:14,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:14,557 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:14,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 03:40:14,762 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,SelfDestructingSolverStorable9 [2023-08-30 03:40:14,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:14,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -204718828, now seen corresponding path program 4 times [2023-08-30 03:40:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:14,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234211895] [2023-08-30 03:40:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-08-30 03:40:15,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:15,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234211895] [2023-08-30 03:40:15,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234211895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:15,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664411286] [2023-08-30 03:40:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 03:40:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:15,036 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) [2023-08-30 03:40:15,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 03:40:15,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 03:40:15,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:40:15,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 03:40:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-08-30 03:40:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-08-30 03:40:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664411286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:15,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-08-30 03:40:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323095608] [2023-08-30 03:40:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 03:40:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 03:40:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-30 03:40:15,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 184 [2023-08-30 03:40:15,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 37 transitions, 330 flow. Second operand has 23 states, 23 states have (on average 83.34782608695652) internal successors, (1917), 23 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:15,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:15,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 184 [2023-08-30 03:40:15,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:16,189 INFO L130 PetriNetUnfolder]: 440/1962 cut-off events. [2023-08-30 03:40:16,189 INFO L131 PetriNetUnfolder]: For 20033/20033 co-relation queries the response was YES. [2023-08-30 03:40:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8862 conditions, 1962 events. 440/1962 cut-off events. For 20033/20033 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 11067 event pairs, 34 based on Foata normal form. 230/2192 useless extension candidates. Maximal degree in co-relation 8834. Up to 491 conditions per place. [2023-08-30 03:40:16,204 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 380 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2023-08-30 03:40:16,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 403 transitions, 4550 flow [2023-08-30 03:40:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 03:40:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 03:40:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1919 transitions. [2023-08-30 03:40:16,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740612648221344 [2023-08-30 03:40:16,210 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1919 transitions. [2023-08-30 03:40:16,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1919 transitions. [2023-08-30 03:40:16,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:16,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1919 transitions. [2023-08-30 03:40:16,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.22727272727273) internal successors, (1919), 22 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:16,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:16,220 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:16,221 INFO L175 Difference]: Start difference. First operand has 72 places, 37 transitions, 330 flow. Second operand 22 states and 1919 transitions. [2023-08-30 03:40:16,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 403 transitions, 4550 flow [2023-08-30 03:40:16,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 403 transitions, 4544 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 03:40:16,240 INFO L231 Difference]: Finished difference. Result has 101 places, 48 transitions, 535 flow [2023-08-30 03:40:16,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=535, PETRI_PLACES=101, PETRI_TRANSITIONS=48} [2023-08-30 03:40:16,241 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2023-08-30 03:40:16,241 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 48 transitions, 535 flow [2023-08-30 03:40:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 83.34782608695652) internal successors, (1917), 23 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:16,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:16,243 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:16,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 03:40:16,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:16,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:16,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1101720572, now seen corresponding path program 5 times [2023-08-30 03:40:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:16,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341151453] [2023-08-30 03:40:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 20 proven. 145 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-08-30 03:40:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:16,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341151453] [2023-08-30 03:40:16,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341151453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:16,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910096788] [2023-08-30 03:40:16,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 03:40:16,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:16,845 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) [2023-08-30 03:40:16,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 03:40:17,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-08-30 03:40:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:40:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 03:40:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 20 proven. 145 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-08-30 03:40:17,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 20 proven. 145 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-08-30 03:40:17,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910096788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:17,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:17,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-08-30 03:40:17,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40208818] [2023-08-30 03:40:17,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:17,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 03:40:17,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 03:40:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-30 03:40:17,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2023-08-30 03:40:17,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 48 transitions, 535 flow. Second operand has 23 states, 23 states have (on average 80.3913043478261) internal successors, (1849), 23 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:17,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:17,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2023-08-30 03:40:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:40:18,281 INFO L130 PetriNetUnfolder]: 690/3522 cut-off events. [2023-08-30 03:40:18,282 INFO L131 PetriNetUnfolder]: For 68098/68098 co-relation queries the response was YES. [2023-08-30 03:40:18,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17106 conditions, 3522 events. 690/3522 cut-off events. For 68098/68098 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 24121 event pairs, 104 based on Foata normal form. 830/4352 useless extension candidates. Maximal degree in co-relation 17067. Up to 921 conditions per place. [2023-08-30 03:40:18,313 INFO L137 encePairwiseOnDemand]: 180/184 looper letters, 613 selfloop transitions, 22 changer transitions 0/636 dead transitions. [2023-08-30 03:40:18,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 636 transitions, 9445 flow [2023-08-30 03:40:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 03:40:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 03:40:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1899 transitions. [2023-08-30 03:40:18,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691205533596838 [2023-08-30 03:40:18,320 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1899 transitions. [2023-08-30 03:40:18,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1899 transitions. [2023-08-30 03:40:18,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:40:18,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1899 transitions. [2023-08-30 03:40:18,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.31818181818181) internal successors, (1899), 22 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:18,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:18,331 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 184.0) internal successors, (4232), 23 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:18,332 INFO L175 Difference]: Start difference. First operand has 101 places, 48 transitions, 535 flow. Second operand 22 states and 1899 transitions. [2023-08-30 03:40:18,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 636 transitions, 9445 flow [2023-08-30 03:40:18,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 636 transitions, 9067 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 03:40:18,389 INFO L231 Difference]: Finished difference. Result has 124 places, 59 transitions, 728 flow [2023-08-30 03:40:18,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=728, PETRI_PLACES=124, PETRI_TRANSITIONS=59} [2023-08-30 03:40:18,390 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 102 predicate places. [2023-08-30 03:40:18,390 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 59 transitions, 728 flow [2023-08-30 03:40:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 80.3913043478261) internal successors, (1849), 23 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:18,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:40:18,391 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:40:18,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 03:40:18,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:18,598 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:40:18,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:40:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1303140678, now seen corresponding path program 6 times [2023-08-30 03:40:18,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:40:18,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200665716] [2023-08-30 03:40:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:40:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:40:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:40:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:40:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200665716] [2023-08-30 03:40:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200665716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:40:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219053350] [2023-08-30 03:40:22,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 03:40:22,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:40:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:40:22,945 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) [2023-08-30 03:40:22,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 03:40:23,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-08-30 03:40:23,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:40:23,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 03:40:23,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:40:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:23,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:40:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:40:24,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219053350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:40:24,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:40:24,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 03:40:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380798584] [2023-08-30 03:40:24,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:40:24,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 03:40:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:40:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 03:40:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 03:40:25,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-30 03:40:25,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 59 transitions, 728 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:40:25,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:40:25,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-30 03:40:25,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:41:04,051 INFO L130 PetriNetUnfolder]: 6510/20606 cut-off events. [2023-08-30 03:41:04,051 INFO L131 PetriNetUnfolder]: For 815463/815463 co-relation queries the response was YES. [2023-08-30 03:41:04,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166620 conditions, 20606 events. 6510/20606 cut-off events. For 815463/815463 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 201527 event pairs, 2026 based on Foata normal form. 1/20607 useless extension candidates. Maximal degree in co-relation 166570. Up to 6000 conditions per place. [2023-08-30 03:41:04,556 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 1653 selfloop transitions, 521 changer transitions 1/2175 dead transitions. [2023-08-30 03:41:04,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2175 transitions, 31062 flow [2023-08-30 03:41:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2023-08-30 03:41:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2023-08-30 03:41:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 22640 transitions. [2023-08-30 03:41:04,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523657289002558 [2023-08-30 03:41:04,606 INFO L72 ComplementDD]: Start complementDD. Operand 272 states and 22640 transitions. [2023-08-30 03:41:04,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 22640 transitions. [2023-08-30 03:41:04,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:41:04,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 272 states and 22640 transitions. [2023-08-30 03:41:04,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 273 states, 272 states have (on average 83.23529411764706) internal successors, (22640), 272 states have internal predecessors, (22640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:41:04,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 273 states, 273 states have (on average 184.0) internal successors, (50232), 273 states have internal predecessors, (50232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:41:04,770 INFO L81 ComplementDD]: Finished complementDD. Result has 273 states, 273 states have (on average 184.0) internal successors, (50232), 273 states have internal predecessors, (50232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:41:04,770 INFO L175 Difference]: Start difference. First operand has 124 places, 59 transitions, 728 flow. Second operand 272 states and 22640 transitions. [2023-08-30 03:41:04,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2175 transitions, 31062 flow [2023-08-30 03:41:14,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 2175 transitions, 31026 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 03:41:14,907 INFO L231 Difference]: Finished difference. Result has 387 places, 638 transitions, 3059 flow [2023-08-30 03:41:14,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=272, PETRI_FLOW=3059, PETRI_PLACES=387, PETRI_TRANSITIONS=638} [2023-08-30 03:41:14,908 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 365 predicate places. [2023-08-30 03:41:14,908 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 638 transitions, 3059 flow [2023-08-30 03:41:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:41:14,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:41:14,910 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:41:14,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 03:41:15,117 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,SelfDestructingSolverStorable12 [2023-08-30 03:41:15,117 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:41:15,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:41:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1965990962, now seen corresponding path program 7 times [2023-08-30 03:41:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:41:15,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621020235] [2023-08-30 03:41:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:41:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:41:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:41:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:41:18,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:41:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621020235] [2023-08-30 03:41:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621020235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:41:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074330341] [2023-08-30 03:41:18,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 03:41:18,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:41:18,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:41:18,677 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) [2023-08-30 03:41:18,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 03:41:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:41:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 03:41:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:41:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:41:19,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:41:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:41:19,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074330341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:41:19,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:41:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 03:41:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836549900] [2023-08-30 03:41:19,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:41:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 03:41:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:41:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 03:41:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 03:41:20,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-30 03:41:20,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 638 transitions, 3059 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:41:20,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:41:20,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-30 03:41:20,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:42:17,550 INFO L130 PetriNetUnfolder]: 13472/42873 cut-off events. [2023-08-30 03:42:17,550 INFO L131 PetriNetUnfolder]: For 1667443/1667443 co-relation queries the response was YES. [2023-08-30 03:42:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357645 conditions, 42873 events. 13472/42873 cut-off events. For 1667443/1667443 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 479586 event pairs, 4416 based on Foata normal form. 1/42874 useless extension candidates. Maximal degree in co-relation 357593. Up to 20095 conditions per place. [2023-08-30 03:42:18,280 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 3224 selfloop transitions, 930 changer transitions 1/4155 dead transitions. [2023-08-30 03:42:18,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 4155 transitions, 52968 flow [2023-08-30 03:42:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2023-08-30 03:42:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2023-08-30 03:42:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 31327 transitions. [2023-08-30 03:42:18,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041120312859445 [2023-08-30 03:42:18,319 INFO L72 ComplementDD]: Start complementDD. Operand 378 states and 31327 transitions. [2023-08-30 03:42:18,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 378 states and 31327 transitions. [2023-08-30 03:42:18,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:42:18,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 378 states and 31327 transitions. [2023-08-30 03:42:18,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 379 states, 378 states have (on average 82.87566137566138) internal successors, (31327), 378 states have internal predecessors, (31327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:42:18,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 379 states, 379 states have (on average 184.0) internal successors, (69736), 379 states have internal predecessors, (69736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:42:18,471 INFO L81 ComplementDD]: Finished complementDD. Result has 379 states, 379 states have (on average 184.0) internal successors, (69736), 379 states have internal predecessors, (69736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:42:18,471 INFO L175 Difference]: Start difference. First operand has 387 places, 638 transitions, 3059 flow. Second operand 378 states and 31327 transitions. [2023-08-30 03:42:18,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 4155 transitions, 52968 flow [2023-08-30 03:42:28,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 4155 transitions, 52968 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:42:28,327 INFO L231 Difference]: Finished difference. Result has 838 places, 1539 transitions, 9601 flow [2023-08-30 03:42:28,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=378, PETRI_FLOW=9601, PETRI_PLACES=838, PETRI_TRANSITIONS=1539} [2023-08-30 03:42:28,328 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 816 predicate places. [2023-08-30 03:42:28,329 INFO L495 AbstractCegarLoop]: Abstraction has has 838 places, 1539 transitions, 9601 flow [2023-08-30 03:42:28,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:42:28,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:42:28,330 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:42:28,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 03:42:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 03:42:28,536 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:42:28,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:42:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1499751758, now seen corresponding path program 8 times [2023-08-30 03:42:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:42:28,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169165167] [2023-08-30 03:42:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:42:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:42:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:42:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:42:31,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:42:31,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169165167] [2023-08-30 03:42:31,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169165167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:42:31,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680945224] [2023-08-30 03:42:31,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 03:42:31,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:42:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:42:31,902 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) [2023-08-30 03:42:31,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 03:42:32,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 03:42:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:42:32,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 03:42:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:42:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:42:32,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:42:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:42:33,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680945224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:42:33,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:42:33,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 03:42:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365483337] [2023-08-30 03:42:33,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:42:33,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 03:42:33,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:42:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 03:42:33,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 03:42:34,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-30 03:42:34,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 1539 transitions, 9601 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:42:34,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:42:34,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-30 03:42:34,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:43:53,062 INFO L130 PetriNetUnfolder]: 22509/71378 cut-off events. [2023-08-30 03:43:53,062 INFO L131 PetriNetUnfolder]: For 2834369/2834369 co-relation queries the response was YES. [2023-08-30 03:43:55,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625007 conditions, 71378 events. 22509/71378 cut-off events. For 2834369/2834369 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 871196 event pairs, 7357 based on Foata normal form. 1/71379 useless extension candidates. Maximal degree in co-relation 624880. Up to 39458 conditions per place. [2023-08-30 03:43:55,767 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 3984 selfloop transitions, 1422 changer transitions 1/5407 dead transitions. [2023-08-30 03:43:55,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1224 places, 5407 transitions, 66904 flow [2023-08-30 03:43:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 387 states. [2023-08-30 03:43:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2023-08-30 03:43:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 32090 transitions. [2023-08-30 03:43:55,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45065161217840694 [2023-08-30 03:43:55,797 INFO L72 ComplementDD]: Start complementDD. Operand 387 states and 32090 transitions. [2023-08-30 03:43:55,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 387 states and 32090 transitions. [2023-08-30 03:43:55,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:43:55,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 387 states and 32090 transitions. [2023-08-30 03:43:55,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 388 states, 387 states have (on average 82.91989664082688) internal successors, (32090), 387 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 388 states, 388 states have (on average 184.0) internal successors, (71392), 388 states have internal predecessors, (71392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,916 INFO L81 ComplementDD]: Finished complementDD. Result has 388 states, 388 states have (on average 184.0) internal successors, (71392), 388 states have internal predecessors, (71392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:43:55,916 INFO L175 Difference]: Start difference. First operand has 838 places, 1539 transitions, 9601 flow. Second operand 387 states and 32090 transitions. [2023-08-30 03:43:55,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1224 places, 5407 transitions, 66904 flow [2023-08-30 03:44:32,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1221 places, 5407 transitions, 65243 flow, removed 826 selfloop flow, removed 3 redundant places. [2023-08-30 03:44:32,331 INFO L231 Difference]: Finished difference. Result has 1483 places, 2801 transitions, 22177 flow [2023-08-30 03:44:32,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=835, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=387, PETRI_FLOW=22177, PETRI_PLACES=1483, PETRI_TRANSITIONS=2801} [2023-08-30 03:44:32,333 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1461 predicate places. [2023-08-30 03:44:32,333 INFO L495 AbstractCegarLoop]: Abstraction has has 1483 places, 2801 transitions, 22177 flow [2023-08-30 03:44:32,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:32,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:44:32,334 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:44:32,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 03:44:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 03:44:32,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:44:32,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:44:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash 677243664, now seen corresponding path program 9 times [2023-08-30 03:44:32,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:44:32,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809050732] [2023-08-30 03:44:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:44:32,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:44:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:44:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:35,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:44:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809050732] [2023-08-30 03:44:35,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809050732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:44:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875906395] [2023-08-30 03:44:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 03:44:35,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:44:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:44:35,702 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) [2023-08-30 03:44:35,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 03:44:36,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-08-30 03:44:36,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:44:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 03:44:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:44:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:36,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:44:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:44:37,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875906395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:44:37,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:44:37,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 03:44:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380478097] [2023-08-30 03:44:37,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:44:37,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 03:44:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:44:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 03:44:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 03:44:38,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-30 03:44:38,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1483 places, 2801 transitions, 22177 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:44:38,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:44:38,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-30 03:44:38,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:47:21,906 INFO L130 PetriNetUnfolder]: 33866/106841 cut-off events. [2023-08-30 03:47:21,907 INFO L131 PetriNetUnfolder]: For 4403897/4403897 co-relation queries the response was YES. [2023-08-30 03:47:34,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980909 conditions, 106841 events. 33866/106841 cut-off events. For 4403897/4403897 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 1392903 event pairs, 10899 based on Foata normal form. 1/106842 useless extension candidates. Maximal degree in co-relation 980519. Up to 50574 conditions per place. [2023-08-30 03:47:35,292 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 4151 selfloop transitions, 2595 changer transitions 1/6747 dead transitions. [2023-08-30 03:47:35,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1843 places, 6747 transitions, 84221 flow [2023-08-30 03:47:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2023-08-30 03:47:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2023-08-30 03:47:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 29933 transitions. [2023-08-30 03:47:35,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450635312537637 [2023-08-30 03:47:35,317 INFO L72 ComplementDD]: Start complementDD. Operand 361 states and 29933 transitions. [2023-08-30 03:47:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 29933 transitions. [2023-08-30 03:47:35,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:47:35,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 361 states and 29933 transitions. [2023-08-30 03:47:35,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 362 states, 361 states have (on average 82.91689750692521) internal successors, (29933), 361 states have internal predecessors, (29933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:47:35,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 362 states, 362 states have (on average 184.0) internal successors, (66608), 362 states have internal predecessors, (66608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:47:35,424 INFO L81 ComplementDD]: Finished complementDD. Result has 362 states, 362 states have (on average 184.0) internal successors, (66608), 362 states have internal predecessors, (66608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:47:35,425 INFO L175 Difference]: Start difference. First operand has 1483 places, 2801 transitions, 22177 flow. Second operand 361 states and 29933 transitions. [2023-08-30 03:47:35,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1843 places, 6747 transitions, 84221 flow [2023-08-30 03:48:54,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1836 places, 6747 transitions, 82620 flow, removed 790 selfloop flow, removed 7 redundant places. [2023-08-30 03:48:54,157 INFO L231 Difference]: Finished difference. Result has 2103 places, 4150 transitions, 42369 flow [2023-08-30 03:48:54,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=20576, PETRI_DIFFERENCE_MINUEND_PLACES=1476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=361, PETRI_FLOW=42369, PETRI_PLACES=2103, PETRI_TRANSITIONS=4150} [2023-08-30 03:48:54,161 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 2081 predicate places. [2023-08-30 03:48:54,161 INFO L495 AbstractCegarLoop]: Abstraction has has 2103 places, 4150 transitions, 42369 flow [2023-08-30 03:48:54,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:48:54,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:48:54,162 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:48:54,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 03:48:54,370 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,SelfDestructingSolverStorable15 [2023-08-30 03:48:54,370 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 03:48:54,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:48:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1448542338, now seen corresponding path program 10 times [2023-08-30 03:48:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:48:54,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107071064] [2023-08-30 03:48:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:48:54,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:48:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:48:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:48:57,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:48:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107071064] [2023-08-30 03:48:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107071064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 03:48:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991990418] [2023-08-30 03:48:57,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 03:48:57,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 03:48:57,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:48:57,326 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) [2023-08-30 03:48:57,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 03:48:58,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 03:48:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 03:48:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 03:48:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 03:48:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:48:59,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 03:48:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 03:48:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991990418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 03:48:59,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 03:48:59,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 03:48:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711089886] [2023-08-30 03:48:59,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 03:48:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 03:48:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:48:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 03:48:59,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 03:49:00,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2023-08-30 03:49:00,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2103 places, 4150 transitions, 42369 flow. Second operand has 63 states, 63 states have (on average 79.34920634920636) internal successors, (4999), 63 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:49:00,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:49:00,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2023-08-30 03:49:00,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand