./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.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-ext/01b_inc.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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --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 02:25:29,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:25:29,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:25:29,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:25:29,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:25:29,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:25:29,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:25:29,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:25:29,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:25:29,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:25:29,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:25:29,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:25:29,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:25:29,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:25:29,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:25:29,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:25:29,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:25:29,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:25:29,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:25:29,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:25:29,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:25:29,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:25:29,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:25:29,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:25:29,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:25:29,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:25:29,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:25:29,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:25:29,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:25:29,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:25:29,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:25:29,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:25:29,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:25:29,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:25:29,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:25:29,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:25:29,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:25:29,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:25:29,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:25:29,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:25:29,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:25:29,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:25:29,924 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:25:29,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:25:29,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:25:29,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:25:29,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:25:29,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:25:29,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:25:29,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:25:29,927 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:25:29,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:25:29,928 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:25:29,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:25:29,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:25:29,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:25:29,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:25:29,928 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:25:29,929 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:25:29,929 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:25:29,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:25:29,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:25:29,929 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:25:29,929 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:25:29,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:25:29,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:25:29,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:25:29,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:25:29,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:25:29,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:25:29,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:25:29,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:25:29,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:25:29,931 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:25:29,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:25:29,931 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:25:29,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:25:30,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:25:30,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:25:30,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:25:30,186 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:25:30,186 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:25:30,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-30 02:25:31,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:25:31,309 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:25:31,309 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-30 02:25:31,331 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6973b7411/975d4b759fb146f4b0b071e9dbd4a255/FLAG3689aa6f5 [2023-08-30 02:25:31,342 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6973b7411/975d4b759fb146f4b0b071e9dbd4a255 [2023-08-30 02:25:31,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:25:31,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:25:31,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:25:31,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:25:31,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:25:31,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a60955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31, skipping insertion in model container [2023-08-30 02:25:31,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:25:31,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:25:31,478 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 02:25:31,578 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-ext/01b_inc.i[31005,31018] [2023-08-30 02:25:31,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:25:31,592 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:25:31,609 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 02:25:31,624 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-ext/01b_inc.i[31005,31018] [2023-08-30 02:25:31,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:25:31,659 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:25:31,659 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:25:31,659 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 02:25:31,664 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:25:31,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31 WrapperNode [2023-08-30 02:25:31,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:25:31,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:25:31,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:25:31,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:25:31,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,710 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2023-08-30 02:25:31,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:25:31,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:25:31,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:25:31,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:25:31,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:25:31,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:25:31,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:25:31,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:25:31,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (1/1) ... [2023-08-30 02:25:31,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:25:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:25:31,779 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 02:25:31,810 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 02:25:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:25:31,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:25:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:25:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 02:25:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:25:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:25:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:25:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:25:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 02:25:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:25:31,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:25:31,823 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 02:25:31,944 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:25:31,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:25:32,080 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:25:32,134 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:25:32,134 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 02:25:32,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:25:32 BoogieIcfgContainer [2023-08-30 02:25:32,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:25:32,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:25:32,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:25:32,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:25:32,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:25:31" (1/3) ... [2023-08-30 02:25:32,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91837cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:25:32, skipping insertion in model container [2023-08-30 02:25:32,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:25:31" (2/3) ... [2023-08-30 02:25:32,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91837cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:25:32, skipping insertion in model container [2023-08-30 02:25:32,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:25:32" (3/3) ... [2023-08-30 02:25:32,143 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-08-30 02:25:32,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:25:32,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-30 02:25:32,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:25:32,221 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:32,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 97 flow [2023-08-30 02:25:32,283 INFO L130 PetriNetUnfolder]: 3/61 cut-off events. [2023-08-30 02:25:32,283 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-08-30 02:25:32,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 97 flow [2023-08-30 02:25:32,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 97 flow [2023-08-30 02:25:32,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:32,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 46 transitions, 97 flow [2023-08-30 02:25:32,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 46 transitions, 97 flow [2023-08-30 02:25:32,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 97 flow [2023-08-30 02:25:32,329 INFO L130 PetriNetUnfolder]: 3/61 cut-off events. [2023-08-30 02:25:32,331 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:32,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 3/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-08-30 02:25:32,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-08-30 02:25:33,806 INFO L134 LiptonReduction]: Checked pairs total: 456 [2023-08-30 02:25:33,806 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-30 02:25:33,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:25:33,819 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;@2562e0c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:25:33,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 02:25:33,820 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:25:33,820 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:33,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:33,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:33,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:25:33,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash 8372, now seen corresponding path program 1 times [2023-08-30 02:25:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:33,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659548527] [2023-08-30 02:25:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:33,927 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 02:25:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659548527] [2023-08-30 02:25:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659548527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:33,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:33,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137526190] [2023-08-30 02:25:33,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:33,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:25:33,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:25:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:25:33,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 02:25:33,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 02:25:33,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:33,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 02:25:33,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:33,970 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-30 02:25:33,970 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:33,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 34 event pairs, 4 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 26. Up to 19 conditions per place. [2023-08-30 02:25:33,971 INFO L137 encePairwiseOnDemand]: 88/91 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-08-30 02:25:33,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 35 flow [2023-08-30 02:25:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:25:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:25:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 86 transitions. [2023-08-30 02:25:33,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2023-08-30 02:25:33,978 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 86 transitions. [2023-08-30 02:25:33,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 86 transitions. [2023-08-30 02:25:33,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:33,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 86 transitions. [2023-08-30 02:25:33,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 02:25:33,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:33,984 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:33,985 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 2 states and 86 transitions. [2023-08-30 02:25:33,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 35 flow [2023-08-30 02:25:33,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:33,987 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 21 flow [2023-08-30 02:25:33,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-08-30 02:25:33,990 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-30 02:25:33,990 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 21 flow [2023-08-30 02:25:33,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 02:25:33,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:33,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:33,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:25:33,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:25:33,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 8379, now seen corresponding path program 1 times [2023-08-30 02:25:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374432879] [2023-08-30 02:25:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:34,062 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 02:25:34,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:34,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374432879] [2023-08-30 02:25:34,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374432879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:34,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:34,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:34,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616223553] [2023-08-30 02:25:34,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:34,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:34,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:34,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:34,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:34,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 91 [2023-08-30 02:25:34,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 02:25:34,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:34,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 91 [2023-08-30 02:25:34,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:34,092 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-30 02:25:34,092 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:34,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 32. Up to 14 conditions per place. [2023-08-30 02:25:34,092 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-30 02:25:34,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 7 transitions, 31 flow [2023-08-30 02:25:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-08-30 02:25:34,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992673992673993 [2023-08-30 02:25:34,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-08-30 02:25:34,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-08-30 02:25:34,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:34,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-08-30 02:25:34,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 02:25:34,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 02:25:34,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 02:25:34,095 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 21 flow. Second operand 3 states and 109 transitions. [2023-08-30 02:25:34,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 7 transitions, 31 flow [2023-08-30 02:25:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:34,096 INFO L231 Difference]: Finished difference. Result has 13 places, 7 transitions, 21 flow [2023-08-30 02:25:34,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2023-08-30 02:25:34,096 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2023-08-30 02:25:34,096 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 21 flow [2023-08-30 02:25:34,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 02:25:34,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:34,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:34,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:25:34,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:25:34,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash 8378, now seen corresponding path program 1 times [2023-08-30 02:25:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:34,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131508514] [2023-08-30 02:25:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:34,137 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 02:25:34,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:34,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131508514] [2023-08-30 02:25:34,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131508514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:34,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:34,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570009962] [2023-08-30 02:25:34,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:34,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:34,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:34,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:34,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:34,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 91 [2023-08-30 02:25:34,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 02:25:34,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:34,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 91 [2023-08-30 02:25:34,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:34,162 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 02:25:34,163 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:34,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 25. Up to 10 conditions per place. [2023-08-30 02:25:34,163 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-30 02:25:34,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 6 transitions, 29 flow [2023-08-30 02:25:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-08-30 02:25:34,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2023-08-30 02:25:34,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-08-30 02:25:34,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-08-30 02:25:34,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:34,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-08-30 02:25:34,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 02:25:34,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 02:25:34,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 02:25:34,167 INFO L175 Difference]: Start difference. First operand has 13 places, 7 transitions, 21 flow. Second operand 3 states and 102 transitions. [2023-08-30 02:25:34,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 6 transitions, 29 flow [2023-08-30 02:25:34,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:34,167 INFO L231 Difference]: Finished difference. Result has 13 places, 6 transitions, 20 flow [2023-08-30 02:25:34,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2023-08-30 02:25:34,168 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2023-08-30 02:25:34,168 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 20 flow [2023-08-30 02:25:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 02:25:34,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:34,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 02:25:34,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:25:34,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-30 02:25:34,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash -847831811, now seen corresponding path program 1 times [2023-08-30 02:25:34,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:34,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918370228] [2023-08-30 02:25:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:34,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:25:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:34,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:25:34,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:25:34,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 02:25:34,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-08-30 02:25:34,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-30 02:25:34,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-30 02:25:34,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-08-30 02:25:34,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-08-30 02:25:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:25:34,219 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 02:25:34,220 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:25:34,220 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:25:34,229 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:34,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2023-08-30 02:25:34,240 INFO L130 PetriNetUnfolder]: 5/93 cut-off events. [2023-08-30 02:25:34,240 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:25:34,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-08-30 02:25:34,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 134 flow [2023-08-30 02:25:34,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 134 flow [2023-08-30 02:25:34,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:34,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 134 flow [2023-08-30 02:25:34,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 134 flow [2023-08-30 02:25:34,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2023-08-30 02:25:34,256 INFO L130 PetriNetUnfolder]: 5/93 cut-off events. [2023-08-30 02:25:34,257 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:25:34,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-08-30 02:25:34,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 1428 [2023-08-30 02:25:35,172 INFO L134 LiptonReduction]: Checked pairs total: 4514 [2023-08-30 02:25:35,172 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-30 02:25:35,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:25:35,176 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;@2562e0c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:25:35,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 02:25:35,177 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:25:35,177 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:35,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:35,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:35,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:25:35,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 12057, now seen corresponding path program 1 times [2023-08-30 02:25:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:35,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906219319] [2023-08-30 02:25:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:35,193 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 02:25:35,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:35,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906219319] [2023-08-30 02:25:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906219319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:35,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930636748] [2023-08-30 02:25:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:35,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:25:35,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:25:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:25:35,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 100 [2023-08-30 02:25:35,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 02:25:35,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:35,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 100 [2023-08-30 02:25:35,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:35,252 INFO L130 PetriNetUnfolder]: 196/414 cut-off events. [2023-08-30 02:25:35,253 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 02:25:35,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 414 events. 196/414 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2281 event pairs, 152 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 238. Up to 321 conditions per place. [2023-08-30 02:25:35,255 INFO L137 encePairwiseOnDemand]: 98/100 looper letters, 16 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-30 02:25:35,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 98 flow [2023-08-30 02:25:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:25:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:25:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 112 transitions. [2023-08-30 02:25:35,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-08-30 02:25:35,257 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 112 transitions. [2023-08-30 02:25:35,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 112 transitions. [2023-08-30 02:25:35,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:35,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 112 transitions. [2023-08-30 02:25:35,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 56.0) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 02:25:35,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 02:25:35,259 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 02:25:35,259 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 2 states and 112 transitions. [2023-08-30 02:25:35,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 98 flow [2023-08-30 02:25:35,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 96 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:35,260 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 64 flow [2023-08-30 02:25:35,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-30 02:25:35,261 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-30 02:25:35,261 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 64 flow [2023-08-30 02:25:35,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 48.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 02:25:35,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:35,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:35,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:25:35,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:25:35,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:35,262 INFO L85 PathProgramCache]: Analyzing trace with hash 12063, now seen corresponding path program 1 times [2023-08-30 02:25:35,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:35,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95643239] [2023-08-30 02:25:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:35,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:35,305 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 02:25:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95643239] [2023-08-30 02:25:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95643239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:35,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:35,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308730607] [2023-08-30 02:25:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:35,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:35,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:35,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 100 [2023-08-30 02:25:35,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 02:25:35,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:35,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 100 [2023-08-30 02:25:35,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:35,366 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-08-30 02:25:35,366 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:25:35,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 308 events. 141/308 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1574 event pairs, 108 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 563. Up to 234 conditions per place. [2023-08-30 02:25:35,368 INFO L137 encePairwiseOnDemand]: 98/100 looper letters, 14 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-30 02:25:35,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 92 flow [2023-08-30 02:25:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2023-08-30 02:25:35,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-30 02:25:35,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 145 transitions. [2023-08-30 02:25:35,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 145 transitions. [2023-08-30 02:25:35,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:35,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 145 transitions. [2023-08-30 02:25:35,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 02:25:35,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 02:25:35,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 02:25:35,371 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 64 flow. Second operand 3 states and 145 transitions. [2023-08-30 02:25:35,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 92 flow [2023-08-30 02:25:35,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:35,372 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 64 flow [2023-08-30 02:25:35,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=64, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 02:25:35,372 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 02:25:35,372 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 64 flow [2023-08-30 02:25:35,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 02:25:35,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:35,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:35,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:25:35,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:25:35,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash 12062, now seen corresponding path program 1 times [2023-08-30 02:25:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:35,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983033450] [2023-08-30 02:25:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:35,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:35,399 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 02:25:35,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:35,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983033450] [2023-08-30 02:25:35,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983033450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:35,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:35,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:35,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186267957] [2023-08-30 02:25:35,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:35,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:35,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:35,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 100 [2023-08-30 02:25:35,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 02:25:35,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:35,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 100 [2023-08-30 02:25:35,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:35,441 INFO L130 PetriNetUnfolder]: 86/202 cut-off events. [2023-08-30 02:25:35,441 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:25:35,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 202 events. 86/202 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 908 event pairs, 64 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 372. Up to 148 conditions per place. [2023-08-30 02:25:35,443 INFO L137 encePairwiseOnDemand]: 98/100 looper letters, 13 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 02:25:35,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 90 flow [2023-08-30 02:25:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2023-08-30 02:25:35,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-08-30 02:25:35,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2023-08-30 02:25:35,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2023-08-30 02:25:35,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:35,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2023-08-30 02:25:35,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:25:35,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 02:25:35,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 02:25:35,446 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 64 flow. Second operand 3 states and 138 transitions. [2023-08-30 02:25:35,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 90 flow [2023-08-30 02:25:35,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 89 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:35,446 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 63 flow [2023-08-30 02:25:35,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-30 02:25:35,447 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 02:25:35,447 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 63 flow [2023-08-30 02:25:35,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 02:25:35,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:35,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:25:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:25:35,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:25:35,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -865808231, now seen corresponding path program 1 times [2023-08-30 02:25:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:35,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609994795] [2023-08-30 02:25:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:35,544 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 02:25:35,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:35,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609994795] [2023-08-30 02:25:35,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609994795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:35,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:35,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:25:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392229906] [2023-08-30 02:25:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:35,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:25:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:25:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:25:35,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 100 [2023-08-30 02:25:35,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 02:25:35,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:35,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 100 [2023-08-30 02:25:35,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:35,666 INFO L130 PetriNetUnfolder]: 200/387 cut-off events. [2023-08-30 02:25:35,667 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:25:35,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 387 events. 200/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1943 event pairs, 51 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 782. Up to 128 conditions per place. [2023-08-30 02:25:35,668 INFO L137 encePairwiseOnDemand]: 92/100 looper letters, 35 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2023-08-30 02:25:35,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 211 flow [2023-08-30 02:25:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:25:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:25:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 288 transitions. [2023-08-30 02:25:35,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-08-30 02:25:35,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 288 transitions. [2023-08-30 02:25:35,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 288 transitions. [2023-08-30 02:25:35,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:35,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 288 transitions. [2023-08-30 02:25:35,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 02:25:35,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 02:25:35,673 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 02:25:35,673 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 63 flow. Second operand 6 states and 288 transitions. [2023-08-30 02:25:35,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 211 flow [2023-08-30 02:25:35,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:35,674 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 118 flow [2023-08-30 02:25:35,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-30 02:25:35,675 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-30 02:25:35,675 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 118 flow [2023-08-30 02:25:35,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 02:25:35,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:35,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 02:25:35,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:25:35,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 02:25:35,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -820594224, now seen corresponding path program 1 times [2023-08-30 02:25:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:35,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202416970] [2023-08-30 02:25:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:35,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:35,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:25:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:35,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:25:35,690 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:25:35,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 02:25:35,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-08-30 02:25:35,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 02:25:35,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 02:25:35,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-30 02:25:35,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 02:25:35,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 02:25:35,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:25:35,691 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 02:25:35,692 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:25:35,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:25:35,702 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:35,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 173 flow [2023-08-30 02:25:35,710 INFO L130 PetriNetUnfolder]: 7/125 cut-off events. [2023-08-30 02:25:35,710 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:25:35,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 125 events. 7/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-08-30 02:25:35,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 76 transitions, 173 flow [2023-08-30 02:25:35,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 173 flow [2023-08-30 02:25:35,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:35,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 76 transitions, 173 flow [2023-08-30 02:25:35,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 76 transitions, 173 flow [2023-08-30 02:25:35,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 173 flow [2023-08-30 02:25:35,724 INFO L130 PetriNetUnfolder]: 7/125 cut-off events. [2023-08-30 02:25:35,724 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:25:35,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 125 events. 7/125 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2023-08-30 02:25:35,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 2772 [2023-08-30 02:25:36,697 INFO L134 LiptonReduction]: Checked pairs total: 10276 [2023-08-30 02:25:36,697 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-30 02:25:36,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:25:36,699 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;@2562e0c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:25:36,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 02:25:36,699 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:25:36,699 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:36,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:36,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:36,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:36,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash 16409, now seen corresponding path program 1 times [2023-08-30 02:25:36,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:36,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077803515] [2023-08-30 02:25:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:36,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:36,706 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 02:25:36,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:36,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077803515] [2023-08-30 02:25:36,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077803515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:36,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:36,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:36,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378796259] [2023-08-30 02:25:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:36,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:25:36,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:36,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:25:36,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:25:36,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 121 [2023-08-30 02:25:36,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 99 flow. Second operand has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 02:25:36,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:36,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 121 [2023-08-30 02:25:36,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:36,899 INFO L130 PetriNetUnfolder]: 1596/2690 cut-off events. [2023-08-30 02:25:36,900 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-08-30 02:25:36,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5092 conditions, 2690 events. 1596/2690 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17466 event pairs, 1252 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 769. Up to 2221 conditions per place. [2023-08-30 02:25:36,914 INFO L137 encePairwiseOnDemand]: 119/121 looper letters, 22 selfloop transitions, 0 changer transitions 0/37 dead transitions. [2023-08-30 02:25:36,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 139 flow [2023-08-30 02:25:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:25:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:25:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2023-08-30 02:25:36,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619834710743802 [2023-08-30 02:25:36,915 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 136 transitions. [2023-08-30 02:25:36,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 136 transitions. [2023-08-30 02:25:36,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:36,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 136 transitions. [2023-08-30 02:25:36,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 02:25:36,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 02:25:36,917 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 02:25:36,918 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 99 flow. Second operand 2 states and 136 transitions. [2023-08-30 02:25:36,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 139 flow [2023-08-30 02:25:36,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 133 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:36,921 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 89 flow [2023-08-30 02:25:36,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=89, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-30 02:25:36,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-30 02:25:36,925 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 89 flow [2023-08-30 02:25:36,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 02:25:36,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:36,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:25:36,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:36,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 16414, now seen corresponding path program 1 times [2023-08-30 02:25:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463170029] [2023-08-30 02:25:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:36,964 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 02:25:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463170029] [2023-08-30 02:25:36,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463170029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:36,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:36,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:36,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881279530] [2023-08-30 02:25:36,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:36,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:36,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:36,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:36,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 121 [2023-08-30 02:25:36,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 02:25:36,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:36,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 121 [2023-08-30 02:25:36,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:37,098 INFO L130 PetriNetUnfolder]: 1166/2004 cut-off events. [2023-08-30 02:25:37,098 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 02:25:37,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3756 conditions, 2004 events. 1166/2004 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12555 event pairs, 908 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 3750. Up to 1634 conditions per place. [2023-08-30 02:25:37,107 INFO L137 encePairwiseOnDemand]: 119/121 looper letters, 20 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-30 02:25:37,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 129 flow [2023-08-30 02:25:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-30 02:25:37,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903581267217631 [2023-08-30 02:25:37,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-30 02:25:37,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-30 02:25:37,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:37,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-30 02:25:37,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 02:25:37,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 02:25:37,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 02:25:37,110 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 89 flow. Second operand 3 states and 178 transitions. [2023-08-30 02:25:37,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 129 flow [2023-08-30 02:25:37,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:37,113 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 89 flow [2023-08-30 02:25:37,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-30 02:25:37,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-30 02:25:37,114 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 89 flow [2023-08-30 02:25:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 02:25:37,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:37,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:37,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:25:37,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:37,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:37,117 INFO L85 PathProgramCache]: Analyzing trace with hash 16413, now seen corresponding path program 1 times [2023-08-30 02:25:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:37,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542535472] [2023-08-30 02:25:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:37,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:37,151 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 02:25:37,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:37,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542535472] [2023-08-30 02:25:37,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542535472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:37,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:37,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:37,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221294570] [2023-08-30 02:25:37,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:37,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:37,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:37,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:37,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 121 [2023-08-30 02:25:37,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:37,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:37,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 121 [2023-08-30 02:25:37,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:37,248 INFO L130 PetriNetUnfolder]: 736/1318 cut-off events. [2023-08-30 02:25:37,249 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 02:25:37,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1318 events. 736/1318 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7766 event pairs, 564 based on Foata normal form. 0/1042 useless extension candidates. Maximal degree in co-relation 2479. Up to 1048 conditions per place. [2023-08-30 02:25:37,255 INFO L137 encePairwiseOnDemand]: 119/121 looper letters, 19 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 02:25:37,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 127 flow [2023-08-30 02:25:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-08-30 02:25:37,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2023-08-30 02:25:37,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-08-30 02:25:37,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-08-30 02:25:37,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:37,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-08-30 02:25:37,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 02:25:37,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 02:25:37,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 02:25:37,258 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 89 flow. Second operand 3 states and 171 transitions. [2023-08-30 02:25:37,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 127 flow [2023-08-30 02:25:37,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:37,259 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 88 flow [2023-08-30 02:25:37,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-30 02:25:37,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-30 02:25:37,261 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 88 flow [2023-08-30 02:25:37,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:37,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:37,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:25:37,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:25:37,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:37,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -254488763, now seen corresponding path program 1 times [2023-08-30 02:25:37,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:37,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415675086] [2023-08-30 02:25:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:25:37,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:37,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415675086] [2023-08-30 02:25:37,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415675086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:37,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:37,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:25:37,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388476539] [2023-08-30 02:25:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:25:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:25:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:25:37,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 121 [2023-08-30 02:25:37,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 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 02:25:37,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:37,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 121 [2023-08-30 02:25:37,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:37,734 INFO L130 PetriNetUnfolder]: 3340/4906 cut-off events. [2023-08-30 02:25:37,734 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2023-08-30 02:25:37,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10044 conditions, 4906 events. 3340/4906 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28423 event pairs, 1049 based on Foata normal form. 44/4289 useless extension candidates. Maximal degree in co-relation 10037. Up to 2052 conditions per place. [2023-08-30 02:25:37,753 INFO L137 encePairwiseOnDemand]: 111/121 looper letters, 70 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-30 02:25:37,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 90 transitions, 392 flow [2023-08-30 02:25:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:25:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:25:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 370 transitions. [2023-08-30 02:25:37,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509641873278237 [2023-08-30 02:25:37,755 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 370 transitions. [2023-08-30 02:25:37,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 370 transitions. [2023-08-30 02:25:37,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:37,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 370 transitions. [2023-08-30 02:25:37,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 02:25:37,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states 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 02:25:37,757 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states 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 02:25:37,757 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 88 flow. Second operand 6 states and 370 transitions. [2023-08-30 02:25:37,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 90 transitions, 392 flow [2023-08-30 02:25:37,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 90 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:37,759 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 178 flow [2023-08-30 02:25:37,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-30 02:25:37,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-08-30 02:25:37,759 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 178 flow [2023-08-30 02:25:37,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 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 02:25:37,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:37,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:25:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:25:37,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:37,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2073096126, now seen corresponding path program 1 times [2023-08-30 02:25:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:37,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038757811] [2023-08-30 02:25:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:37,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:25:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:37,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038757811] [2023-08-30 02:25:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038757811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:37,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:25:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708689943] [2023-08-30 02:25:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:25:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:25:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:25:37,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 121 [2023-08-30 02:25:37,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 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 02:25:37,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:37,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 121 [2023-08-30 02:25:37,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:38,479 INFO L130 PetriNetUnfolder]: 5434/8184 cut-off events. [2023-08-30 02:25:38,479 INFO L131 PetriNetUnfolder]: For 3196/3248 co-relation queries the response was YES. [2023-08-30 02:25:38,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19126 conditions, 8184 events. 5434/8184 cut-off events. For 3196/3248 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 54664 event pairs, 1847 based on Foata normal form. 50/7370 useless extension candidates. Maximal degree in co-relation 19115. Up to 3679 conditions per place. [2023-08-30 02:25:38,522 INFO L137 encePairwiseOnDemand]: 114/121 looper letters, 75 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2023-08-30 02:25:38,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 103 transitions, 568 flow [2023-08-30 02:25:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:25:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:25:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2023-08-30 02:25:38,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013774104683195 [2023-08-30 02:25:38,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 364 transitions. [2023-08-30 02:25:38,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 364 transitions. [2023-08-30 02:25:38,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:38,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 364 transitions. [2023-08-30 02:25:38,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.666666666666664) internal successors, (364), 6 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 02:25:38,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states 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 02:25:38,528 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states 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 02:25:38,528 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 178 flow. Second operand 6 states and 364 transitions. [2023-08-30 02:25:38,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 103 transitions, 568 flow [2023-08-30 02:25:38,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:38,534 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 308 flow [2023-08-30 02:25:38,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-08-30 02:25:38,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-08-30 02:25:38,535 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 308 flow [2023-08-30 02:25:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 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 02:25:38,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:38,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 02:25:38,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:25:38,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 02:25:38,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:38,537 INFO L85 PathProgramCache]: Analyzing trace with hash -743523345, now seen corresponding path program 1 times [2023-08-30 02:25:38,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:38,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90755935] [2023-08-30 02:25:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:38,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:38,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:25:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:25:38,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:25:38,559 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-30 02:25:38,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-08-30 02:25:38,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:25:38,560 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:25:38,561 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:25:38,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 02:25:38,588 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:25:38,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 214 flow [2023-08-30 02:25:38,600 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2023-08-30 02:25:38,600 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:25:38,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 157 events. 9/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 407 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 133. Up to 10 conditions per place. [2023-08-30 02:25:38,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 91 transitions, 214 flow [2023-08-30 02:25:38,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 91 transitions, 214 flow [2023-08-30 02:25:38,602 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:25:38,602 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 91 transitions, 214 flow [2023-08-30 02:25:38,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 91 transitions, 214 flow [2023-08-30 02:25:38,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 214 flow [2023-08-30 02:25:38,613 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2023-08-30 02:25:38,613 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 02:25:38,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 157 events. 9/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 407 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 133. Up to 10 conditions per place. [2023-08-30 02:25:38,616 INFO L119 LiptonReduction]: Number of co-enabled transitions 4536 [2023-08-30 02:25:39,938 INFO L134 LiptonReduction]: Checked pairs total: 16958 [2023-08-30 02:25:39,938 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-30 02:25:39,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:25:39,939 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;@2562e0c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:25:39,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 02:25:39,940 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:25:39,940 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:25:39,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:39,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:39,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:25:39,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash 21433, now seen corresponding path program 1 times [2023-08-30 02:25:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180819811] [2023-08-30 02:25:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:39,948 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 02:25:39,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:39,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180819811] [2023-08-30 02:25:39,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180819811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:39,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257629096] [2023-08-30 02:25:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:25:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:25:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:25:39,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 142 [2023-08-30 02:25:39,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 02:25:39,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:39,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 142 [2023-08-30 02:25:39,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:41,022 INFO L130 PetriNetUnfolder]: 11096/16570 cut-off events. [2023-08-30 02:25:41,023 INFO L131 PetriNetUnfolder]: For 1921/1921 co-relation queries the response was YES. [2023-08-30 02:25:41,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31938 conditions, 16570 events. 11096/16570 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 117788 event pairs, 8752 based on Foata normal form. 0/11828 useless extension candidates. Maximal degree in co-relation 5138. Up to 14221 conditions per place. [2023-08-30 02:25:41,103 INFO L137 encePairwiseOnDemand]: 140/142 looper letters, 28 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2023-08-30 02:25:41,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 182 flow [2023-08-30 02:25:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:25:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:25:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2023-08-30 02:25:41,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2023-08-30 02:25:41,104 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2023-08-30 02:25:41,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2023-08-30 02:25:41,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:41,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2023-08-30 02:25:41,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 02:25:41,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 02:25:41,106 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 02:25:41,106 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 130 flow. Second operand 2 states and 160 transitions. [2023-08-30 02:25:41,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 182 flow [2023-08-30 02:25:41,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 170 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:41,108 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 114 flow [2023-08-30 02:25:41,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-30 02:25:41,109 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-08-30 02:25:41,109 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 114 flow [2023-08-30 02:25:41,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 02:25:41,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:41,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:41,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:25:41,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:25:41,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash 21438, now seen corresponding path program 1 times [2023-08-30 02:25:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953532561] [2023-08-30 02:25:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:41,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:41,145 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 02:25:41,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:41,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953532561] [2023-08-30 02:25:41,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953532561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:41,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:41,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:41,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085690648] [2023-08-30 02:25:41,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:41,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:41,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:41,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-08-30 02:25:41,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 02:25:41,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:41,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-08-30 02:25:41,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:41,839 INFO L130 PetriNetUnfolder]: 8166/12359 cut-off events. [2023-08-30 02:25:41,839 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-08-30 02:25:41,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23442 conditions, 12359 events. 8166/12359 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 85527 event pairs, 6408 based on Foata normal form. 0/9140 useless extension candidates. Maximal degree in co-relation 23435. Up to 10509 conditions per place. [2023-08-30 02:25:41,902 INFO L137 encePairwiseOnDemand]: 140/142 looper letters, 26 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-30 02:25:41,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 166 flow [2023-08-30 02:25:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-08-30 02:25:41,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4953051643192488 [2023-08-30 02:25:41,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-08-30 02:25:41,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-08-30 02:25:41,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:41,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-08-30 02:25:41,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 02:25:41,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:41,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:41,907 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 114 flow. Second operand 3 states and 211 transitions. [2023-08-30 02:25:41,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 166 flow [2023-08-30 02:25:41,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 166 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:41,909 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 114 flow [2023-08-30 02:25:41,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-30 02:25:41,910 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-30 02:25:41,910 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 114 flow [2023-08-30 02:25:41,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 02:25:41,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:41,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:25:41,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:25:41,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:25:41,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 21437, now seen corresponding path program 1 times [2023-08-30 02:25:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:41,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992768749] [2023-08-30 02:25:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:41,937 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 02:25:41,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992768749] [2023-08-30 02:25:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992768749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:41,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:41,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:25:41,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938196350] [2023-08-30 02:25:41,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:25:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:25:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:25:41,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-08-30 02:25:41,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 02:25:41,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:41,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-08-30 02:25:41,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:42,490 INFO L130 PetriNetUnfolder]: 5236/8148 cut-off events. [2023-08-30 02:25:42,490 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2023-08-30 02:25:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15522 conditions, 8148 events. 5236/8148 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 54752 event pairs, 4064 based on Foata normal form. 0/6452 useless extension candidates. Maximal degree in co-relation 15514. Up to 6798 conditions per place. [2023-08-30 02:25:42,526 INFO L137 encePairwiseOnDemand]: 140/142 looper letters, 25 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-30 02:25:42,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 164 flow [2023-08-30 02:25:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:25:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:25:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-30 02:25:42,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788732394366197 [2023-08-30 02:25:42,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-30 02:25:42,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-30 02:25:42,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:42,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-30 02:25:42,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 02:25:42,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:42,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:42,530 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 114 flow. Second operand 3 states and 204 transitions. [2023-08-30 02:25:42,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 164 flow [2023-08-30 02:25:42,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:42,531 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 113 flow [2023-08-30 02:25:42,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-30 02:25:42,531 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-30 02:25:42,532 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 113 flow [2023-08-30 02:25:42,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 02:25:42,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:42,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:25:42,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:25:42,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:25:42,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1489161132, now seen corresponding path program 1 times [2023-08-30 02:25:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:42,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497818457] [2023-08-30 02:25:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:42,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:42,623 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 02:25:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497818457] [2023-08-30 02:25:42,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497818457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:42,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:25:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85518425] [2023-08-30 02:25:42,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:25:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:25:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:25:42,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-30 02:25:42,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 02:25:42,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:42,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-30 02:25:42,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:45,351 INFO L130 PetriNetUnfolder]: 38126/50056 cut-off events. [2023-08-30 02:25:45,351 INFO L131 PetriNetUnfolder]: For 2284/2284 co-relation queries the response was YES. [2023-08-30 02:25:45,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102342 conditions, 50056 events. 38126/50056 cut-off events. For 2284/2284 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 300872 event pairs, 13503 based on Foata normal form. 132/43544 useless extension candidates. Maximal degree in co-relation 102334. Up to 22160 conditions per place. [2023-08-30 02:25:45,639 INFO L137 encePairwiseOnDemand]: 130/142 looper letters, 97 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2023-08-30 02:25:45,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 541 flow [2023-08-30 02:25:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:25:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:25:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 444 transitions. [2023-08-30 02:25:45,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211267605633803 [2023-08-30 02:25:45,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 444 transitions. [2023-08-30 02:25:45,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 444 transitions. [2023-08-30 02:25:45,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:45,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 444 transitions. [2023-08-30 02:25:45,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:45,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 02:25:45,644 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 02:25:45,644 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 113 flow. Second operand 6 states and 444 transitions. [2023-08-30 02:25:45,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 541 flow [2023-08-30 02:25:45,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 122 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:25:45,647 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 230 flow [2023-08-30 02:25:45,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-30 02:25:45,647 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-08-30 02:25:45,647 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 230 flow [2023-08-30 02:25:45,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 02:25:45,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:45,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:25:45,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:25:45,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:25:45,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash 396387327, now seen corresponding path program 1 times [2023-08-30 02:25:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:45,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094514867] [2023-08-30 02:25:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:25:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094514867] [2023-08-30 02:25:45,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094514867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:45,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:45,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:25:45,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100786889] [2023-08-30 02:25:45,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:45,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:25:45,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:25:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:25:45,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-30 02:25:45,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:45,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:45,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-30 02:25:45,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:25:51,239 INFO L130 PetriNetUnfolder]: 72724/96946 cut-off events. [2023-08-30 02:25:51,239 INFO L131 PetriNetUnfolder]: For 45565/46013 co-relation queries the response was YES. [2023-08-30 02:25:51,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231616 conditions, 96946 events. 72724/96946 cut-off events. For 45565/46013 co-relation queries the response was YES. Maximal size of possible extension queue 5143. Compared 659978 event pairs, 26615 based on Foata normal form. 426/86754 useless extension candidates. Maximal degree in co-relation 231604. Up to 44665 conditions per place. [2023-08-30 02:25:51,892 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 108 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-08-30 02:25:51,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 144 transitions, 803 flow [2023-08-30 02:25:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:25:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:25:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 436 transitions. [2023-08-30 02:25:51,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117370892018779 [2023-08-30 02:25:51,894 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 436 transitions. [2023-08-30 02:25:51,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 436 transitions. [2023-08-30 02:25:51,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:25:51,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 436 transitions. [2023-08-30 02:25:51,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.66666666666667) internal successors, (436), 6 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:51,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 02:25:51,897 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 02:25:51,897 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 230 flow. Second operand 6 states and 436 transitions. [2023-08-30 02:25:51,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 144 transitions, 803 flow [2023-08-30 02:25:51,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 144 transitions, 803 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:25:51,940 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 401 flow [2023-08-30 02:25:51,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-30 02:25:51,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-30 02:25:51,941 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 401 flow [2023-08-30 02:25:51,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:25:51,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:25:51,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:25:51,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:25:51,942 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:25:51,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:25:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -981044510, now seen corresponding path program 1 times [2023-08-30 02:25:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:25:51,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830032350] [2023-08-30 02:25:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:25:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:25:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:25:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 02:25:52,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:25:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830032350] [2023-08-30 02:25:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830032350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:25:52,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:25:52,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:25:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259916993] [2023-08-30 02:25:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:25:52,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:25:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:25:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:25:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:25:52,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-08-30 02:25:52,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 401 flow. Second operand has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 02:25:52,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:25:52,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-08-30 02:25:52,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:26:02,597 INFO L130 PetriNetUnfolder]: 123863/167541 cut-off events. [2023-08-30 02:26:02,597 INFO L131 PetriNetUnfolder]: For 130047/133087 co-relation queries the response was YES. [2023-08-30 02:26:03,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425198 conditions, 167541 events. 123863/167541 cut-off events. For 130047/133087 co-relation queries the response was YES. Maximal size of possible extension queue 9040. Compared 1264131 event pairs, 45067 based on Foata normal form. 2956/157399 useless extension candidates. Maximal degree in co-relation 425183. Up to 80186 conditions per place. [2023-08-30 02:26:03,988 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 121 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2023-08-30 02:26:03,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 170 transitions, 1173 flow [2023-08-30 02:26:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:26:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:26:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 433 transitions. [2023-08-30 02:26:03,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082159624413145 [2023-08-30 02:26:03,990 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 433 transitions. [2023-08-30 02:26:03,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 433 transitions. [2023-08-30 02:26:03,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:26:03,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 433 transitions. [2023-08-30 02:26:03,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 02:26:03,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 02:26:03,993 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 02:26:03,993 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 401 flow. Second operand 6 states and 433 transitions. [2023-08-30 02:26:03,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 170 transitions, 1173 flow [2023-08-30 02:26:04,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 170 transitions, 1173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:26:04,157 INFO L231 Difference]: Finished difference. Result has 76 places, 100 transitions, 703 flow [2023-08-30 02:26:04,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=703, PETRI_PLACES=76, PETRI_TRANSITIONS=100} [2023-08-30 02:26:04,158 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-08-30 02:26:04,158 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 100 transitions, 703 flow [2023-08-30 02:26:04,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 02:26:04,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:26:04,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:26:04,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:26:04,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:26:04,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:26:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1072997456, now seen corresponding path program 1 times [2023-08-30 02:26:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:26:04,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76053419] [2023-08-30 02:26:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:26:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:26:04,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:26:04,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76053419] [2023-08-30 02:26:04,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76053419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:26:04,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982597776] [2023-08-30 02:26:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:26:04,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:26:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:26:04,320 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 02:26:04,325 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 02:26:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:26:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 02:26:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:26:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:26:04,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:26:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:26:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982597776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:26:04,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:26:04,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-30 02:26:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574489436] [2023-08-30 02:26:04,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:26:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:26:04,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:26:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:26:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:26:04,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 142 [2023-08-30 02:26:04,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 100 transitions, 703 flow. Second operand has 15 states, 15 states have (on average 49.266666666666666) internal successors, (739), 15 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 02:26:04,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:26:04,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 142 [2023-08-30 02:26:04,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:27:19,359 INFO L130 PetriNetUnfolder]: 712131/981150 cut-off events. [2023-08-30 02:27:19,360 INFO L131 PetriNetUnfolder]: For 1015788/1026078 co-relation queries the response was YES. [2023-08-30 02:27:23,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626543 conditions, 981150 events. 712131/981150 cut-off events. For 1015788/1026078 co-relation queries the response was YES. Maximal size of possible extension queue 56069. Compared 9100190 event pairs, 59300 based on Foata normal form. 56190/997113 useless extension candidates. Maximal degree in co-relation 2626525. Up to 124419 conditions per place. [2023-08-30 02:27:27,691 INFO L137 encePairwiseOnDemand]: 109/142 looper letters, 1020 selfloop transitions, 983 changer transitions 0/2009 dead transitions. [2023-08-30 02:27:27,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 2009 transitions, 13651 flow [2023-08-30 02:27:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 02:27:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 02:27:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4986 transitions. [2023-08-30 02:27:27,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163628831814416 [2023-08-30 02:27:27,703 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4986 transitions. [2023-08-30 02:27:27,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4986 transitions. [2023-08-30 02:27:27,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:27:27,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4986 transitions. [2023-08-30 02:27:27,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 73.32352941176471) internal successors, (4986), 68 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states 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 02:27:27,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 142.0) internal successors, (9798), 69 states have internal predecessors, (9798), 0 states have call successors, (0), 0 states 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 02:27:27,729 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 142.0) internal successors, (9798), 69 states have internal predecessors, (9798), 0 states have call successors, (0), 0 states 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 02:27:27,729 INFO L175 Difference]: Start difference. First operand has 76 places, 100 transitions, 703 flow. Second operand 68 states and 4986 transitions. [2023-08-30 02:27:27,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 2009 transitions, 13651 flow [2023-08-30 02:28:32,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 2009 transitions, 13651 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:28:32,355 INFO L231 Difference]: Finished difference. Result has 208 places, 1115 transitions, 12024 flow [2023-08-30 02:28:32,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12024, PETRI_PLACES=208, PETRI_TRANSITIONS=1115} [2023-08-30 02:28:32,355 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 154 predicate places. [2023-08-30 02:28:32,355 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 1115 transitions, 12024 flow [2023-08-30 02:28:32,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 49.266666666666666) internal successors, (739), 15 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 02:28:32,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:28:32,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:28:32,361 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 02:28:32,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 02:28:32,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 02:28:32,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:28:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash -631416826, now seen corresponding path program 1 times [2023-08-30 02:28:32,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:28:32,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388617840] [2023-08-30 02:28:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:28:32,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:28:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:28:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:28:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:28:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388617840] [2023-08-30 02:28:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388617840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:28:32,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:28:32,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:28:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473450629] [2023-08-30 02:28:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:28:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:28:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:28:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:28:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:28:32,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 142 [2023-08-30 02:28:32,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 1115 transitions, 12024 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 02:28:32,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:28:32,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 142 [2023-08-30 02:28:32,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand