./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:22:11,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:22:11,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:22:11,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:22:11,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:22:11,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:22:11,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:22:11,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:22:11,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:22:11,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:22:11,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:22:11,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:22:11,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:22:11,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:22:11,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:22:11,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:22:11,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:22:11,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:22:11,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:22:11,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:22:11,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:22:11,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:22:11,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:22:11,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:22:11,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:22:11,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:22:11,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:22:11,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:22:11,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:22:11,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:22:11,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:22:11,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:22:11,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:22:11,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:22:11,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:22:11,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:22:11,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:22:11,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:22:11,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:22:11,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:22:11,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:22:11,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:22:11,932 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:22:11,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:22:11,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:22:11,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:22:11,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:22:11,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:22:11,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:22:11,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:22:11,936 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:22:11,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:22:11,936 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:22:11,937 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:22:11,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:22:11,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:22:11,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:22:11,937 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:22:11,938 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:22:11,938 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:22:11,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:22:11,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:22:11,938 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:22:11,938 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:22:11,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:22:11,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:22:11,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:22:11,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:22:11,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:22:11,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:22:11,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:22:11,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:22:11,940 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:22:11,940 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:22:11,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:22:11,941 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:22:11,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:22:12,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:22:12,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:22:12,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:22:12,243 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:22:12,244 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:22:12,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2023-08-29 22:22:13,284 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:22:13,491 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:22:13,492 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2023-08-29 22:22:13,503 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1f5a2be/04ac3b89a0cb48a9b0a395c1442f2e3e/FLAG898ffa58c [2023-08-29 22:22:13,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f1f5a2be/04ac3b89a0cb48a9b0a395c1442f2e3e [2023-08-29 22:22:13,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:22:13,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:22:13,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:22:13,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:22:13,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:22:13,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f0dd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13, skipping insertion in model container [2023-08-29 22:22:13,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:22:13,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:22:13,737 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c[2237,2250] [2023-08-29 22:22:13,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:22:13,756 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:22:13,793 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c[2237,2250] [2023-08-29 22:22:13,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:22:13,808 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:22:13,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13 WrapperNode [2023-08-29 22:22:13,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:22:13,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:22:13,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:22:13,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:22:13,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,857 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-29 22:22:13,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:22:13,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:22:13,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:22:13,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:22:13,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:22:13,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:22:13,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:22:13,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:22:13,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (1/1) ... [2023-08-29 22:22:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:22:13,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:13,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:22:13,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:22:13,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:22:13,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:22:13,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:22:13,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:22:13,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:22:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 22:22:13,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 22:22:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 22:22:13,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 22:22:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:22:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:22:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:22:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:22:13,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:22:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:22:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:22:13,972 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:22:14,055 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:22:14,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:22:14,401 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:22:14,407 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:22:14,407 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:22:14,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:22:14 BoogieIcfgContainer [2023-08-29 22:22:14,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:22:14,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:22:14,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:22:14,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:22:14,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:22:13" (1/3) ... [2023-08-29 22:22:14,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655b253c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:22:14, skipping insertion in model container [2023-08-29 22:22:14,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:22:13" (2/3) ... [2023-08-29 22:22:14,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655b253c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:22:14, skipping insertion in model container [2023-08-29 22:22:14,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:22:14" (3/3) ... [2023-08-29 22:22:14,428 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2023-08-29 22:22:14,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:22:14,443 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-29 22:22:14,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:22:14,567 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 22:22:14,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 143 transitions, 318 flow [2023-08-29 22:22:14,698 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2023-08-29 22:22:14,699 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:14,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 139 events. 10/139 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-29 22:22:14,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 143 transitions, 318 flow [2023-08-29 22:22:14,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 135 transitions, 294 flow [2023-08-29 22:22:14,717 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:22:14,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 135 transitions, 294 flow [2023-08-29 22:22:14,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 135 transitions, 294 flow [2023-08-29 22:22:14,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 135 transitions, 294 flow [2023-08-29 22:22:14,788 INFO L130 PetriNetUnfolder]: 10/135 cut-off events. [2023-08-29 22:22:14,788 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 22:22:14,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 135 events. 10/135 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-29 22:22:14,792 INFO L119 LiptonReduction]: Number of co-enabled transitions 1608 [2023-08-29 22:22:19,050 INFO L134 LiptonReduction]: Checked pairs total: 2066 [2023-08-29 22:22:19,050 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-29 22:22:19,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:22:19,067 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;@ec05cff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:22:19,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 22:22:19,069 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 22:22:19,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:19,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:19,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 22:22:19,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:19,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 516, now seen corresponding path program 1 times [2023-08-29 22:22:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:19,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836805315] [2023-08-29 22:22:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:19,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:19,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836805315] [2023-08-29 22:22:19,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836805315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:19,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:19,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 22:22:19,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577472470] [2023-08-29 22:22:19,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 22:22:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:19,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 22:22:19,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 22:22:19,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 273 [2023-08-29 22:22:19,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:19,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 273 [2023-08-29 22:22:19,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:19,337 INFO L130 PetriNetUnfolder]: 513/692 cut-off events. [2023-08-29 22:22:19,338 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 22:22:19,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 692 events. 513/692 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1648 event pairs, 249 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 1020. Up to 693 conditions per place. [2023-08-29 22:22:19,343 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 39 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2023-08-29 22:22:19,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 180 flow [2023-08-29 22:22:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 22:22:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 22:22:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 298 transitions. [2023-08-29 22:22:19,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2023-08-29 22:22:19,356 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 298 transitions. [2023-08-29 22:22:19,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 298 transitions. [2023-08-29 22:22:19,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 298 transitions. [2023-08-29 22:22:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,366 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,367 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 2 states and 298 transitions. [2023-08-29 22:22:19,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 180 flow [2023-08-29 22:22:19,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 22:22:19,372 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 86 flow [2023-08-29 22:22:19,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-29 22:22:19,377 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-08-29 22:22:19,377 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 86 flow [2023-08-29 22:22:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:19,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:22:19,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:22:19,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:19,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:19,379 INFO L85 PathProgramCache]: Analyzing trace with hash 505234, now seen corresponding path program 1 times [2023-08-29 22:22:19,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:19,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967029755] [2023-08-29 22:22:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:19,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:19,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967029755] [2023-08-29 22:22:19,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967029755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:19,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111505205] [2023-08-29 22:22:19,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:19,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:19,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-29 22:22:19,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:19,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-29 22:22:19,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:19,916 INFO L130 PetriNetUnfolder]: 487/656 cut-off events. [2023-08-29 22:22:19,916 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:19,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 656 events. 487/656 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1532 event pairs, 236 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 1327. Up to 656 conditions per place. [2023-08-29 22:22:19,921 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-29 22:22:19,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 156 flow [2023-08-29 22:22:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-29 22:22:19,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2023-08-29 22:22:19,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-29 22:22:19,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-29 22:22:19,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:19,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-29 22:22:19,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,933 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 86 flow. Second operand 3 states and 408 transitions. [2023-08-29 22:22:19,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 156 flow [2023-08-29 22:22:19,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:22:19,934 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 84 flow [2023-08-29 22:22:19,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-29 22:22:19,935 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -10 predicate places. [2023-08-29 22:22:19,935 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 84 flow [2023-08-29 22:22:19,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:19,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:19,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:22:19,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:22:19,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:19,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash 505233, now seen corresponding path program 1 times [2023-08-29 22:22:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517942148] [2023-08-29 22:22:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517942148] [2023-08-29 22:22:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517942148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:20,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:20,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951934383] [2023-08-29 22:22:20,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:20,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 273 [2023-08-29 22:22:20,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:20,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 273 [2023-08-29 22:22:20,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:20,227 INFO L130 PetriNetUnfolder]: 461/620 cut-off events. [2023-08-29 22:22:20,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:20,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 620 events. 461/620 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1430 event pairs, 223 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 1256. Up to 620 conditions per place. [2023-08-29 22:22:20,231 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 34 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-29 22:22:20,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 150 flow [2023-08-29 22:22:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-29 22:22:20,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47374847374847373 [2023-08-29 22:22:20,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-29 22:22:20,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-29 22:22:20,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:20,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-29 22:22:20,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,240 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 84 flow. Second operand 3 states and 388 transitions. [2023-08-29 22:22:20,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 150 flow [2023-08-29 22:22:20,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:20,243 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 81 flow [2023-08-29 22:22:20,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=81, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-29 22:22:20,245 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -11 predicate places. [2023-08-29 22:22:20,248 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 81 flow [2023-08-29 22:22:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:20,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:22:20,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 22:22:20,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:20,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash 485539115, now seen corresponding path program 1 times [2023-08-29 22:22:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:20,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32077956] [2023-08-29 22:22:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:20,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32077956] [2023-08-29 22:22:20,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32077956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:20,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:20,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:20,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906047897] [2023-08-29 22:22:20,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:20,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:20,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-29 22:22:20,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:20,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-29 22:22:20,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:20,459 INFO L130 PetriNetUnfolder]: 445/596 cut-off events. [2023-08-29 22:22:20,459 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:20,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 596 events. 445/596 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1370 event pairs, 215 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 1209. Up to 596 conditions per place. [2023-08-29 22:22:20,462 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 32 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-29 22:22:20,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 143 flow [2023-08-29 22:22:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-29 22:22:20,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932844932844933 [2023-08-29 22:22:20,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-29 22:22:20,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-29 22:22:20,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:20,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-29 22:22:20,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,468 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 81 flow. Second operand 3 states and 404 transitions. [2023-08-29 22:22:20,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 143 flow [2023-08-29 22:22:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:20,470 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 78 flow [2023-08-29 22:22:20,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-29 22:22:20,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -12 predicate places. [2023-08-29 22:22:20,471 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 78 flow [2023-08-29 22:22:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:20,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:22:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 22:22:20,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:20,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash 485539113, now seen corresponding path program 1 times [2023-08-29 22:22:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875139823] [2023-08-29 22:22:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:20,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875139823] [2023-08-29 22:22:20,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875139823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:20,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:20,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:20,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551699194] [2023-08-29 22:22:20,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:20,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:20,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:20,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:20,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 273 [2023-08-29 22:22:20,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:20,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 273 [2023-08-29 22:22:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:20,674 INFO L130 PetriNetUnfolder]: 429/572 cut-off events. [2023-08-29 22:22:20,674 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:20,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 572 events. 429/572 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1295 event pairs, 207 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 1162. Up to 572 conditions per place. [2023-08-29 22:22:20,678 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-29 22:22:20,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 136 flow [2023-08-29 22:22:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2023-08-29 22:22:20,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2023-08-29 22:22:20,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2023-08-29 22:22:20,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2023-08-29 22:22:20,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:20,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2023-08-29 22:22:20,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,684 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 78 flow. Second operand 3 states and 384 transitions. [2023-08-29 22:22:20,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 136 flow [2023-08-29 22:22:20,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:20,686 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 75 flow [2023-08-29 22:22:20,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-29 22:22:20,686 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -13 predicate places. [2023-08-29 22:22:20,687 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 75 flow [2023-08-29 22:22:20,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:20,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:20,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 22:22:20,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:20,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1548335376, now seen corresponding path program 1 times [2023-08-29 22:22:20,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:20,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104012388] [2023-08-29 22:22:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:20,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104012388] [2023-08-29 22:22:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104012388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:20,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:20,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244248923] [2023-08-29 22:22:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:20,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-29 22:22:20,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:20,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-29 22:22:20,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:20,845 INFO L130 PetriNetUnfolder]: 403/536 cut-off events. [2023-08-29 22:22:20,846 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:20,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 536 events. 403/536 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1185 event pairs, 194 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1091. Up to 536 conditions per place. [2023-08-29 22:22:20,849 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-29 22:22:20,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 129 flow [2023-08-29 22:22:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-29 22:22:20,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884004884004884 [2023-08-29 22:22:20,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-29 22:22:20,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-29 22:22:20,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:20,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-29 22:22:20,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 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) [2023-08-29 22:22:20,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,854 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 75 flow. Second operand 3 states and 400 transitions. [2023-08-29 22:22:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 129 flow [2023-08-29 22:22:20,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 29 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:20,856 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 72 flow [2023-08-29 22:22:20,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-29 22:22:20,857 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -14 predicate places. [2023-08-29 22:22:20,857 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 72 flow [2023-08-29 22:22:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:20,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:20,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:22:20,858 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:20,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1548335375, now seen corresponding path program 1 times [2023-08-29 22:22:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708233674] [2023-08-29 22:22:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:20,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:20,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708233674] [2023-08-29 22:22:20,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708233674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:20,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:20,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:20,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411340186] [2023-08-29 22:22:20,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:20,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:20,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:20,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 273 [2023-08-29 22:22:20,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:20,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:20,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 273 [2023-08-29 22:22:20,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:21,022 INFO L130 PetriNetUnfolder]: 377/500 cut-off events. [2023-08-29 22:22:21,022 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:21,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 500 events. 377/500 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1076 event pairs, 181 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 1020. Up to 500 conditions per place. [2023-08-29 22:22:21,025 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-29 22:22:21,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 122 flow [2023-08-29 22:22:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-29 22:22:21,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463980463980464 [2023-08-29 22:22:21,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-29 22:22:21,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-29 22:22:21,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:21,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-29 22:22:21,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,030 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 72 flow. Second operand 3 states and 380 transitions. [2023-08-29 22:22:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 122 flow [2023-08-29 22:22:21,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:21,031 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 69 flow [2023-08-29 22:22:21,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-29 22:22:21,032 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-08-29 22:22:21,032 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 69 flow [2023-08-29 22:22:21,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:21,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:22:21,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:21,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1891601682, now seen corresponding path program 1 times [2023-08-29 22:22:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492017058] [2023-08-29 22:22:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:21,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492017058] [2023-08-29 22:22:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492017058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:21,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308296668] [2023-08-29 22:22:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:21,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-29 22:22:21,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:21,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-29 22:22:21,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:21,312 INFO L130 PetriNetUnfolder]: 313/420 cut-off events. [2023-08-29 22:22:21,312 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 420 events. 313/420 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 852 event pairs, 149 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 861. Up to 420 conditions per place. [2023-08-29 22:22:21,314 INFO L137 encePairwiseOnDemand]: 271/273 looper letters, 25 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 22:22:21,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 119 flow [2023-08-29 22:22:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-29 22:22:21,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-08-29 22:22:21,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-29 22:22:21,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-29 22:22:21,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:21,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-29 22:22:21,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,320 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 69 flow. Second operand 3 states and 396 transitions. [2023-08-29 22:22:21,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 119 flow [2023-08-29 22:22:21,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:21,321 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 68 flow [2023-08-29 22:22:21,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-29 22:22:21,322 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-08-29 22:22:21,322 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 68 flow [2023-08-29 22:22:21,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:21,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:21,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:22:21,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:21,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1891601683, now seen corresponding path program 1 times [2023-08-29 22:22:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633498428] [2023-08-29 22:22:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:21,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:21,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633498428] [2023-08-29 22:22:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633498428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:21,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:21,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:22:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231120447] [2023-08-29 22:22:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:21,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 273 [2023-08-29 22:22:21,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 68 flow. Second operand has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:21,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 273 [2023-08-29 22:22:21,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:21,663 INFO L130 PetriNetUnfolder]: 249/340 cut-off events. [2023-08-29 22:22:21,663 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:22:21,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 340 events. 249/340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 644 event pairs, 117 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 702. Up to 340 conditions per place. [2023-08-29 22:22:21,665 INFO L137 encePairwiseOnDemand]: 271/273 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-29 22:22:21,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 116 flow [2023-08-29 22:22:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-29 22:22:21,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163614163614164 [2023-08-29 22:22:21,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-29 22:22:21,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-29 22:22:21,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:21,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-29 22:22:21,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,670 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 68 flow. Second operand 3 states and 341 transitions. [2023-08-29 22:22:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 116 flow [2023-08-29 22:22:21,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:21,672 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 67 flow [2023-08-29 22:22:21,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=67, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-29 22:22:21,674 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2023-08-29 22:22:21,674 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 67 flow [2023-08-29 22:22:21,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:21,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:22:21,675 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:21,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash 235458399, now seen corresponding path program 1 times [2023-08-29 22:22:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552676855] [2023-08-29 22:22:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:21,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:21,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:21,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552676855] [2023-08-29 22:22:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552676855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:21,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:21,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:22:21,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299462757] [2023-08-29 22:22:21,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:21,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:22:21,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:22:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:22:21,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:21,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:21,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:21,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:21,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:22,083 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2023-08-29 22:22:22,084 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-29 22:22:22,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 677 events. 497/677 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1784 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1391. Up to 471 conditions per place. [2023-08-29 22:22:22,087 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2023-08-29 22:22:22,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 212 flow [2023-08-29 22:22:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:22:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:22:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-29 22:22:22,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-08-29 22:22:22,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-29 22:22:22,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-29 22:22:22,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:22,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-29 22:22:22,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,093 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 67 flow. Second operand 3 states and 396 transitions. [2023-08-29 22:22:22,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 212 flow [2023-08-29 22:22:22,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:22,095 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 99 flow [2023-08-29 22:22:22,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-29 22:22:22,096 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -13 predicate places. [2023-08-29 22:22:22,096 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 99 flow [2023-08-29 22:22:22,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:22,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:22,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:22:22,097 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:22,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:22,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1175869988, now seen corresponding path program 1 times [2023-08-29 22:22:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750692570] [2023-08-29 22:22:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:22,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:22,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750692570] [2023-08-29 22:22:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750692570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:22,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:22,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008363619] [2023-08-29 22:22:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:22,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:22,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:22,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:22,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:22,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:22,429 INFO L130 PetriNetUnfolder]: 693/951 cut-off events. [2023-08-29 22:22:22,430 INFO L131 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2023-08-29 22:22:22,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 951 events. 693/951 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2804 event pairs, 67 based on Foata normal form. 32/983 useless extension candidates. Maximal degree in co-relation 2420. Up to 371 conditions per place. [2023-08-29 22:22:22,435 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 68 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2023-08-29 22:22:22,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 78 transitions, 395 flow [2023-08-29 22:22:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 652 transitions. [2023-08-29 22:22:22,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776556776556777 [2023-08-29 22:22:22,438 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 652 transitions. [2023-08-29 22:22:22,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 652 transitions. [2023-08-29 22:22:22,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:22,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 652 transitions. [2023-08-29 22:22:22,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,442 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,442 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 99 flow. Second operand 5 states and 652 transitions. [2023-08-29 22:22:22,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 78 transitions, 395 flow [2023-08-29 22:22:22,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 78 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:22,444 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 159 flow [2023-08-29 22:22:22,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-29 22:22:22,445 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2023-08-29 22:22:22,445 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 159 flow [2023-08-29 22:22:22,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:22,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:22,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:22,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:22:22,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:22,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1244741241, now seen corresponding path program 1 times [2023-08-29 22:22:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:22,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220870465] [2023-08-29 22:22:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:22,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:22,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220870465] [2023-08-29 22:22:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220870465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:22:22,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202022450] [2023-08-29 22:22:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:22,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:22,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:22:22,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:22:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:22:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:22,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202022450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:23,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:22:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:22:23,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90370773] [2023-08-29 22:22:23,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:23,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:23,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:23,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:23,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:23,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:23,533 INFO L130 PetriNetUnfolder]: 1309/1809 cut-off events. [2023-08-29 22:22:23,533 INFO L131 PetriNetUnfolder]: For 1985/1985 co-relation queries the response was YES. [2023-08-29 22:22:23,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 1809 events. 1309/1809 cut-off events. For 1985/1985 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6336 event pairs, 291 based on Foata normal form. 68/1877 useless extension candidates. Maximal degree in co-relation 5610. Up to 757 conditions per place. [2023-08-29 22:22:23,545 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 98 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2023-08-29 22:22:23,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 106 transitions, 649 flow [2023-08-29 22:22:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-29 22:22:23,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484981684981685 [2023-08-29 22:22:23,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-29 22:22:23,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-29 22:22:23,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:23,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-29 22:22:23,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:23,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:23,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:23,552 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 159 flow. Second operand 5 states and 662 transitions. [2023-08-29 22:22:23,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 106 transitions, 649 flow [2023-08-29 22:22:23,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 106 transitions, 649 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:22:23,557 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 214 flow [2023-08-29 22:22:23,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-29 22:22:23,558 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-29 22:22:23,558 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 214 flow [2023-08-29 22:22:23,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:23,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:23,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:23,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:23,769 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,SelfDestructingSolverStorable11 [2023-08-29 22:22:23,770 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:23,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash -898378087, now seen corresponding path program 1 times [2023-08-29 22:22:23,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004013702] [2023-08-29 22:22:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:23,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004013702] [2023-08-29 22:22:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004013702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190101138] [2023-08-29 22:22:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:24,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:24,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:24,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:24,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:24,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:24,246 INFO L130 PetriNetUnfolder]: 1267/1767 cut-off events. [2023-08-29 22:22:24,246 INFO L131 PetriNetUnfolder]: For 3216/3216 co-relation queries the response was YES. [2023-08-29 22:22:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 1767 events. 1267/1767 cut-off events. For 3216/3216 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6486 event pairs, 121 based on Foata normal form. 42/1809 useless extension candidates. Maximal degree in co-relation 6441. Up to 676 conditions per place. [2023-08-29 22:22:24,258 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 96 selfloop transitions, 10 changer transitions 0/106 dead transitions. [2023-08-29 22:22:24,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 106 transitions, 713 flow [2023-08-29 22:22:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 656 transitions. [2023-08-29 22:22:24,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805860805860806 [2023-08-29 22:22:24,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 656 transitions. [2023-08-29 22:22:24,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 656 transitions. [2023-08-29 22:22:24,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:24,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 656 transitions. [2023-08-29 22:22:24,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:24,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:24,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:24,266 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 214 flow. Second operand 5 states and 656 transitions. [2023-08-29 22:22:24,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 106 transitions, 713 flow [2023-08-29 22:22:24,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 106 transitions, 713 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:22:24,278 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 277 flow [2023-08-29 22:22:24,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-29 22:22:24,279 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-29 22:22:24,279 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 277 flow [2023-08-29 22:22:24,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:24,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:24,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:24,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 22:22:24,280 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:24,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1636193355, now seen corresponding path program 1 times [2023-08-29 22:22:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:24,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401519465] [2023-08-29 22:22:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:24,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401519465] [2023-08-29 22:22:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401519465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:22:24,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33369051] [2023-08-29 22:22:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:24,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:24,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:22:24,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:22:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:22:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:24,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:24,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33369051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:24,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:22:24,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:22:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518069498] [2023-08-29 22:22:24,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:24,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:24,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:24,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 121.66666666666667) internal successors, (730), 6 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:24,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:24,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:24,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:24,993 INFO L130 PetriNetUnfolder]: 1677/2363 cut-off events. [2023-08-29 22:22:24,994 INFO L131 PetriNetUnfolder]: For 4871/4871 co-relation queries the response was YES. [2023-08-29 22:22:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9238 conditions, 2363 events. 1677/2363 cut-off events. For 4871/4871 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9118 event pairs, 347 based on Foata normal form. 90/2453 useless extension candidates. Maximal degree in co-relation 9225. Up to 957 conditions per place. [2023-08-29 22:22:25,011 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 104 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2023-08-29 22:22:25,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 114 transitions, 879 flow [2023-08-29 22:22:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-29 22:22:25,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47912087912087914 [2023-08-29 22:22:25,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-29 22:22:25,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-29 22:22:25,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:25,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-29 22:22:25,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,018 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,018 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 277 flow. Second operand 5 states and 654 transitions. [2023-08-29 22:22:25,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 114 transitions, 879 flow [2023-08-29 22:22:25,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 114 transitions, 834 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:25,027 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 318 flow [2023-08-29 22:22:25,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-29 22:22:25,028 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-29 22:22:25,028 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 318 flow [2023-08-29 22:22:25,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.66666666666667) internal successors, (730), 6 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:25,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:25,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:25,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-29 22:22:25,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:25,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:25,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1653076919, now seen corresponding path program 2 times [2023-08-29 22:22:25,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:25,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803169683] [2023-08-29 22:22:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:25,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:25,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803169683] [2023-08-29 22:22:25,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803169683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:25,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:25,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:25,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514669092] [2023-08-29 22:22:25,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:25,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:25,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:25,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:25,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:25,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:25,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:25,615 INFO L130 PetriNetUnfolder]: 1475/2065 cut-off events. [2023-08-29 22:22:25,616 INFO L131 PetriNetUnfolder]: For 4844/4844 co-relation queries the response was YES. [2023-08-29 22:22:25,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8746 conditions, 2065 events. 1475/2065 cut-off events. For 4844/4844 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7808 event pairs, 77 based on Foata normal form. 42/2107 useless extension candidates. Maximal degree in co-relation 8730. Up to 818 conditions per place. [2023-08-29 22:22:25,632 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 100 selfloop transitions, 9 changer transitions 2/111 dead transitions. [2023-08-29 22:22:25,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 849 flow [2023-08-29 22:22:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 651 transitions. [2023-08-29 22:22:25,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2023-08-29 22:22:25,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 651 transitions. [2023-08-29 22:22:25,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 651 transitions. [2023-08-29 22:22:25,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:25,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 651 transitions. [2023-08-29 22:22:25,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,639 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,639 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 318 flow. Second operand 5 states and 651 transitions. [2023-08-29 22:22:25,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 849 flow [2023-08-29 22:22:25,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 840 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:25,670 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 322 flow [2023-08-29 22:22:25,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-08-29 22:22:25,670 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-29 22:22:25,671 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 322 flow [2023-08-29 22:22:25,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:25,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:25,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 22:22:25,672 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:25,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1099899322, now seen corresponding path program 2 times [2023-08-29 22:22:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960683396] [2023-08-29 22:22:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:25,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:25,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:25,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960683396] [2023-08-29 22:22:25,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960683396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:22:25,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772523066] [2023-08-29 22:22:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:22:25,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:25,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:25,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:22:25,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:22:25,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:22:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:22:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:22:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:26,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:26,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772523066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:26,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:22:26,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:22:26,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287043566] [2023-08-29 22:22:26,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:26,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:26,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:26,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:26,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 322 flow. Second operand has 6 states, 6 states have (on average 122.66666666666667) internal successors, (736), 6 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:26,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:26,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:26,462 INFO L130 PetriNetUnfolder]: 1719/2393 cut-off events. [2023-08-29 22:22:26,462 INFO L131 PetriNetUnfolder]: For 5907/5907 co-relation queries the response was YES. [2023-08-29 22:22:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10668 conditions, 2393 events. 1719/2393 cut-off events. For 5907/5907 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8942 event pairs, 311 based on Foata normal form. 84/2477 useless extension candidates. Maximal degree in co-relation 10651. Up to 1357 conditions per place. [2023-08-29 22:22:26,485 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-08-29 22:22:26,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 869 flow [2023-08-29 22:22:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 648 transitions. [2023-08-29 22:22:26,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747252747252747 [2023-08-29 22:22:26,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 648 transitions. [2023-08-29 22:22:26,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 648 transitions. [2023-08-29 22:22:26,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:26,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 648 transitions. [2023-08-29 22:22:26,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:26,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:26,493 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:26,493 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 322 flow. Second operand 5 states and 648 transitions. [2023-08-29 22:22:26,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 869 flow [2023-08-29 22:22:26,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 862 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:26,502 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 369 flow [2023-08-29 22:22:26,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-29 22:22:26,503 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-29 22:22:26,503 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 369 flow [2023-08-29 22:22:26,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.66666666666667) internal successors, (736), 6 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:26,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:26,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:26,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:26,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:26,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:26,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1775166833, now seen corresponding path program 2 times [2023-08-29 22:22:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639838612] [2023-08-29 22:22:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639838612] [2023-08-29 22:22:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639838612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:22:26,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:22:26,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:22:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867626124] [2023-08-29 22:22:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:22:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:22:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:22:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:22:26,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:26,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:26,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:26,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:26,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:27,109 INFO L130 PetriNetUnfolder]: 1441/1985 cut-off events. [2023-08-29 22:22:27,109 INFO L131 PetriNetUnfolder]: For 8603/8603 co-relation queries the response was YES. [2023-08-29 22:22:27,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9491 conditions, 1985 events. 1441/1985 cut-off events. For 8603/8603 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7363 event pairs, 61 based on Foata normal form. 34/2019 useless extension candidates. Maximal degree in co-relation 9471. Up to 818 conditions per place. [2023-08-29 22:22:27,125 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 114 selfloop transitions, 9 changer transitions 4/127 dead transitions. [2023-08-29 22:22:27,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 127 transitions, 1146 flow [2023-08-29 22:22:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 655 transitions. [2023-08-29 22:22:27,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985347985347987 [2023-08-29 22:22:27,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 655 transitions. [2023-08-29 22:22:27,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 655 transitions. [2023-08-29 22:22:27,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:27,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 655 transitions. [2023-08-29 22:22:27,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,132 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,132 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 369 flow. Second operand 5 states and 655 transitions. [2023-08-29 22:22:27,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 127 transitions, 1146 flow [2023-08-29 22:22:27,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 1089 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:27,143 INFO L231 Difference]: Finished difference. Result has 73 places, 50 transitions, 367 flow [2023-08-29 22:22:27,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2023-08-29 22:22:27,144 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-08-29 22:22:27,144 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 367 flow [2023-08-29 22:22:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:27,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 22:22:27,144 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:27,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1772330553, now seen corresponding path program 2 times [2023-08-29 22:22:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690462731] [2023-08-29 22:22:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:27,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690462731] [2023-08-29 22:22:27,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690462731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:22:27,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533750925] [2023-08-29 22:22:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:22:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:27,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:22:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:22:27,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:22:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:22:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 22:22:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:27,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533750925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:27,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:22:27,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-29 22:22:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092876846] [2023-08-29 22:22:27,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:27,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:22:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:22:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:22:27,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:22:27,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 367 flow. Second operand has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:22:27,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:22:27,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:22:27,934 INFO L130 PetriNetUnfolder]: 1657/2269 cut-off events. [2023-08-29 22:22:27,934 INFO L131 PetriNetUnfolder]: For 8079/8079 co-relation queries the response was YES. [2023-08-29 22:22:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10979 conditions, 2269 events. 1657/2269 cut-off events. For 8079/8079 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8115 event pairs, 481 based on Foata normal form. 68/2337 useless extension candidates. Maximal degree in co-relation 10958. Up to 1331 conditions per place. [2023-08-29 22:22:27,952 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 117 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2023-08-29 22:22:27,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 125 transitions, 1114 flow [2023-08-29 22:22:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:22:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:22:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 652 transitions. [2023-08-29 22:22:27,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776556776556777 [2023-08-29 22:22:27,954 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 652 transitions. [2023-08-29 22:22:27,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 652 transitions. [2023-08-29 22:22:27,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:22:27,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 652 transitions. [2023-08-29 22:22:27,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,958 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,958 INFO L175 Difference]: Start difference. First operand has 73 places, 50 transitions, 367 flow. Second operand 5 states and 652 transitions. [2023-08-29 22:22:27,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 125 transitions, 1114 flow [2023-08-29 22:22:27,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 1105 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 22:22:27,968 INFO L231 Difference]: Finished difference. Result has 78 places, 53 transitions, 408 flow [2023-08-29 22:22:27,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=408, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2023-08-29 22:22:27,968 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2023-08-29 22:22:27,968 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 408 flow [2023-08-29 22:22:27,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:22:27,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:22:27,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:22:27,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:22:28,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 22:22:28,175 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:22:28,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:22:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1296094535, now seen corresponding path program 1 times [2023-08-29 22:22:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:22:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506765782] [2023-08-29 22:22:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:22:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:28,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:22:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506765782] [2023-08-29 22:22:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506765782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:22:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870256120] [2023-08-29 22:22:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:22:28,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:22:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:22:28,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:22:28,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:22:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:22:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:22:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:22:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:46,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:22:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:22:53,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870256120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:22:53,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:22:53,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-29 22:22:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778873056] [2023-08-29 22:22:53,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:22:53,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:22:53,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:22:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:22:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=168, Unknown=8, NotChecked=0, Total=240 [2023-08-29 22:22:55,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:22:58,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:00,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:02,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:04,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:06,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:06,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-29 22:23:06,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 408 flow. Second operand has 16 states, 16 states have (on average 107.8125) internal successors, (1725), 16 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:23:06,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:23:06,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-29 22:23:06,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:23:08,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:10,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:19,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:21,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:35,349 WARN L222 SmtUtils]: Spent 11.21s on a formula simplification. DAG size of input: 69 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 22:23:37,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:39,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:42,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:44,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:49,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:51,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:54,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:56,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:23:58,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:00,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:03,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:06,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:08,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:09,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:11,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:14,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:21,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:23,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:25,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:27,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:29,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:31,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:34,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:36,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:38,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:42,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:44,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:46,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:48,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:50,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:52,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:55,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:57,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:24:59,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:00,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:02,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:06,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:08,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:10,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:12,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:15,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:19,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:20,887 INFO L130 PetriNetUnfolder]: 2501/3475 cut-off events. [2023-08-29 22:25:20,887 INFO L131 PetriNetUnfolder]: For 11651/11651 co-relation queries the response was YES. [2023-08-29 22:25:20,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17312 conditions, 3475 events. 2501/3475 cut-off events. For 11651/11651 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14279 event pairs, 205 based on Foata normal form. 40/3515 useless extension candidates. Maximal degree in co-relation 17288. Up to 2227 conditions per place. [2023-08-29 22:25:20,913 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 182 selfloop transitions, 53 changer transitions 21/256 dead transitions. [2023-08-29 22:25:20,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 256 transitions, 2024 flow [2023-08-29 22:25:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 22:25:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 22:25:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1552 transitions. [2023-08-29 22:25:20,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373062834601296 [2023-08-29 22:25:20,947 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1552 transitions. [2023-08-29 22:25:20,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1552 transitions. [2023-08-29 22:25:20,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:25:20,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1552 transitions. [2023-08-29 22:25:20,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 119.38461538461539) internal successors, (1552), 13 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:20,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:20,968 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:20,969 INFO L175 Difference]: Start difference. First operand has 78 places, 53 transitions, 408 flow. Second operand 13 states and 1552 transitions. [2023-08-29 22:25:20,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 256 transitions, 2024 flow [2023-08-29 22:25:20,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 256 transitions, 1976 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-29 22:25:20,991 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 1049 flow [2023-08-29 22:25:20,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1049, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2023-08-29 22:25:20,992 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 45 predicate places. [2023-08-29 22:25:20,992 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 1049 flow [2023-08-29 22:25:20,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.8125) internal successors, (1725), 16 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:20,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:25:20,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:25:21,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-29 22:25:21,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:25:21,200 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:25:21,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:25:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1939873210, now seen corresponding path program 1 times [2023-08-29 22:25:21,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:25:21,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349992377] [2023-08-29 22:25:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:25:21,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:25:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:25:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:25:21,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:25:21,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349992377] [2023-08-29 22:25:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349992377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:25:21,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368847090] [2023-08-29 22:25:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:25:21,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:25:21,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:25:21,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:25:21,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 22:25:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:25:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:25:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:25:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:25:35,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:25:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:25:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368847090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:25:38,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:25:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-29 22:25:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851292303] [2023-08-29 22:25:38,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:25:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:25:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:25:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:25:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2023-08-29 22:25:40,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:43,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:45,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:48,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:50,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:52,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:53,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:25:53,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-29 22:25:53,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 1049 flow. Second operand has 16 states, 16 states have (on average 108.0625) internal successors, (1729), 16 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:25:53,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:25:53,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-29 22:25:53,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:26:00,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:02,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:07,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:10,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:12,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:14,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:16,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:23,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:25,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:29,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:31,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:26:32,206 INFO L130 PetriNetUnfolder]: 3835/5340 cut-off events. [2023-08-29 22:26:32,206 INFO L131 PetriNetUnfolder]: For 22571/22571 co-relation queries the response was YES. [2023-08-29 22:26:32,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29943 conditions, 5340 events. 3835/5340 cut-off events. For 22571/22571 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23955 event pairs, 283 based on Foata normal form. 19/5359 useless extension candidates. Maximal degree in co-relation 29911. Up to 3513 conditions per place. [2023-08-29 22:26:32,245 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 253 selfloop transitions, 91 changer transitions 28/372 dead transitions. [2023-08-29 22:26:32,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 372 transitions, 3604 flow [2023-08-29 22:26:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:26:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:26:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1899 transitions. [2023-08-29 22:26:32,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43475274725274726 [2023-08-29 22:26:32,252 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1899 transitions. [2023-08-29 22:26:32,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1899 transitions. [2023-08-29 22:26:32,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:26:32,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1899 transitions. [2023-08-29 22:26:32,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 118.6875) internal successors, (1899), 16 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:32,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:32,262 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:32,262 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 1049 flow. Second operand 16 states and 1899 transitions. [2023-08-29 22:26:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 372 transitions, 3604 flow [2023-08-29 22:26:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 372 transitions, 3491 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-08-29 22:26:32,321 INFO L231 Difference]: Finished difference. Result has 120 places, 192 transitions, 2177 flow [2023-08-29 22:26:32,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2177, PETRI_PLACES=120, PETRI_TRANSITIONS=192} [2023-08-29 22:26:32,322 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 69 predicate places. [2023-08-29 22:26:32,322 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 192 transitions, 2177 flow [2023-08-29 22:26:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.0625) internal successors, (1729), 16 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:26:32,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:26:32,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:26:32,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:26:32,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:26:32,530 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:26:32,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:26:32,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1467567366, now seen corresponding path program 2 times [2023-08-29 22:26:32,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:26:32,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541310538] [2023-08-29 22:26:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:26:32,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:26:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:26:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:26:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:26:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541310538] [2023-08-29 22:26:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541310538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:26:33,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398177957] [2023-08-29 22:26:33,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:26:33,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:26:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:26:33,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:26:33,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 22:26:33,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:26:33,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:26:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:26:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:27:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:27:00,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:27:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:27:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398177957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:27:24,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:27:24,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-29 22:27:24,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220441930] [2023-08-29 22:27:24,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:27:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 22:27:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:27:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 22:27:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=217, Unknown=3, NotChecked=0, Total=306 [2023-08-29 22:27:26,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:27,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:27,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-29 22:27:27,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 192 transitions, 2177 flow. Second operand has 18 states, 18 states have (on average 107.61111111111111) internal successors, (1937), 18 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:27:27,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:27:27,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-29 22:27:27,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:27:30,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:32,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:34,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:40,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:42,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:43,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:46,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:48,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:27:50,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:00,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:02,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:04,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:05,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:07,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:09,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:12,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:14,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:17,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:18,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:21,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:24,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:26,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:28,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:30,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:34,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:36,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:38,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:40,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:42,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:45,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:47,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:50,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:53,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:28:54,092 INFO L130 PetriNetUnfolder]: 6165/8818 cut-off events. [2023-08-29 22:28:54,092 INFO L131 PetriNetUnfolder]: For 57736/57736 co-relation queries the response was YES. [2023-08-29 22:28:54,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53746 conditions, 8818 events. 6165/8818 cut-off events. For 57736/57736 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45870 event pairs, 216 based on Foata normal form. 22/8840 useless extension candidates. Maximal degree in co-relation 53703. Up to 3818 conditions per place. [2023-08-29 22:28:54,165 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 374 selfloop transitions, 228 changer transitions 87/689 dead transitions. [2023-08-29 22:28:54,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 689 transitions, 7412 flow [2023-08-29 22:28:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-29 22:28:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-29 22:28:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3270 transitions. [2023-08-29 22:28:54,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42778649921507067 [2023-08-29 22:28:54,172 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3270 transitions. [2023-08-29 22:28:54,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3270 transitions. [2023-08-29 22:28:54,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:28:54,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3270 transitions. [2023-08-29 22:28:54,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 116.78571428571429) internal successors, (3270), 28 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:54,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 273.0) internal successors, (7917), 29 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:54,187 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 273.0) internal successors, (7917), 29 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:54,187 INFO L175 Difference]: Start difference. First operand has 120 places, 192 transitions, 2177 flow. Second operand 28 states and 3270 transitions. [2023-08-29 22:28:54,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 689 transitions, 7412 flow [2023-08-29 22:28:54,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 689 transitions, 6827 flow, removed 288 selfloop flow, removed 1 redundant places. [2023-08-29 22:28:54,439 INFO L231 Difference]: Finished difference. Result has 162 places, 371 transitions, 4565 flow [2023-08-29 22:28:54,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4565, PETRI_PLACES=162, PETRI_TRANSITIONS=371} [2023-08-29 22:28:54,440 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 111 predicate places. [2023-08-29 22:28:54,440 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 371 transitions, 4565 flow [2023-08-29 22:28:54,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.61111111111111) internal successors, (1937), 18 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:28:54,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:28:54,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:28:54,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:28:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:28:54,647 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:28:54,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:28:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1189040241, now seen corresponding path program 2 times [2023-08-29 22:28:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:28:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207052421] [2023-08-29 22:28:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:28:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:28:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:28:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:28:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:28:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207052421] [2023-08-29 22:28:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207052421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:28:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063656724] [2023-08-29 22:28:55,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:28:55,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:28:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:28:55,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:28:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 22:28:55,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:28:55,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:28:55,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 22:28:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:29:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:29:06,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:29:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:29:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063656724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:29:15,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:29:15,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-29 22:29:15,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068135780] [2023-08-29 22:29:15,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:29:15,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 22:29:15,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:29:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 22:29:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=171, Unknown=3, NotChecked=0, Total=240 [2023-08-29 22:29:17,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:19,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:22,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:24,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:26,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:28,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:28,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-29 22:29:28,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 371 transitions, 4565 flow. Second operand has 16 states, 16 states have (on average 107.6875) internal successors, (1723), 16 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:29:28,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:29:28,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-29 22:29:28,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:29:31,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:42,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:50,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:51,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:53,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:55,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:29:57,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:05,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:07,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:10,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:13,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:15,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:17,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:21,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:23,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:27,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:27,758 INFO L130 PetriNetUnfolder]: 8383/12106 cut-off events. [2023-08-29 22:30:27,758 INFO L131 PetriNetUnfolder]: For 105352/105352 co-relation queries the response was YES. [2023-08-29 22:30:27,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78564 conditions, 12106 events. 8383/12106 cut-off events. For 105352/105352 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 66902 event pairs, 1079 based on Foata normal form. 30/12136 useless extension candidates. Maximal degree in co-relation 78504. Up to 8674 conditions per place. [2023-08-29 22:30:27,888 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 536 selfloop transitions, 156 changer transitions 19/711 dead transitions. [2023-08-29 22:30:27,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 711 transitions, 9112 flow [2023-08-29 22:30:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:30:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:30:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1917 transitions. [2023-08-29 22:30:27,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43887362637362637 [2023-08-29 22:30:27,892 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1917 transitions. [2023-08-29 22:30:27,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1917 transitions. [2023-08-29 22:30:27,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:30:27,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1917 transitions. [2023-08-29 22:30:27,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 119.8125) internal successors, (1917), 16 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:30:27,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:30:27,900 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 273.0) internal successors, (4641), 17 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:30:27,900 INFO L175 Difference]: Start difference. First operand has 162 places, 371 transitions, 4565 flow. Second operand 16 states and 1917 transitions. [2023-08-29 22:30:27,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 711 transitions, 9112 flow [2023-08-29 22:30:28,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 711 transitions, 8546 flow, removed 273 selfloop flow, removed 5 redundant places. [2023-08-29 22:30:28,694 INFO L231 Difference]: Finished difference. Result has 177 places, 505 transitions, 6443 flow [2023-08-29 22:30:28,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6443, PETRI_PLACES=177, PETRI_TRANSITIONS=505} [2023-08-29 22:30:28,694 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 126 predicate places. [2023-08-29 22:30:28,695 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 505 transitions, 6443 flow [2023-08-29 22:30:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.6875) internal successors, (1723), 16 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:30:28,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:30:28,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:30:28,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 22:30:28,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 22:30:28,896 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:30:28,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:30:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1917313334, now seen corresponding path program 3 times [2023-08-29 22:30:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:30:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510012077] [2023-08-29 22:30:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:30:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:30:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:30:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:30:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:30:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510012077] [2023-08-29 22:30:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510012077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:30:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831946089] [2023-08-29 22:30:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 22:30:29,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:30:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:30:29,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:30:29,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 22:30:29,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 22:30:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:30:29,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 22:30:29,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:30:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:30:30,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:30:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:30:30,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831946089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:30:30,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:30:30,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-29 22:30:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232275873] [2023-08-29 22:30:30,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:30:30,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 22:30:30,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:30:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 22:30:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-08-29 22:30:32,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:32,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-29 22:30:32,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 505 transitions, 6443 flow. Second operand has 15 states, 15 states have (on average 120.2) internal successors, (1803), 15 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:30:32,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:30:32,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-29 22:30:32,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:30:36,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:38,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:41,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:46,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:49,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:30:51,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:04,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:05,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:09,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 22:31:10,013 INFO L130 PetriNetUnfolder]: 11655/16933 cut-off events. [2023-08-29 22:31:10,014 INFO L131 PetriNetUnfolder]: For 202238/202238 co-relation queries the response was YES. [2023-08-29 22:31:10,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118936 conditions, 16933 events. 11655/16933 cut-off events. For 202238/202238 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 98104 event pairs, 1041 based on Foata normal form. 536/17469 useless extension candidates. Maximal degree in co-relation 118869. Up to 4771 conditions per place. [2023-08-29 22:31:10,145 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 931 selfloop transitions, 209 changer transitions 21/1161 dead transitions. [2023-08-29 22:31:10,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1161 transitions, 16549 flow [2023-08-29 22:31:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 22:31:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 22:31:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2222 transitions. [2023-08-29 22:31:10,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787761258349494 [2023-08-29 22:31:10,149 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2222 transitions. [2023-08-29 22:31:10,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2222 transitions. [2023-08-29 22:31:10,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:31:10,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2222 transitions. [2023-08-29 22:31:10,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 130.7058823529412) internal successors, (2222), 17 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:31:10,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 273.0) internal successors, (4914), 18 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:31:10,157 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 273.0) internal successors, (4914), 18 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:31:10,157 INFO L175 Difference]: Start difference. First operand has 177 places, 505 transitions, 6443 flow. Second operand 17 states and 2222 transitions. [2023-08-29 22:31:10,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1161 transitions, 16549 flow [2023-08-29 22:31:11,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 1161 transitions, 15018 flow, removed 743 selfloop flow, removed 3 redundant places. [2023-08-29 22:31:11,215 INFO L231 Difference]: Finished difference. Result has 203 places, 602 transitions, 7823 flow [2023-08-29 22:31:11,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7823, PETRI_PLACES=203, PETRI_TRANSITIONS=602} [2023-08-29 22:31:11,216 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 152 predicate places. [2023-08-29 22:31:11,216 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 602 transitions, 7823 flow [2023-08-29 22:31:11,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.2) internal successors, (1803), 15 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:31:11,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:31:11,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:31:11,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:31:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:31:11,423 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 22:31:11,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:31:11,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1712152109, now seen corresponding path program 4 times [2023-08-29 22:31:11,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:31:11,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772244265] [2023-08-29 22:31:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:31:11,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:31:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:31:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:31:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:31:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772244265] [2023-08-29 22:31:11,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772244265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:31:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717729324] [2023-08-29 22:31:11,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 22:31:11,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:31:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:31:11,649 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:31:11,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Killed by 15