./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --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 [2023-08-30 00:48:52,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:48:52,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:48:52,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:48:52,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:48:52,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:48:52,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:48:52,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:48:52,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:48:52,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:48:52,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:48:52,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:48:52,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:48:52,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:48:52,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:48:52,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:48:52,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:48:52,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:48:52,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:48:52,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:48:52,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:48:52,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:48:52,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:48:52,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:48:52,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:48:52,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:48:52,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:48:52,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:48:52,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:48:52,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:48:52,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:48:52,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:48:52,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:48:52,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:48:52,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:48:52,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:48:52,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:48:52,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:48:52,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:48:52,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:48:52,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:48:52,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:48:52,496 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:48:52,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:48:52,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:48:52,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:48:52,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:48:52,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:48:52,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:48:52,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:48:52,499 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:48:52,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:48:52,499 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:48:52,500 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:48:52,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:48:52,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:48:52,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:48:52,500 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:48:52,500 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:48:52,501 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:48:52,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:48:52,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:48:52,501 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:48:52,501 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:48:52,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:48:52,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:48:52,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:48:52,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:48:52,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:48:52,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:48:52,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:48:52,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:48:52,503 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:48:52,503 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:48:52,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:48:52,503 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:48:52,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:48:52,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:48:52,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:48:52,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:48:52,764 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:48:52,764 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:48:52,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-30 00:48:53,736 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:48:53,906 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:48:53,907 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-30 00:48:53,912 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1070349bf/ec7880e9fcdc4de6a42ec5df3e1ec44d/FLAG6bbe6fcaa [2023-08-30 00:48:53,928 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1070349bf/ec7880e9fcdc4de6a42ec5df3e1ec44d [2023-08-30 00:48:53,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:48:53,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:48:53,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:48:53,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:48:53,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:48:53,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:48:53" (1/1) ... [2023-08-30 00:48:53,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15dd43e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:53, skipping insertion in model container [2023-08-30 00:48:53,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:48:53" (1/1) ... [2023-08-30 00:48:53,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:48:53,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:48:54,037 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/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-30 00:48:54,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:48:54,046 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:48:54,063 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/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-30 00:48:54,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:48:54,074 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:48:54,074 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:48:54,078 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:48:54,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54 WrapperNode [2023-08-30 00:48:54,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:48:54,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:48:54,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:48:54,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:48:54,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,114 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-08-30 00:48:54,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:48:54,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:48:54,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:48:54,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:48:54,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:48:54,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:48:54,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:48:54,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:48:54,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (1/1) ... [2023-08-30 00:48:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:48:54,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:54,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:48:54,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:48:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:48:54,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:48:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:48:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:48:54,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:48:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:48:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:48:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:48:54,201 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:48:54,282 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:48:54,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:48:54,499 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:48:54,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:48:54,523 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 00:48:54,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:48:54 BoogieIcfgContainer [2023-08-30 00:48:54,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:48:54,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:48:54,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:48:54,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:48:54,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:48:53" (1/3) ... [2023-08-30 00:48:54,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58786b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:48:54, skipping insertion in model container [2023-08-30 00:48:54,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:48:54" (2/3) ... [2023-08-30 00:48:54,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58786b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:48:54, skipping insertion in model container [2023-08-30 00:48:54,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:48:54" (3/3) ... [2023-08-30 00:48:54,529 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-08-30 00:48:54,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:48:54,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 00:48:54,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:48:54,573 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 00:48:54,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2023-08-30 00:48:54,620 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2023-08-30 00:48:54,621 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:48:54,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 00:48:54,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2023-08-30 00:48:54,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 82 transitions, 176 flow [2023-08-30 00:48:54,628 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:48:54,633 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 82 transitions, 176 flow [2023-08-30 00:48:54,635 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 82 transitions, 176 flow [2023-08-30 00:48:54,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 176 flow [2023-08-30 00:48:54,648 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-08-30 00:48:54,649 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 00:48:54,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 00:48:54,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-30 00:48:56,682 INFO L134 LiptonReduction]: Checked pairs total: 665 [2023-08-30 00:48:56,682 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-30 00:48:56,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:48:56,695 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;@3bf2d5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:48:56,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 00:48:56,696 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 00:48:56,696 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:48:56,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:56,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:48:56,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:56,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:56,700 INFO L85 PathProgramCache]: Analyzing trace with hash 356, now seen corresponding path program 1 times [2023-08-30 00:48:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:56,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218668142] [2023-08-30 00:48:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:56,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:56,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218668142] [2023-08-30 00:48:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218668142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:56,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:56,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:48:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260515119] [2023-08-30 00:48:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:48:56,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:48:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:48:56,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-08-30 00:48:56,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:56,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:56,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-08-30 00:48:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:56,851 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-08-30 00:48:56,851 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 00:48:56,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 506 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-30 00:48:56,854 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-30 00:48:56,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-30 00:48:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:48:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:48:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 176 transitions. [2023-08-30 00:48:56,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2023-08-30 00:48:56,867 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 176 transitions. [2023-08-30 00:48:56,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 176 transitions. [2023-08-30 00:48:56,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:56,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 176 transitions. [2023-08-30 00:48:56,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:56,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:56,880 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:56,881 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 176 transitions. [2023-08-30 00:48:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-30 00:48:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 00:48:56,884 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-30 00:48:56,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 00:48:56,889 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:48:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-30 00:48:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:56,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:56,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:48:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:48:56,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:56,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:56,891 INFO L85 PathProgramCache]: Analyzing trace with hash 351786, now seen corresponding path program 1 times [2023-08-30 00:48:56,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621724363] [2023-08-30 00:48:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621724363] [2023-08-30 00:48:57,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621724363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:57,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:48:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887913496] [2023-08-30 00:48:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:48:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:48:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:48:57,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 00:48:57,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 00:48:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,093 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-08-30 00:48:57,094 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:48:57,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-30 00:48:57,095 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-30 00:48:57,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-30 00:48:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:48:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:48:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-08-30 00:48:57,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580896686159844 [2023-08-30 00:48:57,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-08-30 00:48:57,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-08-30 00:48:57,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-08-30 00:48:57,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,099 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 235 transitions. [2023-08-30 00:48:57,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-30 00:48:57,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:48:57,100 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-30 00:48:57,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-30 00:48:57,101 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-08-30 00:48:57,101 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-30 00:48:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:48:57,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:48:57,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:57,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash 351787, now seen corresponding path program 1 times [2023-08-30 00:48:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140437445] [2023-08-30 00:48:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140437445] [2023-08-30 00:48:57,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140437445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:57,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:48:57,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956850989] [2023-08-30 00:48:57,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:48:57,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:48:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:48:57,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 171 [2023-08-30 00:48:57,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 171 [2023-08-30 00:48:57,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,221 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-08-30 00:48:57,221 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:48:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-30 00:48:57,222 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-30 00:48:57,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-30 00:48:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:48:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:48:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 00:48:57,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079922027290446 [2023-08-30 00:48:57,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 00:48:57,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 00:48:57,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 00:48:57,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,228 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 221 transitions. [2023-08-30 00:48:57,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-30 00:48:57,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:48:57,229 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-30 00:48:57,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-30 00:48:57,230 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:48:57,233 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-30 00:48:57,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:48:57,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:48:57,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:57,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash 338076062, now seen corresponding path program 1 times [2023-08-30 00:48:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:57,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699902971] [2023-08-30 00:48:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:57,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699902971] [2023-08-30 00:48:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699902971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:57,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 00:48:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001780066] [2023-08-30 00:48:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:48:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:48:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:48:57,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-30 00:48:57,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-30 00:48:57,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,399 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-08-30 00:48:57,399 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:48:57,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 282 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-30 00:48:57,400 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-30 00:48:57,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-30 00:48:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:48:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:48:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-08-30 00:48:57,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-30 00:48:57,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-08-30 00:48:57,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-08-30 00:48:57,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-08-30 00:48:57,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,403 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 207 transitions. [2023-08-30 00:48:57,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-30 00:48:57,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:48:57,404 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-30 00:48:57,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-30 00:48:57,405 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:48:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-30 00:48:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:48:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:48:57,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:57,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash 338076064, now seen corresponding path program 1 times [2023-08-30 00:48:57,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:57,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367145604] [2023-08-30 00:48:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367145604] [2023-08-30 00:48:57,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367145604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:57,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:48:57,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868280970] [2023-08-30 00:48:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:48:57,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:48:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:48:57,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 00:48:57,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 00:48:57,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,499 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-08-30 00:48:57,499 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 00:48:57,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-30 00:48:57,500 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-30 00:48:57,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-30 00:48:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:48:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:48:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-08-30 00:48:57,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834307992202727 [2023-08-30 00:48:57,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-08-30 00:48:57,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-08-30 00:48:57,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-08-30 00:48:57,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,504 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 230 transitions. [2023-08-30 00:48:57,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-30 00:48:57,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:48:57,505 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-30 00:48:57,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 00:48:57,507 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-08-30 00:48:57,507 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-30 00:48:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:48:57,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:57,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash -423603408, now seen corresponding path program 1 times [2023-08-30 00:48:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364414170] [2023-08-30 00:48:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364414170] [2023-08-30 00:48:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364414170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:57,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:48:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629162909] [2023-08-30 00:48:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:48:57,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:48:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 00:48:57,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 00:48:57,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 00:48:57,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,664 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-08-30 00:48:57,664 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:48:57,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 243 event pairs, 10 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-08-30 00:48:57,665 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-30 00:48:57,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-30 00:48:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:48:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:48:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2023-08-30 00:48:57,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-08-30 00:48:57,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 309 transitions. [2023-08-30 00:48:57,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 309 transitions. [2023-08-30 00:48:57,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 309 transitions. [2023-08-30 00:48:57,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,668 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 309 transitions. [2023-08-30 00:48:57,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-30 00:48:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:48:57,668 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-08-30 00:48:57,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-30 00:48:57,669 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-08-30 00:48:57,669 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-08-30 00:48:57,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:57,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:48:57,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:57,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1614582855, now seen corresponding path program 1 times [2023-08-30 00:48:57,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:57,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881805093] [2023-08-30 00:48:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:57,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881805093] [2023-08-30 00:48:57,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881805093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:48:57,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:48:57,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519880990] [2023-08-30 00:48:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:48:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:48:57,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:48:57,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 171 [2023-08-30 00:48:57,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 171 [2023-08-30 00:48:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,767 INFO L130 PetriNetUnfolder]: 55/100 cut-off events. [2023-08-30 00:48:57,767 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-08-30 00:48:57,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 100 events. 55/100 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 24 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 254. Up to 76 conditions per place. [2023-08-30 00:48:57,769 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 20 selfloop transitions, 5 changer transitions 2/27 dead transitions. [2023-08-30 00:48:57,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 132 flow [2023-08-30 00:48:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:48:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:48:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2023-08-30 00:48:57,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43625730994152045 [2023-08-30 00:48:57,771 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2023-08-30 00:48:57,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2023-08-30 00:48:57,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2023-08-30 00:48:57,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,773 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,773 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 5 states and 373 transitions. [2023-08-30 00:48:57,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 132 flow [2023-08-30 00:48:57,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 123 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 00:48:57,775 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 75 flow [2023-08-30 00:48:57,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-30 00:48:57,776 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-30 00:48:57,776 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 75 flow [2023-08-30 00:48:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:57,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 00:48:57,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:57,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2104492941, now seen corresponding path program 2 times [2023-08-30 00:48:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026746317] [2023-08-30 00:48:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026746317] [2023-08-30 00:48:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026746317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183264243] [2023-08-30 00:48:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:57,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:57,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:57,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:48:57,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:57,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 00:48:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:57,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 00:48:57,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183264243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:48:57,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 00:48:57,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-30 00:48:57,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450425211] [2023-08-30 00:48:57,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:48:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 00:48:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 00:48:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:48:57,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 171 [2023-08-30 00:48:57,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:57,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 171 [2023-08-30 00:48:57,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:57,987 INFO L130 PetriNetUnfolder]: 62/112 cut-off events. [2023-08-30 00:48:57,988 INFO L131 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2023-08-30 00:48:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 112 events. 62/112 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 21 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 331. Up to 85 conditions per place. [2023-08-30 00:48:57,988 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-08-30 00:48:57,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 149 flow [2023-08-30 00:48:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:48:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:48:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2023-08-30 00:48:57,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45760233918128657 [2023-08-30 00:48:57,993 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2023-08-30 00:48:57,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2023-08-30 00:48:57,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:57,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2023-08-30 00:48:57,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,995 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,995 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 75 flow. Second operand 4 states and 313 transitions. [2023-08-30 00:48:57,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 149 flow [2023-08-30 00:48:57,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 139 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 00:48:57,996 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 89 flow [2023-08-30 00:48:57,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-30 00:48:57,996 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-30 00:48:57,996 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 89 flow [2023-08-30 00:48:57,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:57,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:57,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:58,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:58,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:58,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:58,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1859779205, now seen corresponding path program 1 times [2023-08-30 00:48:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710374236] [2023-08-30 00:48:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:48:58,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710374236] [2023-08-30 00:48:58,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710374236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985971618] [2023-08-30 00:48:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:58,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:58,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:58,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:58,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:48:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:58,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 00:48:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:48:58,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:48:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985971618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:58,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:58,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-30 00:48:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213090518] [2023-08-30 00:48:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:48:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:48:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:48:58,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-08-30 00:48:58,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:58,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-08-30 00:48:58,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:58,475 INFO L130 PetriNetUnfolder]: 64/116 cut-off events. [2023-08-30 00:48:58,476 INFO L131 PetriNetUnfolder]: For 109/113 co-relation queries the response was YES. [2023-08-30 00:48:58,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 116 events. 64/116 cut-off events. For 109/113 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 10 based on Foata normal form. 4/101 useless extension candidates. Maximal degree in co-relation 373. Up to 81 conditions per place. [2023-08-30 00:48:58,477 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 26 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-08-30 00:48:58,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 208 flow [2023-08-30 00:48:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:48:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:48:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-30 00:48:58,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146198830409356 [2023-08-30 00:48:58,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-30 00:48:58,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-30 00:48:58,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:58,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-30 00:48:58,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,482 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 89 flow. Second operand 5 states and 386 transitions. [2023-08-30 00:48:58,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 208 flow [2023-08-30 00:48:58,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 188 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 00:48:58,484 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 120 flow [2023-08-30 00:48:58,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-30 00:48:58,485 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-30 00:48:58,485 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 120 flow [2023-08-30 00:48:58,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:58,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:58,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 00:48:58,690 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,SelfDestructingSolverStorable8 [2023-08-30 00:48:58,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:58,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:58,692 INFO L85 PathProgramCache]: Analyzing trace with hash -972607855, now seen corresponding path program 2 times [2023-08-30 00:48:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437991470] [2023-08-30 00:48:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:58,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:58,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437991470] [2023-08-30 00:48:58,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437991470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406741153] [2023-08-30 00:48:58,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:58,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:58,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:48:58,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:48:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:58,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:58,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406741153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:58,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-08-30 00:48:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236010859] [2023-08-30 00:48:58,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:58,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:48:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:48:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:48:58,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-30 00:48:58,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:58,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:58,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-30 00:48:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:59,037 INFO L130 PetriNetUnfolder]: 112/210 cut-off events. [2023-08-30 00:48:59,037 INFO L131 PetriNetUnfolder]: For 246/250 co-relation queries the response was YES. [2023-08-30 00:48:59,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 210 events. 112/210 cut-off events. For 246/250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 689 event pairs, 16 based on Foata normal form. 5/182 useless extension candidates. Maximal degree in co-relation 700. Up to 87 conditions per place. [2023-08-30 00:48:59,038 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 30 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-08-30 00:48:59,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 295 flow [2023-08-30 00:48:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 00:48:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 00:48:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2023-08-30 00:48:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956140350877193 [2023-08-30 00:48:59,040 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 339 transitions. [2023-08-30 00:48:59,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 339 transitions. [2023-08-30 00:48:59,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:59,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 339 transitions. [2023-08-30 00:48:59,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:59,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:59,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:59,042 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 120 flow. Second operand 4 states and 339 transitions. [2023-08-30 00:48:59,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 295 flow [2023-08-30 00:48:59,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 00:48:59,044 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 174 flow [2023-08-30 00:48:59,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-30 00:48:59,044 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-08-30 00:48:59,044 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 174 flow [2023-08-30 00:48:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:59,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:59,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:48:59,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:59,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:48:59,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash 289175066, now seen corresponding path program 3 times [2023-08-30 00:48:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:59,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996360456] [2023-08-30 00:48:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996360456] [2023-08-30 00:48:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996360456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:59,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418110213] [2023-08-30 00:48:59,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:48:59,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:59,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:59,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:59,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:48:59,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:48:59,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:59,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:48:59,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:59,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418110213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:59,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 00:48:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893309833] [2023-08-30 00:48:59,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:48:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:48:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:48:59,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:48:59,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 174 flow. Second operand has 18 states, 18 states have (on average 69.22222222222223) internal successors, (1246), 18 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:59,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:59,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:48:59,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:00,027 INFO L130 PetriNetUnfolder]: 259/482 cut-off events. [2023-08-30 00:49:00,027 INFO L131 PetriNetUnfolder]: For 945/945 co-relation queries the response was YES. [2023-08-30 00:49:00,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 482 events. 259/482 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1943 event pairs, 25 based on Foata normal form. 42/524 useless extension candidates. Maximal degree in co-relation 1749. Up to 165 conditions per place. [2023-08-30 00:49:00,030 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 78 selfloop transitions, 42 changer transitions 4/124 dead transitions. [2023-08-30 00:49:00,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 124 transitions, 845 flow [2023-08-30 00:49:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:49:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:49:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1455 transitions. [2023-08-30 00:49:00,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-30 00:49:00,040 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1455 transitions. [2023-08-30 00:49:00,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1455 transitions. [2023-08-30 00:49:00,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:00,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1455 transitions. [2023-08-30 00:49:00,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.75) internal successors, (1455), 20 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,046 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,046 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 174 flow. Second operand 20 states and 1455 transitions. [2023-08-30 00:49:00,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 124 transitions, 845 flow [2023-08-30 00:49:00,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 124 transitions, 841 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 00:49:00,049 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 561 flow [2023-08-30 00:49:00,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=561, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-30 00:49:00,049 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-08-30 00:49:00,050 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 561 flow [2023-08-30 00:49:00,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.22222222222223) internal successors, (1246), 18 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:00,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:00,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:00,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:00,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:00,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1047829290, now seen corresponding path program 4 times [2023-08-30 00:49:00,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:00,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020119339] [2023-08-30 00:49:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:00,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:00,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020119339] [2023-08-30 00:49:00,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020119339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:00,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261302580] [2023-08-30 00:49:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:49:00,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:00,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:00,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:49:00,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:49:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 00:49:00,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:00,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:00,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261302580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:00,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:00,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-30 00:49:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242633818] [2023-08-30 00:49:00,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:49:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:49:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:49:00,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:00,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 561 flow. Second operand has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:00,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:00,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:00,884 INFO L130 PetriNetUnfolder]: 393/744 cut-off events. [2023-08-30 00:49:00,885 INFO L131 PetriNetUnfolder]: For 4625/4625 co-relation queries the response was YES. [2023-08-30 00:49:00,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 744 events. 393/744 cut-off events. For 4625/4625 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3474 event pairs, 25 based on Foata normal form. 12/756 useless extension candidates. Maximal degree in co-relation 3989. Up to 280 conditions per place. [2023-08-30 00:49:00,889 INFO L137 encePairwiseOnDemand]: 165/171 looper letters, 87 selfloop transitions, 47 changer transitions 11/145 dead transitions. [2023-08-30 00:49:00,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 145 transitions, 1456 flow [2023-08-30 00:49:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:49:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:49:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1171 transitions. [2023-08-30 00:49:00,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279970760233918 [2023-08-30 00:49:00,892 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1171 transitions. [2023-08-30 00:49:00,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1171 transitions. [2023-08-30 00:49:00,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:00,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1171 transitions. [2023-08-30 00:49:00,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,897 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,897 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 561 flow. Second operand 16 states and 1171 transitions. [2023-08-30 00:49:00,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 145 transitions, 1456 flow [2023-08-30 00:49:00,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 145 transitions, 1294 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-30 00:49:00,908 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 825 flow [2023-08-30 00:49:00,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=825, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2023-08-30 00:49:00,910 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-08-30 00:49:00,910 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 825 flow [2023-08-30 00:49:00,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:00,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:00,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:00,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:01,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 00:49:01,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:01,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:01,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1350612766, now seen corresponding path program 5 times [2023-08-30 00:49:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:01,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28074426] [2023-08-30 00:49:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:01,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28074426] [2023-08-30 00:49:01,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28074426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465663798] [2023-08-30 00:49:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:49:01,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:01,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:01,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:49:01,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:49:01,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:49:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:01,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:01,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465663798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:01,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:01,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 00:49:01,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458620527] [2023-08-30 00:49:01,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:01,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:49:01,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:49:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:49:01,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:01,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 825 flow. Second operand has 17 states, 17 states have (on average 69.52941176470588) internal successors, (1182), 17 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:01,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:01,816 INFO L130 PetriNetUnfolder]: 510/956 cut-off events. [2023-08-30 00:49:01,817 INFO L131 PetriNetUnfolder]: For 9182/9182 co-relation queries the response was YES. [2023-08-30 00:49:01,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5533 conditions, 956 events. 510/956 cut-off events. For 9182/9182 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4775 event pairs, 7 based on Foata normal form. 38/994 useless extension candidates. Maximal degree in co-relation 5506. Up to 439 conditions per place. [2023-08-30 00:49:01,822 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 84 selfloop transitions, 74 changer transitions 1/159 dead transitions. [2023-08-30 00:49:01,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 159 transitions, 1768 flow [2023-08-30 00:49:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 00:49:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 00:49:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1235 transitions. [2023-08-30 00:49:01,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42483660130718953 [2023-08-30 00:49:01,825 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1235 transitions. [2023-08-30 00:49:01,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1235 transitions. [2023-08-30 00:49:01,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:01,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1235 transitions. [2023-08-30 00:49:01,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 72.6470588235294) internal successors, (1235), 17 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,830 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,830 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 825 flow. Second operand 17 states and 1235 transitions. [2023-08-30 00:49:01,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 159 transitions, 1768 flow [2023-08-30 00:49:01,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1623 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-08-30 00:49:01,848 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1382 flow [2023-08-30 00:49:01,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1382, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2023-08-30 00:49:01,849 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-08-30 00:49:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1382 flow [2023-08-30 00:49:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.52941176470588) internal successors, (1182), 17 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:01,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:01,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:01,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:02,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:02,054 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:02,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2114754455, now seen corresponding path program 6 times [2023-08-30 00:49:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035203697] [2023-08-30 00:49:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:02,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035203697] [2023-08-30 00:49:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035203697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698393866] [2023-08-30 00:49:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:49:02,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:02,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:02,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:02,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:49:02,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:49:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:49:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:02,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698393866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:02,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:02,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 00:49:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578689444] [2023-08-30 00:49:02,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:49:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:02,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:49:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:49:02,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:02,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1382 flow. Second operand has 20 states, 20 states have (on average 69.05) internal successors, (1381), 20 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:02,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:02,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:02,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:02,885 INFO L130 PetriNetUnfolder]: 703/1373 cut-off events. [2023-08-30 00:49:02,885 INFO L131 PetriNetUnfolder]: For 31723/31723 co-relation queries the response was YES. [2023-08-30 00:49:02,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10356 conditions, 1373 events. 703/1373 cut-off events. For 31723/31723 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8014 event pairs, 18 based on Foata normal form. 16/1389 useless extension candidates. Maximal degree in co-relation 10320. Up to 417 conditions per place. [2023-08-30 00:49:02,894 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 118 selfloop transitions, 142 changer transitions 12/272 dead transitions. [2023-08-30 00:49:02,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 272 transitions, 3822 flow [2023-08-30 00:49:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 00:49:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 00:49:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1808 transitions. [2023-08-30 00:49:02,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42292397660818715 [2023-08-30 00:49:02,899 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1808 transitions. [2023-08-30 00:49:02,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1808 transitions. [2023-08-30 00:49:02,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:02,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1808 transitions. [2023-08-30 00:49:02,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 72.32) internal successors, (1808), 25 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:02,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:02,910 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:02,910 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1382 flow. Second operand 25 states and 1808 transitions. [2023-08-30 00:49:02,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 272 transitions, 3822 flow [2023-08-30 00:49:03,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 272 transitions, 3649 flow, removed 77 selfloop flow, removed 5 redundant places. [2023-08-30 00:49:03,041 INFO L231 Difference]: Finished difference. Result has 135 places, 183 transitions, 2833 flow [2023-08-30 00:49:03,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2833, PETRI_PLACES=135, PETRI_TRANSITIONS=183} [2023-08-30 00:49:03,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2023-08-30 00:49:03,041 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 183 transitions, 2833 flow [2023-08-30 00:49:03,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.05) internal successors, (1381), 20 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:03,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:03,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:03,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:03,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:03,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1554108490, now seen corresponding path program 7 times [2023-08-30 00:49:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837810019] [2023-08-30 00:49:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837810019] [2023-08-30 00:49:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837810019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053491448] [2023-08-30 00:49:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:49:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:03,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:03,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:49:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:49:03,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053491448] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:03,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:03,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 00:49:03,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981298338] [2023-08-30 00:49:03,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:03,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:49:03,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:49:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:49:03,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:03,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 183 transitions, 2833 flow. Second operand has 16 states, 16 states have (on average 69.4375) internal successors, (1111), 16 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:03,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:03,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:03,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:04,061 INFO L130 PetriNetUnfolder]: 666/1353 cut-off events. [2023-08-30 00:49:04,062 INFO L131 PetriNetUnfolder]: For 51531/51531 co-relation queries the response was YES. [2023-08-30 00:49:04,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 1353 events. 666/1353 cut-off events. For 51531/51531 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8153 event pairs, 55 based on Foata normal form. 50/1403 useless extension candidates. Maximal degree in co-relation 11319. Up to 506 conditions per place. [2023-08-30 00:49:04,072 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 117 selfloop transitions, 136 changer transitions 8/261 dead transitions. [2023-08-30 00:49:04,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 261 transitions, 4075 flow [2023-08-30 00:49:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:49:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:49:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1594 transitions. [2023-08-30 00:49:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42371079213184476 [2023-08-30 00:49:04,075 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1594 transitions. [2023-08-30 00:49:04,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1594 transitions. [2023-08-30 00:49:04,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:04,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1594 transitions. [2023-08-30 00:49:04,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.45454545454545) internal successors, (1594), 22 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:04,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:04,081 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:04,081 INFO L175 Difference]: Start difference. First operand has 135 places, 183 transitions, 2833 flow. Second operand 22 states and 1594 transitions. [2023-08-30 00:49:04,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 261 transitions, 4075 flow [2023-08-30 00:49:04,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 261 transitions, 3342 flow, removed 356 selfloop flow, removed 6 redundant places. [2023-08-30 00:49:04,190 INFO L231 Difference]: Finished difference. Result has 153 places, 191 transitions, 2703 flow [2023-08-30 00:49:04,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2703, PETRI_PLACES=153, PETRI_TRANSITIONS=191} [2023-08-30 00:49:04,190 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2023-08-30 00:49:04,190 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 191 transitions, 2703 flow [2023-08-30 00:49:04,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.4375) internal successors, (1111), 16 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:04,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:04,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:04,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:04,395 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,SelfDestructingSolverStorable14 [2023-08-30 00:49:04,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:04,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -543608332, now seen corresponding path program 8 times [2023-08-30 00:49:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604755358] [2023-08-30 00:49:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:04,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604755358] [2023-08-30 00:49:04,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604755358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902746305] [2023-08-30 00:49:04,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:49:04,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:04,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:04,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:04,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 00:49:04,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:49:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:49:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:04,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902746305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:04,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-30 00:49:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441602758] [2023-08-30 00:49:04,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:04,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 00:49:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 00:49:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 00:49:04,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:04,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 191 transitions, 2703 flow. Second operand has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:04,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:04,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:04,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:05,102 INFO L130 PetriNetUnfolder]: 657/1313 cut-off events. [2023-08-30 00:49:05,103 INFO L131 PetriNetUnfolder]: For 42327/42327 co-relation queries the response was YES. [2023-08-30 00:49:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10418 conditions, 1313 events. 657/1313 cut-off events. For 42327/42327 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7846 event pairs, 17 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 10371. Up to 408 conditions per place. [2023-08-30 00:49:05,112 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 141 selfloop transitions, 108 changer transitions 9/258 dead transitions. [2023-08-30 00:49:05,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 258 transitions, 3951 flow [2023-08-30 00:49:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 00:49:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 00:49:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1435 transitions. [2023-08-30 00:49:05,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195906432748538 [2023-08-30 00:49:05,115 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1435 transitions. [2023-08-30 00:49:05,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1435 transitions. [2023-08-30 00:49:05,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:05,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1435 transitions. [2023-08-30 00:49:05,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.75) internal successors, (1435), 20 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:05,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:05,121 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:05,121 INFO L175 Difference]: Start difference. First operand has 153 places, 191 transitions, 2703 flow. Second operand 20 states and 1435 transitions. [2023-08-30 00:49:05,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 258 transitions, 3951 flow [2023-08-30 00:49:05,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 258 transitions, 3828 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-08-30 00:49:05,189 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 3137 flow [2023-08-30 00:49:05,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3137, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2023-08-30 00:49:05,190 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-08-30 00:49:05,191 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 3137 flow [2023-08-30 00:49:05,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:05,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:05,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:05,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 00:49:05,398 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:05,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -508746160, now seen corresponding path program 9 times [2023-08-30 00:49:05,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:05,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991060225] [2023-08-30 00:49:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991060225] [2023-08-30 00:49:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991060225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513992338] [2023-08-30 00:49:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:49:05,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:05,496 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:05,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 00:49:05,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:49:05,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:49:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:05,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:05,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513992338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:05,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:05,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-08-30 00:49:05,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833543428] [2023-08-30 00:49:05,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 00:49:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:05,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 00:49:05,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 00:49:05,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-30 00:49:05,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 3137 flow. Second operand has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:05,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:05,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-30 00:49:05,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:06,115 INFO L130 PetriNetUnfolder]: 1070/2125 cut-off events. [2023-08-30 00:49:06,116 INFO L131 PetriNetUnfolder]: For 87960/87969 co-relation queries the response was YES. [2023-08-30 00:49:06,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18666 conditions, 2125 events. 1070/2125 cut-off events. For 87960/87969 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14061 event pairs, 155 based on Foata normal form. 9/2127 useless extension candidates. Maximal degree in co-relation 18615. Up to 905 conditions per place. [2023-08-30 00:49:06,136 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 208 selfloop transitions, 102 changer transitions 68/386 dead transitions. [2023-08-30 00:49:06,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 386 transitions, 6641 flow [2023-08-30 00:49:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:49:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:49:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-08-30 00:49:06,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4982456140350877 [2023-08-30 00:49:06,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-08-30 00:49:06,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-08-30 00:49:06,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:06,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-08-30 00:49:06,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,140 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 3137 flow. Second operand 5 states and 426 transitions. [2023-08-30 00:49:06,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 386 transitions, 6641 flow [2023-08-30 00:49:06,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 386 transitions, 6296 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-08-30 00:49:06,274 INFO L231 Difference]: Finished difference. Result has 163 places, 273 transitions, 4630 flow [2023-08-30 00:49:06,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4630, PETRI_PLACES=163, PETRI_TRANSITIONS=273} [2023-08-30 00:49:06,275 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-08-30 00:49:06,275 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 273 transitions, 4630 flow [2023-08-30 00:49:06,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:06,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:06,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:06,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 00:49:06,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:06,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540044, now seen corresponding path program 10 times [2023-08-30 00:49:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519950805] [2023-08-30 00:49:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:06,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519950805] [2023-08-30 00:49:06,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519950805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213599885] [2023-08-30 00:49:06,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:49:06,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:06,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:06,570 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:06,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 00:49:06,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:49:06,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:06,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:49:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:49:06,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:49:06,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213599885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:06,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:06,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2023-08-30 00:49:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126002604] [2023-08-30 00:49:06,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:49:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:49:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:49:06,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:06,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 273 transitions, 4630 flow. Second operand has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:06,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:06,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:06,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:07,317 INFO L130 PetriNetUnfolder]: 1044/2130 cut-off events. [2023-08-30 00:49:07,318 INFO L131 PetriNetUnfolder]: For 100983/100983 co-relation queries the response was YES. [2023-08-30 00:49:07,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18833 conditions, 2130 events. 1044/2130 cut-off events. For 100983/100983 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14360 event pairs, 144 based on Foata normal form. 78/2208 useless extension candidates. Maximal degree in co-relation 18779. Up to 1558 conditions per place. [2023-08-30 00:49:07,335 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 262 selfloop transitions, 92 changer transitions 50/404 dead transitions. [2023-08-30 00:49:07,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 404 transitions, 7078 flow [2023-08-30 00:49:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 00:49:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 00:49:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1393 transitions. [2023-08-30 00:49:07,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42874730686365037 [2023-08-30 00:49:07,338 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1393 transitions. [2023-08-30 00:49:07,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1393 transitions. [2023-08-30 00:49:07,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:07,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1393 transitions. [2023-08-30 00:49:07,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 171.0) internal successors, (3420), 20 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,342 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 171.0) internal successors, (3420), 20 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,342 INFO L175 Difference]: Start difference. First operand has 163 places, 273 transitions, 4630 flow. Second operand 19 states and 1393 transitions. [2023-08-30 00:49:07,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 404 transitions, 7078 flow [2023-08-30 00:49:07,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 404 transitions, 7004 flow, removed 37 selfloop flow, removed 0 redundant places. [2023-08-30 00:49:07,521 INFO L231 Difference]: Finished difference. Result has 188 places, 306 transitions, 5559 flow [2023-08-30 00:49:07,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5559, PETRI_PLACES=188, PETRI_TRANSITIONS=306} [2023-08-30 00:49:07,522 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2023-08-30 00:49:07,522 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 306 transitions, 5559 flow [2023-08-30 00:49:07,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:07,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:07,523 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:07,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 00:49:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 00:49:07,725 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:07,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 97342477, now seen corresponding path program 11 times [2023-08-30 00:49:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:07,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618923333] [2023-08-30 00:49:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:07,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:07,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618923333] [2023-08-30 00:49:07,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618923333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634642624] [2023-08-30 00:49:07,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:49:07,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:07,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:07,841 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:07,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 00:49:07,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:49:07,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:49:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:07,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634642624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:08,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 00:49:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080096651] [2023-08-30 00:49:08,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:49:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:49:08,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:49:08,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:08,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 306 transitions, 5559 flow. Second operand has 21 states, 21 states have (on average 69.19047619047619) internal successors, (1453), 21 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:08,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:08,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:08,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:09,265 INFO L130 PetriNetUnfolder]: 1329/2704 cut-off events. [2023-08-30 00:49:09,265 INFO L131 PetriNetUnfolder]: For 169816/169816 co-relation queries the response was YES. [2023-08-30 00:49:09,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26768 conditions, 2704 events. 1329/2704 cut-off events. For 169816/169816 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 19148 event pairs, 68 based on Foata normal form. 36/2740 useless extension candidates. Maximal degree in co-relation 26706. Up to 717 conditions per place. [2023-08-30 00:49:09,285 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 168 selfloop transitions, 317 changer transitions 55/540 dead transitions. [2023-08-30 00:49:09,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 540 transitions, 9909 flow [2023-08-30 00:49:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:49:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:49:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1760 transitions. [2023-08-30 00:49:09,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42884990253411304 [2023-08-30 00:49:09,287 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1760 transitions. [2023-08-30 00:49:09,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1760 transitions. [2023-08-30 00:49:09,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:09,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1760 transitions. [2023-08-30 00:49:09,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.33333333333333) internal successors, (1760), 24 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:09,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:09,292 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:09,292 INFO L175 Difference]: Start difference. First operand has 188 places, 306 transitions, 5559 flow. Second operand 24 states and 1760 transitions. [2023-08-30 00:49:09,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 540 transitions, 9909 flow [2023-08-30 00:49:09,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 540 transitions, 9641 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-08-30 00:49:09,533 INFO L231 Difference]: Finished difference. Result has 211 places, 382 transitions, 7926 flow [2023-08-30 00:49:09,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7926, PETRI_PLACES=211, PETRI_TRANSITIONS=382} [2023-08-30 00:49:09,534 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-08-30 00:49:09,534 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 382 transitions, 7926 flow [2023-08-30 00:49:09,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.19047619047619) internal successors, (1453), 21 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:09,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:09,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:09,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:09,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:09,739 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:09,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1634372773, now seen corresponding path program 12 times [2023-08-30 00:49:09,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:09,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939455564] [2023-08-30 00:49:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:09,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939455564] [2023-08-30 00:49:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939455564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362587209] [2023-08-30 00:49:09,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:49:09,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:09,840 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:09,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 00:49:09,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:49:09,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:09,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:49:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:09,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:10,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362587209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:10,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:10,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-08-30 00:49:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521243482] [2023-08-30 00:49:10,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:10,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:49:10,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:49:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:49:10,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-30 00:49:10,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 382 transitions, 7926 flow. Second operand has 12 states, 12 states have (on average 78.58333333333333) internal successors, (943), 12 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:10,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:10,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-30 00:49:10,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:11,006 INFO L130 PetriNetUnfolder]: 1938/3896 cut-off events. [2023-08-30 00:49:11,006 INFO L131 PetriNetUnfolder]: For 273883/273892 co-relation queries the response was YES. [2023-08-30 00:49:11,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42427 conditions, 3896 events. 1938/3896 cut-off events. For 273883/273892 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29430 event pairs, 284 based on Foata normal form. 7/3898 useless extension candidates. Maximal degree in co-relation 42358. Up to 1434 conditions per place. [2023-08-30 00:49:11,042 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 318 selfloop transitions, 284 changer transitions 41/652 dead transitions. [2023-08-30 00:49:11,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 652 transitions, 14325 flow [2023-08-30 00:49:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:49:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:49:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 513 transitions. [2023-08-30 00:49:11,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 00:49:11,044 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 513 transitions. [2023-08-30 00:49:11,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 513 transitions. [2023-08-30 00:49:11,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:11,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 513 transitions. [2023-08-30 00:49:11,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:11,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:11,046 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:11,046 INFO L175 Difference]: Start difference. First operand has 211 places, 382 transitions, 7926 flow. Second operand 6 states and 513 transitions. [2023-08-30 00:49:11,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 652 transitions, 14325 flow [2023-08-30 00:49:11,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 652 transitions, 13556 flow, removed 350 selfloop flow, removed 9 redundant places. [2023-08-30 00:49:11,517 INFO L231 Difference]: Finished difference. Result has 211 places, 530 transitions, 11906 flow [2023-08-30 00:49:11,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11906, PETRI_PLACES=211, PETRI_TRANSITIONS=530} [2023-08-30 00:49:11,518 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-08-30 00:49:11,518 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 530 transitions, 11906 flow [2023-08-30 00:49:11,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 78.58333333333333) internal successors, (943), 12 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:11,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:11,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:11,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 00:49:11,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-30 00:49:11,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:11,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1102853091, now seen corresponding path program 13 times [2023-08-30 00:49:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:11,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847180144] [2023-08-30 00:49:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:11,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847180144] [2023-08-30 00:49:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847180144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:11,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948277677] [2023-08-30 00:49:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:49:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:11,826 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:11,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 00:49:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:49:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:11,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:12,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948277677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:12,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:12,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 00:49:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956107538] [2023-08-30 00:49:12,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:12,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:49:12,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:49:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:49:12,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:12,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 530 transitions, 11906 flow. Second operand has 21 states, 21 states have (on average 69.04761904761905) internal successors, (1450), 21 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:12,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:12,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:13,944 INFO L130 PetriNetUnfolder]: 2318/4786 cut-off events. [2023-08-30 00:49:13,944 INFO L131 PetriNetUnfolder]: For 423533/423533 co-relation queries the response was YES. [2023-08-30 00:49:13,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53290 conditions, 4786 events. 2318/4786 cut-off events. For 423533/423533 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38363 event pairs, 141 based on Foata normal form. 178/4964 useless extension candidates. Maximal degree in co-relation 53220. Up to 1295 conditions per place. [2023-08-30 00:49:13,983 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 206 selfloop transitions, 576 changer transitions 28/810 dead transitions. [2023-08-30 00:49:13,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 810 transitions, 18389 flow [2023-08-30 00:49:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 00:49:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 00:49:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2413 transitions. [2023-08-30 00:49:13,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-08-30 00:49:13,986 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2413 transitions. [2023-08-30 00:49:13,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2413 transitions. [2023-08-30 00:49:13,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:13,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2413 transitions. [2023-08-30 00:49:13,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 73.12121212121212) internal successors, (2413), 33 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:13,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:13,993 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:13,993 INFO L175 Difference]: Start difference. First operand has 211 places, 530 transitions, 11906 flow. Second operand 33 states and 2413 transitions. [2023-08-30 00:49:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 810 transitions, 18389 flow [2023-08-30 00:49:14,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 810 transitions, 18089 flow, removed 144 selfloop flow, removed 1 redundant places. [2023-08-30 00:49:14,716 INFO L231 Difference]: Finished difference. Result has 251 places, 644 transitions, 16311 flow [2023-08-30 00:49:14,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=11708, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16311, PETRI_PLACES=251, PETRI_TRANSITIONS=644} [2023-08-30 00:49:14,716 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 222 predicate places. [2023-08-30 00:49:14,716 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 644 transitions, 16311 flow [2023-08-30 00:49:14,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.04761904761905) internal successors, (1450), 21 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:14,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:14,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:14,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 00:49:14,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:14,921 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:14,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash -59131429, now seen corresponding path program 14 times [2023-08-30 00:49:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:14,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822872857] [2023-08-30 00:49:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:15,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822872857] [2023-08-30 00:49:15,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822872857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766380837] [2023-08-30 00:49:15,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:49:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:15,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 00:49:15,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:49:15,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:15,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:49:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766380837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:15,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:15,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-30 00:49:15,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010668877] [2023-08-30 00:49:15,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:15,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 00:49:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 00:49:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-08-30 00:49:15,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:15,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 644 transitions, 16311 flow. Second operand has 21 states, 21 states have (on average 68.95238095238095) internal successors, (1448), 21 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:15,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:15,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:15,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:17,407 INFO L130 PetriNetUnfolder]: 2238/4514 cut-off events. [2023-08-30 00:49:17,407 INFO L131 PetriNetUnfolder]: For 436487/436487 co-relation queries the response was YES. [2023-08-30 00:49:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55618 conditions, 4514 events. 2238/4514 cut-off events. For 436487/436487 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35004 event pairs, 48 based on Foata normal form. 50/4564 useless extension candidates. Maximal degree in co-relation 55539. Up to 1227 conditions per place. [2023-08-30 00:49:17,447 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 149 selfloop transitions, 594 changer transitions 32/775 dead transitions. [2023-08-30 00:49:17,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 775 transitions, 19717 flow [2023-08-30 00:49:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 00:49:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 00:49:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2527 transitions. [2023-08-30 00:49:17,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-08-30 00:49:17,449 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2527 transitions. [2023-08-30 00:49:17,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2527 transitions. [2023-08-30 00:49:17,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:17,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2527 transitions. [2023-08-30 00:49:17,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 72.2) internal successors, (2527), 35 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:17,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:17,457 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:17,457 INFO L175 Difference]: Start difference. First operand has 251 places, 644 transitions, 16311 flow. Second operand 35 states and 2527 transitions. [2023-08-30 00:49:17,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 775 transitions, 19717 flow [2023-08-30 00:49:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 775 transitions, 19004 flow, removed 274 selfloop flow, removed 16 redundant places. [2023-08-30 00:49:18,569 INFO L231 Difference]: Finished difference. Result has 272 places, 649 transitions, 17165 flow [2023-08-30 00:49:18,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=15164, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17165, PETRI_PLACES=272, PETRI_TRANSITIONS=649} [2023-08-30 00:49:18,569 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 243 predicate places. [2023-08-30 00:49:18,569 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 649 transitions, 17165 flow [2023-08-30 00:49:18,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.95238095238095) internal successors, (1448), 21 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:18,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:18,570 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:18,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:18,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:18,774 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:18,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash 146428741, now seen corresponding path program 15 times [2023-08-30 00:49:18,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:18,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106219915] [2023-08-30 00:49:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:18,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106219915] [2023-08-30 00:49:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106219915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239746413] [2023-08-30 00:49:18,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:49:18,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:18,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:18,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 00:49:18,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:49:18,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 00:49:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239746413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:19,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:19,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 00:49:19,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369302058] [2023-08-30 00:49:19,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:19,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:49:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:49:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:49:19,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:19,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 649 transitions, 17165 flow. Second operand has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:19,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:19,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:21,183 INFO L130 PetriNetUnfolder]: 2558/5151 cut-off events. [2023-08-30 00:49:21,183 INFO L131 PetriNetUnfolder]: For 523784/523784 co-relation queries the response was YES. [2023-08-30 00:49:21,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63644 conditions, 5151 events. 2558/5151 cut-off events. For 523784/523784 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40995 event pairs, 0 based on Foata normal form. 78/5229 useless extension candidates. Maximal degree in co-relation 63564. Up to 2052 conditions per place. [2023-08-30 00:49:21,231 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 510 selfloop transitions, 421 changer transitions 9/940 dead transitions. [2023-08-30 00:49:21,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 940 transitions, 24645 flow [2023-08-30 00:49:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 00:49:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 00:49:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2387 transitions. [2023-08-30 00:49:21,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42300194931773877 [2023-08-30 00:49:21,307 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2387 transitions. [2023-08-30 00:49:21,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2387 transitions. [2023-08-30 00:49:21,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:21,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2387 transitions. [2023-08-30 00:49:21,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.33333333333333) internal successors, (2387), 33 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:21,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:21,314 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:21,314 INFO L175 Difference]: Start difference. First operand has 272 places, 649 transitions, 17165 flow. Second operand 33 states and 2387 transitions. [2023-08-30 00:49:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 940 transitions, 24645 flow [2023-08-30 00:49:22,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 940 transitions, 23522 flow, removed 371 selfloop flow, removed 11 redundant places. [2023-08-30 00:49:22,551 INFO L231 Difference]: Finished difference. Result has 299 places, 794 transitions, 21345 flow [2023-08-30 00:49:22,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=16336, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21345, PETRI_PLACES=299, PETRI_TRANSITIONS=794} [2023-08-30 00:49:22,552 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 270 predicate places. [2023-08-30 00:49:22,553 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 794 transitions, 21345 flow [2023-08-30 00:49:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:22,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:22,553 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:22,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 00:49:22,757 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:22,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2135138407, now seen corresponding path program 16 times [2023-08-30 00:49:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89901463] [2023-08-30 00:49:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89901463] [2023-08-30 00:49:22,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89901463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603142765] [2023-08-30 00:49:22,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:49:22,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:22,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:22,853 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:22,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 00:49:22,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:49:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:22,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 00:49:22,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 00:49:23,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603142765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:23,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:23,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-08-30 00:49:23,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084549068] [2023-08-30 00:49:23,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:23,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:49:23,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:49:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:49:23,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:23,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 794 transitions, 21345 flow. Second operand has 20 states, 20 states have (on average 69.1) internal successors, (1382), 20 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:23,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:23,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:23,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:25,027 INFO L130 PetriNetUnfolder]: 2658/5331 cut-off events. [2023-08-30 00:49:25,027 INFO L131 PetriNetUnfolder]: For 530940/530940 co-relation queries the response was YES. [2023-08-30 00:49:25,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67399 conditions, 5331 events. 2658/5331 cut-off events. For 530940/530940 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 42573 event pairs, 185 based on Foata normal form. 40/5371 useless extension candidates. Maximal degree in co-relation 67311. Up to 4076 conditions per place. [2023-08-30 00:49:25,078 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 659 selfloop transitions, 256 changer transitions 5/920 dead transitions. [2023-08-30 00:49:25,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 920 transitions, 25396 flow [2023-08-30 00:49:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 00:49:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 00:49:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1592 transitions. [2023-08-30 00:49:25,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317916002126527 [2023-08-30 00:49:25,080 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1592 transitions. [2023-08-30 00:49:25,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1592 transitions. [2023-08-30 00:49:25,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:25,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1592 transitions. [2023-08-30 00:49:25,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.36363636363636) internal successors, (1592), 22 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:25,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:25,085 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:25,085 INFO L175 Difference]: Start difference. First operand has 299 places, 794 transitions, 21345 flow. Second operand 22 states and 1592 transitions. [2023-08-30 00:49:25,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 920 transitions, 25396 flow [2023-08-30 00:49:27,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 920 transitions, 24473 flow, removed 375 selfloop flow, removed 14 redundant places. [2023-08-30 00:49:27,356 INFO L231 Difference]: Finished difference. Result has 311 places, 834 transitions, 22403 flow [2023-08-30 00:49:27,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=20446, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22403, PETRI_PLACES=311, PETRI_TRANSITIONS=834} [2023-08-30 00:49:27,356 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2023-08-30 00:49:27,357 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 834 transitions, 22403 flow [2023-08-30 00:49:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.1) internal successors, (1382), 20 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:27,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:27,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:27,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 00:49:27,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:27,557 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:27,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash 175668191, now seen corresponding path program 17 times [2023-08-30 00:49:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:27,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869903120] [2023-08-30 00:49:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:27,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869903120] [2023-08-30 00:49:27,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869903120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:27,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543446603] [2023-08-30 00:49:27,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:49:27,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:27,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:27,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 00:49:27,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 00:49:27,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:27,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:49:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:27,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:27,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543446603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:27,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:27,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-30 00:49:27,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115555404] [2023-08-30 00:49:27,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:27,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 00:49:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 00:49:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-30 00:49:28,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:28,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 834 transitions, 22403 flow. Second operand has 23 states, 23 states have (on average 68.95652173913044) internal successors, (1586), 23 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:28,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:28,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:28,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:30,529 INFO L130 PetriNetUnfolder]: 3344/6665 cut-off events. [2023-08-30 00:49:30,529 INFO L131 PetriNetUnfolder]: For 440084/440084 co-relation queries the response was YES. [2023-08-30 00:49:30,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76744 conditions, 6665 events. 3344/6665 cut-off events. For 440084/440084 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 54862 event pairs, 115 based on Foata normal form. 168/6833 useless extension candidates. Maximal degree in co-relation 76655. Up to 2171 conditions per place. [2023-08-30 00:49:30,587 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 341 selfloop transitions, 816 changer transitions 16/1173 dead transitions. [2023-08-30 00:49:30,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1173 transitions, 32454 flow [2023-08-30 00:49:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 00:49:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 00:49:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2246 transitions. [2023-08-30 00:49:30,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42369364270892285 [2023-08-30 00:49:30,589 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2246 transitions. [2023-08-30 00:49:30,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2246 transitions. [2023-08-30 00:49:30,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:30,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2246 transitions. [2023-08-30 00:49:30,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 72.45161290322581) internal successors, (2246), 31 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:30,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 171.0) internal successors, (5472), 32 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:30,594 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 171.0) internal successors, (5472), 32 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:30,594 INFO L175 Difference]: Start difference. First operand has 311 places, 834 transitions, 22403 flow. Second operand 31 states and 2246 transitions. [2023-08-30 00:49:30,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1173 transitions, 32454 flow [2023-08-30 00:49:32,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1173 transitions, 32210 flow, removed 54 selfloop flow, removed 10 redundant places. [2023-08-30 00:49:32,146 INFO L231 Difference]: Finished difference. Result has 340 places, 1043 transitions, 30535 flow [2023-08-30 00:49:32,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=22162, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30535, PETRI_PLACES=340, PETRI_TRANSITIONS=1043} [2023-08-30 00:49:32,147 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 311 predicate places. [2023-08-30 00:49:32,147 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1043 transitions, 30535 flow [2023-08-30 00:49:32,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.95652173913044) internal successors, (1586), 23 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:32,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:32,147 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:32,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-30 00:49:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:32,348 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:32,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:32,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1116808075, now seen corresponding path program 18 times [2023-08-30 00:49:32,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:32,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178832305] [2023-08-30 00:49:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:32,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:32,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178832305] [2023-08-30 00:49:32,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178832305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237727420] [2023-08-30 00:49:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:49:32,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:32,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:32,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 00:49:32,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:49:32,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:32,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 00:49:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:32,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237727420] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:32,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-30 00:49:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817388469] [2023-08-30 00:49:32,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:32,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:49:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:49:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:49:32,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:32,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1043 transitions, 30535 flow. Second operand has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:32,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:32,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:32,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:35,605 INFO L130 PetriNetUnfolder]: 3581/7151 cut-off events. [2023-08-30 00:49:35,605 INFO L131 PetriNetUnfolder]: For 589481/589481 co-relation queries the response was YES. [2023-08-30 00:49:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86763 conditions, 7151 events. 3581/7151 cut-off events. For 589481/589481 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 59631 event pairs, 289 based on Foata normal form. 264/7415 useless extension candidates. Maximal degree in co-relation 86667. Up to 5620 conditions per place. [2023-08-30 00:49:35,681 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 980 selfloop transitions, 249 changer transitions 29/1258 dead transitions. [2023-08-30 00:49:35,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1258 transitions, 37571 flow [2023-08-30 00:49:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 00:49:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 00:49:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2041 transitions. [2023-08-30 00:49:35,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262740183792815 [2023-08-30 00:49:35,683 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2041 transitions. [2023-08-30 00:49:35,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2041 transitions. [2023-08-30 00:49:35,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:35,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2041 transitions. [2023-08-30 00:49:35,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 72.89285714285714) internal successors, (2041), 28 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:35,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:35,688 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:35,689 INFO L175 Difference]: Start difference. First operand has 340 places, 1043 transitions, 30535 flow. Second operand 28 states and 2041 transitions. [2023-08-30 00:49:35,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1258 transitions, 37571 flow [2023-08-30 00:49:37,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1258 transitions, 36901 flow, removed 283 selfloop flow, removed 14 redundant places. [2023-08-30 00:49:38,002 INFO L231 Difference]: Finished difference. Result has 363 places, 1125 transitions, 33378 flow [2023-08-30 00:49:38,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=29889, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=33378, PETRI_PLACES=363, PETRI_TRANSITIONS=1125} [2023-08-30 00:49:38,003 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 334 predicate places. [2023-08-30 00:49:38,003 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1125 transitions, 33378 flow [2023-08-30 00:49:38,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:38,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:38,004 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:38,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:38,208 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:38,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -592511761, now seen corresponding path program 19 times [2023-08-30 00:49:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750310098] [2023-08-30 00:49:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750310098] [2023-08-30 00:49:38,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750310098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:38,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021797032] [2023-08-30 00:49:38,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:49:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:38,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:38,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 00:49:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:49:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:38,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021797032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:38,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-30 00:49:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824507893] [2023-08-30 00:49:38,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:38,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 00:49:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 00:49:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-30 00:49:38,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:38,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1125 transitions, 33378 flow. Second operand has 22 states, 22 states have (on average 68.9090909090909) internal successors, (1516), 22 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:38,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:38,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:41,842 INFO L130 PetriNetUnfolder]: 3792/7583 cut-off events. [2023-08-30 00:49:41,842 INFO L131 PetriNetUnfolder]: For 653853/653853 co-relation queries the response was YES. [2023-08-30 00:49:42,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97901 conditions, 7583 events. 3792/7583 cut-off events. For 653853/653853 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 63808 event pairs, 97 based on Foata normal form. 38/7621 useless extension candidates. Maximal degree in co-relation 97795. Up to 2075 conditions per place. [2023-08-30 00:49:42,058 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 709 selfloop transitions, 594 changer transitions 9/1312 dead transitions. [2023-08-30 00:49:42,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1312 transitions, 40624 flow [2023-08-30 00:49:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 00:49:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 00:49:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2375 transitions. [2023-08-30 00:49:42,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2023-08-30 00:49:42,061 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2375 transitions. [2023-08-30 00:49:42,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2375 transitions. [2023-08-30 00:49:42,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:42,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2375 transitions. [2023-08-30 00:49:42,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 71.96969696969697) internal successors, (2375), 33 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:42,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:42,066 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:42,066 INFO L175 Difference]: Start difference. First operand has 363 places, 1125 transitions, 33378 flow. Second operand 33 states and 2375 transitions. [2023-08-30 00:49:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1312 transitions, 40624 flow [2023-08-30 00:49:45,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1312 transitions, 39806 flow, removed 364 selfloop flow, removed 12 redundant places. [2023-08-30 00:49:45,172 INFO L231 Difference]: Finished difference. Result has 394 places, 1216 transitions, 38119 flow [2023-08-30 00:49:45,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=32461, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38119, PETRI_PLACES=394, PETRI_TRANSITIONS=1216} [2023-08-30 00:49:45,173 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 365 predicate places. [2023-08-30 00:49:45,174 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1216 transitions, 38119 flow [2023-08-30 00:49:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.9090909090909) internal successors, (1516), 22 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:45,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:45,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:45,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:45,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 00:49:45,379 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:45,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1622501659, now seen corresponding path program 20 times [2023-08-30 00:49:45,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:45,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987787448] [2023-08-30 00:49:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:45,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:45,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:45,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987787448] [2023-08-30 00:49:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987787448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:45,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421175340] [2023-08-30 00:49:45,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:49:45,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:45,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:45,496 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:45,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 00:49:45,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:49:45,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:49:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:45,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421175340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:46,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-30 00:49:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016383110] [2023-08-30 00:49:46,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:46,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:49:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:49:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:49:46,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:46,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1216 transitions, 38119 flow. Second operand has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:46,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:46,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:46,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:50,469 INFO L130 PetriNetUnfolder]: 4227/8543 cut-off events. [2023-08-30 00:49:50,469 INFO L131 PetriNetUnfolder]: For 975015/975015 co-relation queries the response was YES. [2023-08-30 00:49:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116999 conditions, 8543 events. 4227/8543 cut-off events. For 975015/975015 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 73778 event pairs, 195 based on Foata normal form. 140/8683 useless extension candidates. Maximal degree in co-relation 116883. Up to 2052 conditions per place. [2023-08-30 00:49:50,559 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 597 selfloop transitions, 935 changer transitions 76/1608 dead transitions. [2023-08-30 00:49:50,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1608 transitions, 51832 flow [2023-08-30 00:49:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 00:49:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 00:49:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2730 transitions. [2023-08-30 00:49:50,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431484115694642 [2023-08-30 00:49:50,561 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2730 transitions. [2023-08-30 00:49:50,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2730 transitions. [2023-08-30 00:49:50,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:50,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2730 transitions. [2023-08-30 00:49:50,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.78378378378379) internal successors, (2730), 37 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:50,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:50,567 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:50,567 INFO L175 Difference]: Start difference. First operand has 394 places, 1216 transitions, 38119 flow. Second operand 37 states and 2730 transitions. [2023-08-30 00:49:50,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1608 transitions, 51832 flow [2023-08-30 00:49:55,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1608 transitions, 49532 flow, removed 1086 selfloop flow, removed 12 redundant places. [2023-08-30 00:49:56,013 INFO L231 Difference]: Finished difference. Result has 437 places, 1335 transitions, 44602 flow [2023-08-30 00:49:56,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=36806, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=821, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=44602, PETRI_PLACES=437, PETRI_TRANSITIONS=1335} [2023-08-30 00:49:56,014 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 408 predicate places. [2023-08-30 00:49:56,014 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1335 transitions, 44602 flow [2023-08-30 00:49:56,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:56,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:56,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:49:56,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 00:49:56,218 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:49:56,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -140687941, now seen corresponding path program 21 times [2023-08-30 00:49:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:56,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065742997] [2023-08-30 00:49:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:56,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065742997] [2023-08-30 00:49:56,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065742997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674191395] [2023-08-30 00:49:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:49:56,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:56,363 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:56,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 00:49:56,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 00:49:56,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 00:49:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:56,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674191395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:56,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-30 00:49:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547242752] [2023-08-30 00:49:56,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:49:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:49:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:49:56,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:49:56,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1335 transitions, 44602 flow. Second operand has 26 states, 26 states have (on average 68.8076923076923) internal successors, (1789), 26 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:56,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:56,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:49:56,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:02,523 INFO L130 PetriNetUnfolder]: 5038/10178 cut-off events. [2023-08-30 00:50:02,523 INFO L131 PetriNetUnfolder]: For 1267455/1267455 co-relation queries the response was YES. [2023-08-30 00:50:02,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142979 conditions, 10178 events. 5038/10178 cut-off events. For 1267455/1267455 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 90629 event pairs, 299 based on Foata normal form. 276/10454 useless extension candidates. Maximal degree in co-relation 142844. Up to 3548 conditions per place. [2023-08-30 00:50:02,639 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 719 selfloop transitions, 1042 changer transitions 56/1817 dead transitions. [2023-08-30 00:50:02,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1817 transitions, 62042 flow [2023-08-30 00:50:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 00:50:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 00:50:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2689 transitions. [2023-08-30 00:50:02,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250039513197408 [2023-08-30 00:50:02,641 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2689 transitions. [2023-08-30 00:50:02,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2689 transitions. [2023-08-30 00:50:02,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:02,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2689 transitions. [2023-08-30 00:50:02,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 72.67567567567568) internal successors, (2689), 37 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:02,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:02,647 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:02,647 INFO L175 Difference]: Start difference. First operand has 437 places, 1335 transitions, 44602 flow. Second operand 37 states and 2689 transitions. [2023-08-30 00:50:02,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1817 transitions, 62042 flow [2023-08-30 00:50:10,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1817 transitions, 59615 flow, removed 658 selfloop flow, removed 12 redundant places. [2023-08-30 00:50:10,064 INFO L231 Difference]: Finished difference. Result has 471 places, 1587 transitions, 54764 flow [2023-08-30 00:50:10,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42796, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=54764, PETRI_PLACES=471, PETRI_TRANSITIONS=1587} [2023-08-30 00:50:10,065 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 442 predicate places. [2023-08-30 00:50:10,066 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1587 transitions, 54764 flow [2023-08-30 00:50:10,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.8076923076923) internal successors, (1789), 26 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:10,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:10,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:10,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:10,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 00:50:10,268 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:10,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1138747277, now seen corresponding path program 22 times [2023-08-30 00:50:10,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:10,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116968261] [2023-08-30 00:50:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:10,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:10,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116968261] [2023-08-30 00:50:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116968261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:10,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932146708] [2023-08-30 00:50:10,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:50:10,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:10,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:10,369 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:10,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 00:50:10,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:50:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 00:50:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:10,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:10,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932146708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:10,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:10,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-30 00:50:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723176211] [2023-08-30 00:50:10,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:10,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 00:50:10,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 00:50:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-08-30 00:50:10,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:50:10,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1587 transitions, 54764 flow. Second operand has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:10,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:10,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:50:10,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:17,533 INFO L130 PetriNetUnfolder]: 5553/11278 cut-off events. [2023-08-30 00:50:17,533 INFO L131 PetriNetUnfolder]: For 1544536/1544536 co-relation queries the response was YES. [2023-08-30 00:50:17,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161095 conditions, 11278 events. 5553/11278 cut-off events. For 1544536/1544536 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 102166 event pairs, 529 based on Foata normal form. 336/11614 useless extension candidates. Maximal degree in co-relation 160951. Up to 8254 conditions per place. [2023-08-30 00:50:17,673 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 1391 selfloop transitions, 484 changer transitions 21/1896 dead transitions. [2023-08-30 00:50:17,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1896 transitions, 67630 flow [2023-08-30 00:50:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 00:50:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 00:50:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1748 transitions. [2023-08-30 00:50:17,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-08-30 00:50:17,675 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1748 transitions. [2023-08-30 00:50:17,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1748 transitions. [2023-08-30 00:50:17,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:17,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1748 transitions. [2023-08-30 00:50:17,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 72.83333333333333) internal successors, (1748), 24 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:17,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:17,679 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:17,679 INFO L175 Difference]: Start difference. First operand has 471 places, 1587 transitions, 54764 flow. Second operand 24 states and 1748 transitions. [2023-08-30 00:50:17,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1896 transitions, 67630 flow [2023-08-30 00:50:28,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1896 transitions, 66833 flow, removed 335 selfloop flow, removed 14 redundant places. [2023-08-30 00:50:28,679 INFO L231 Difference]: Finished difference. Result has 490 places, 1773 transitions, 62551 flow [2023-08-30 00:50:28,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=53900, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=62551, PETRI_PLACES=490, PETRI_TRANSITIONS=1773} [2023-08-30 00:50:28,680 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 461 predicate places. [2023-08-30 00:50:28,681 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1773 transitions, 62551 flow [2023-08-30 00:50:28,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:28,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:28,681 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:28,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:28,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:28,885 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:28,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 188047156, now seen corresponding path program 23 times [2023-08-30 00:50:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:28,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086639635] [2023-08-30 00:50:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:28,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086639635] [2023-08-30 00:50:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086639635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702605991] [2023-08-30 00:50:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:50:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:29,021 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:29,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 00:50:29,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:50:29,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:50:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:29,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702605991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:29,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:29,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-30 00:50:29,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666846616] [2023-08-30 00:50:29,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:29,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 00:50:29,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 00:50:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-08-30 00:50:29,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:50:29,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1773 transitions, 62551 flow. Second operand has 26 states, 26 states have (on average 68.92307692307692) internal successors, (1792), 26 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:29,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:29,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:50:29,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:50:39,252 INFO L130 PetriNetUnfolder]: 6742/13746 cut-off events. [2023-08-30 00:50:39,252 INFO L131 PetriNetUnfolder]: For 1789014/1789014 co-relation queries the response was YES. [2023-08-30 00:50:39,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203140 conditions, 13746 events. 6742/13746 cut-off events. For 1789014/1789014 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 128610 event pairs, 11 based on Foata normal form. 54/13800 useless extension candidates. Maximal degree in co-relation 202987. Up to 2783 conditions per place. [2023-08-30 00:50:39,423 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 532 selfloop transitions, 1959 changer transitions 143/2634 dead transitions. [2023-08-30 00:50:39,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2634 transitions, 90594 flow [2023-08-30 00:50:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 00:50:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 00:50:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4084 transitions. [2023-08-30 00:50:39,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264828738512949 [2023-08-30 00:50:39,426 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4084 transitions. [2023-08-30 00:50:39,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4084 transitions. [2023-08-30 00:50:39,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:50:39,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4084 transitions. [2023-08-30 00:50:39,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 72.92857142857143) internal successors, (4084), 56 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:39,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 171.0) internal successors, (9747), 57 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:39,435 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 171.0) internal successors, (9747), 57 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:39,435 INFO L175 Difference]: Start difference. First operand has 490 places, 1773 transitions, 62551 flow. Second operand 56 states and 4084 transitions. [2023-08-30 00:50:39,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 2634 transitions, 90594 flow [2023-08-30 00:50:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2634 transitions, 89834 flow, removed 351 selfloop flow, removed 9 redundant places. [2023-08-30 00:50:54,693 INFO L231 Difference]: Finished difference. Result has 546 places, 2146 transitions, 82271 flow [2023-08-30 00:50:54,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=61920, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=82271, PETRI_PLACES=546, PETRI_TRANSITIONS=2146} [2023-08-30 00:50:54,694 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 517 predicate places. [2023-08-30 00:50:54,695 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 2146 transitions, 82271 flow [2023-08-30 00:50:54,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.92307692307692) internal successors, (1792), 26 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:54,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:50:54,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:50:54,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 00:50:54,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:54,899 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:50:54,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:50:54,900 INFO L85 PathProgramCache]: Analyzing trace with hash 509811766, now seen corresponding path program 24 times [2023-08-30 00:50:54,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:50:54,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186447283] [2023-08-30 00:50:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:50:54,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:50:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:50:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:54,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:50:54,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186447283] [2023-08-30 00:50:54,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186447283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:50:54,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723678648] [2023-08-30 00:50:54,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:50:54,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:50:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:50:54,998 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:50:54,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 00:50:55,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:50:55,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:50:55,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 00:50:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:50:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:55,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:50:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:50:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723678648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:50:55,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:50:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 12 [2023-08-30 00:50:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566375639] [2023-08-30 00:50:55,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:50:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 00:50:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:50:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 00:50:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-08-30 00:50:55,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-08-30 00:50:55,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 2146 transitions, 82271 flow. Second operand has 14 states, 14 states have (on average 73.85714285714286) internal successors, (1034), 14 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:50:55,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:50:55,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-08-30 00:50:55,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:51:09,220 INFO L130 PetriNetUnfolder]: 9240/18698 cut-off events. [2023-08-30 00:51:09,220 INFO L131 PetriNetUnfolder]: For 2377307/2377307 co-relation queries the response was YES. [2023-08-30 00:51:09,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288147 conditions, 18698 events. 9240/18698 cut-off events. For 2377307/2377307 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 181618 event pairs, 614 based on Foata normal form. 2/18697 useless extension candidates. Maximal degree in co-relation 287983. Up to 6914 conditions per place. [2023-08-30 00:51:09,646 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 1434 selfloop transitions, 1692 changer transitions 105/3234 dead transitions. [2023-08-30 00:51:09,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 3234 transitions, 125914 flow [2023-08-30 00:51:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 00:51:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 00:51:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 645 transitions. [2023-08-30 00:51:09,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47149122807017546 [2023-08-30 00:51:09,648 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 645 transitions. [2023-08-30 00:51:09,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 645 transitions. [2023-08-30 00:51:09,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:51:09,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 645 transitions. [2023-08-30 00:51:09,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.625) internal successors, (645), 8 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:09,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:09,649 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:09,649 INFO L175 Difference]: Start difference. First operand has 546 places, 2146 transitions, 82271 flow. Second operand 8 states and 645 transitions. [2023-08-30 00:51:09,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 3234 transitions, 125914 flow [2023-08-30 00:51:44,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 3234 transitions, 119678 flow, removed 2991 selfloop flow, removed 15 redundant places. [2023-08-30 00:51:44,099 INFO L231 Difference]: Finished difference. Result has 543 places, 2878 transitions, 113416 flow [2023-08-30 00:51:44,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=78387, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113416, PETRI_PLACES=543, PETRI_TRANSITIONS=2878} [2023-08-30 00:51:44,100 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 514 predicate places. [2023-08-30 00:51:44,101 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2878 transitions, 113416 flow [2023-08-30 00:51:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.85714285714286) internal successors, (1034), 14 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:44,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:44,101 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:51:44,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:44,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 00:51:44,303 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:51:44,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1833610942, now seen corresponding path program 25 times [2023-08-30 00:51:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:51:44,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427053055] [2023-08-30 00:51:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:51:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:44,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:51:44,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427053055] [2023-08-30 00:51:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427053055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:51:44,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374155472] [2023-08-30 00:51:44,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 00:51:44,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:44,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:51:44,453 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:51:44,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 00:51:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:51:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:44,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374155472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:44,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:51:44,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 00:51:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923654512] [2023-08-30 00:51:44,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 00:51:44,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:51:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 00:51:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-08-30 00:51:44,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:51:44,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2878 transitions, 113416 flow. Second operand has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:44,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:44,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:51:44,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:03,737 INFO L130 PetriNetUnfolder]: 9958/20158 cut-off events. [2023-08-30 00:52:03,737 INFO L131 PetriNetUnfolder]: For 1534322/1534322 co-relation queries the response was YES. [2023-08-30 00:52:03,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287433 conditions, 20158 events. 9958/20158 cut-off events. For 1534322/1534322 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 198048 event pairs, 245 based on Foata normal form. 104/20262 useless extension candidates. Maximal degree in co-relation 287268. Up to 6308 conditions per place. [2023-08-30 00:52:04,023 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 509 selfloop transitions, 2819 changer transitions 65/3393 dead transitions. [2023-08-30 00:52:04,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 3393 transitions, 134106 flow [2023-08-30 00:52:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 00:52:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 00:52:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2770 transitions. [2023-08-30 00:52:04,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262850107725454 [2023-08-30 00:52:04,025 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2770 transitions. [2023-08-30 00:52:04,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2770 transitions. [2023-08-30 00:52:04,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:04,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2770 transitions. [2023-08-30 00:52:04,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 72.89473684210526) internal successors, (2770), 38 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:04,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:04,031 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:04,031 INFO L175 Difference]: Start difference. First operand has 543 places, 2878 transitions, 113416 flow. Second operand 38 states and 2770 transitions. [2023-08-30 00:52:04,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 3393 transitions, 134106 flow [2023-08-30 00:52:35,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3393 transitions, 132983 flow, removed 534 selfloop flow, removed 4 redundant places. [2023-08-30 00:52:35,563 INFO L231 Difference]: Finished difference. Result has 587 places, 3127 transitions, 129886 flow [2023-08-30 00:52:35,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=112398, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=129886, PETRI_PLACES=587, PETRI_TRANSITIONS=3127} [2023-08-30 00:52:35,565 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 558 predicate places. [2023-08-30 00:52:35,565 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 3127 transitions, 129886 flow [2023-08-30 00:52:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:35,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:52:35,566 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:52:35,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 00:52:35,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 00:52:35,766 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:52:35,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:52:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1439251158, now seen corresponding path program 26 times [2023-08-30 00:52:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:52:35,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052911068] [2023-08-30 00:52:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:52:35,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:52:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:52:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:52:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052911068] [2023-08-30 00:52:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052911068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:52:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524715109] [2023-08-30 00:52:35,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:52:35,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:52:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:52:35,896 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:52:35,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 00:52:35,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:52:35,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:52:35,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:52:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:52:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:36,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:52:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:52:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524715109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:52:36,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:52:36,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 00:52:36,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516247959] [2023-08-30 00:52:36,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:52:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 00:52:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:52:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 00:52:36,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-08-30 00:52:36,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:52:36,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 3127 transitions, 129886 flow. Second operand has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:36,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:52:36,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:52:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:52:58,372 INFO L130 PetriNetUnfolder]: 10318/20836 cut-off events. [2023-08-30 00:52:58,372 INFO L131 PetriNetUnfolder]: For 1774133/1774133 co-relation queries the response was YES. [2023-08-30 00:52:58,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307647 conditions, 20836 events. 10318/20836 cut-off events. For 1774133/1774133 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 205597 event pairs, 245 based on Foata normal form. 140/20976 useless extension candidates. Maximal degree in co-relation 307472. Up to 5606 conditions per place. [2023-08-30 00:52:58,693 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 519 selfloop transitions, 2942 changer transitions 78/3539 dead transitions. [2023-08-30 00:52:58,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3539 transitions, 147554 flow [2023-08-30 00:52:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 00:52:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 00:52:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3058 transitions. [2023-08-30 00:52:58,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578668894458366 [2023-08-30 00:52:58,696 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3058 transitions. [2023-08-30 00:52:58,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3058 transitions. [2023-08-30 00:52:58,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:52:58,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3058 transitions. [2023-08-30 00:52:58,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.80952380952381) internal successors, (3058), 42 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:58,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:58,702 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:52:58,702 INFO L175 Difference]: Start difference. First operand has 587 places, 3127 transitions, 129886 flow. Second operand 42 states and 3058 transitions. [2023-08-30 00:52:58,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3539 transitions, 147554 flow [2023-08-30 00:53:34,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 3539 transitions, 146986 flow, removed 197 selfloop flow, removed 13 redundant places. [2023-08-30 00:53:34,291 INFO L231 Difference]: Finished difference. Result has 622 places, 3246 transitions, 140773 flow [2023-08-30 00:53:34,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=129346, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=140773, PETRI_PLACES=622, PETRI_TRANSITIONS=3246} [2023-08-30 00:53:34,293 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 593 predicate places. [2023-08-30 00:53:34,293 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 3246 transitions, 140773 flow [2023-08-30 00:53:34,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:34,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:53:34,294 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:53:34,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 00:53:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:53:34,494 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:53:34,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:53:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -858364034, now seen corresponding path program 27 times [2023-08-30 00:53:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:53:34,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913703853] [2023-08-30 00:53:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:53:34,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:53:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:53:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:53:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:53:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913703853] [2023-08-30 00:53:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913703853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:53:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739032731] [2023-08-30 00:53:34,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:53:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:53:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:53:34,612 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:53:34,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 00:53:34,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 00:53:34,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:53:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:53:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:53:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:53:34,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:53:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:53:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739032731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:53:34,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:53:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-30 00:53:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060621172] [2023-08-30 00:53:34,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:53:34,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 00:53:34,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:53:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 00:53:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-08-30 00:53:34,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:53:34,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 3246 transitions, 140773 flow. Second operand has 27 states, 27 states have (on average 68.74074074074075) internal successors, (1856), 27 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:53:34,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:53:34,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:53:34,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:54:03,405 INFO L130 PetriNetUnfolder]: 11707/23649 cut-off events. [2023-08-30 00:54:03,405 INFO L131 PetriNetUnfolder]: For 2117157/2117157 co-relation queries the response was YES. [2023-08-30 00:54:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360974 conditions, 23649 events. 11707/23649 cut-off events. For 2117157/2117157 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 237517 event pairs, 299 based on Foata normal form. 58/23707 useless extension candidates. Maximal degree in co-relation 360792. Up to 4804 conditions per place. [2023-08-30 00:54:03,896 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 401 selfloop transitions, 3627 changer transitions 145/4173 dead transitions. [2023-08-30 00:54:03,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 4173 transitions, 176425 flow [2023-08-30 00:54:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-08-30 00:54:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-08-30 00:54:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 8826 transitions. [2023-08-30 00:54:03,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41624221844934917 [2023-08-30 00:54:03,902 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 8826 transitions. [2023-08-30 00:54:03,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 8826 transitions. [2023-08-30 00:54:03,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:54:03,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 8826 transitions. [2023-08-30 00:54:03,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 71.1774193548387) internal successors, (8826), 124 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:03,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 171.0) internal successors, (21375), 125 states have internal predecessors, (21375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:03,919 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 171.0) internal successors, (21375), 125 states have internal predecessors, (21375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:03,919 INFO L175 Difference]: Start difference. First operand has 622 places, 3246 transitions, 140773 flow. Second operand 124 states and 8826 transitions. [2023-08-30 00:54:03,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 4173 transitions, 176425 flow [2023-08-30 00:54:52,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 4173 transitions, 175789 flow, removed 185 selfloop flow, removed 17 redundant places. [2023-08-30 00:54:52,644 INFO L231 Difference]: Finished difference. Result has 744 places, 3785 transitions, 172067 flow [2023-08-30 00:54:52,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=139798, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3080, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=172067, PETRI_PLACES=744, PETRI_TRANSITIONS=3785} [2023-08-30 00:54:52,647 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 715 predicate places. [2023-08-30 00:54:52,647 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 3785 transitions, 172067 flow [2023-08-30 00:54:52,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.74074074074075) internal successors, (1856), 27 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:52,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:54:52,647 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:54:52,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-30 00:54:52,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:54:52,848 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:54:52,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:54:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 574148990, now seen corresponding path program 28 times [2023-08-30 00:54:52,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:54:52,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959986632] [2023-08-30 00:54:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:54:52,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:54:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:54:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:54:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:54:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959986632] [2023-08-30 00:54:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959986632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:54:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383349844] [2023-08-30 00:54:52,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:54:52,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:54:52,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:54:52,986 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:54:52,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 00:54:53,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:54:53,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:54:53,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 00:54:53,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:54:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:54:53,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:54:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:54:53,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383349844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:54:53,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:54:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-30 00:54:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596071978] [2023-08-30 00:54:53,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:54:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 00:54:53,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:54:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 00:54:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-08-30 00:54:53,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:54:53,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 3785 transitions, 172067 flow. Second operand has 25 states, 25 states have (on average 68.84) internal successors, (1721), 25 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:53,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:54:53,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:54:53,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:55:24,939 INFO L130 PetriNetUnfolder]: 12599/24874 cut-off events. [2023-08-30 00:55:24,939 INFO L131 PetriNetUnfolder]: For 2538421/2538421 co-relation queries the response was YES. [2023-08-30 00:55:25,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405304 conditions, 24874 events. 12599/24874 cut-off events. For 2538421/2538421 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 246555 event pairs, 735 based on Foata normal form. 326/25200 useless extension candidates. Maximal degree in co-relation 405106. Up to 13784 conditions per place. [2023-08-30 00:55:25,377 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 2397 selfloop transitions, 1997 changer transitions 19/4413 dead transitions. [2023-08-30 00:55:25,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4413 transitions, 202831 flow [2023-08-30 00:55:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-30 00:55:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-30 00:55:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3540 transitions. [2023-08-30 00:55:25,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248478338703904 [2023-08-30 00:55:25,381 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3540 transitions. [2023-08-30 00:55:25,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3540 transitions. [2023-08-30 00:55:25,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:55:25,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3540 transitions. [2023-08-30 00:55:25,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 72.24489795918367) internal successors, (3540), 49 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:25,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:25,388 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:55:25,388 INFO L175 Difference]: Start difference. First operand has 744 places, 3785 transitions, 172067 flow. Second operand 49 states and 3540 transitions. [2023-08-30 00:55:25,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4413 transitions, 202831 flow [2023-08-30 00:56:28,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4413 transitions, 193395 flow, removed 1621 selfloop flow, removed 37 redundant places. [2023-08-30 00:56:28,899 INFO L231 Difference]: Finished difference. Result has 746 places, 4156 transitions, 186373 flow [2023-08-30 00:56:28,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=163436, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=186373, PETRI_PLACES=746, PETRI_TRANSITIONS=4156} [2023-08-30 00:56:28,903 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 717 predicate places. [2023-08-30 00:56:28,903 INFO L495 AbstractCegarLoop]: Abstraction has has 746 places, 4156 transitions, 186373 flow [2023-08-30 00:56:28,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 68.84) internal successors, (1721), 25 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:28,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:56:28,903 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:56:28,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 00:56:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:56:29,110 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:56:29,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:56:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash 552436930, now seen corresponding path program 29 times [2023-08-30 00:56:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:56:29,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918856907] [2023-08-30 00:56:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:56:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:56:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:56:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:29,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:56:29,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918856907] [2023-08-30 00:56:29,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918856907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:56:29,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230690726] [2023-08-30 00:56:29,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:56:29,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:56:29,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:56:29,233 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:56:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 00:56:29,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 00:56:29,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:56:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:56:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:56:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:29,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:56:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:56:29,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230690726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:56:29,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:56:29,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-30 00:56:29,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709601080] [2023-08-30 00:56:29,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:56:29,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 00:56:29,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:56:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 00:56:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-08-30 00:56:29,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:56:29,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 4156 transitions, 186373 flow. Second operand has 28 states, 28 states have (on average 68.92857142857143) internal successors, (1930), 28 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:56:29,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:56:29,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:56:29,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:57:07,085 INFO L130 PetriNetUnfolder]: 13394/26381 cut-off events. [2023-08-30 00:57:07,085 INFO L131 PetriNetUnfolder]: For 2604260/2604260 co-relation queries the response was YES. [2023-08-30 00:57:07,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424189 conditions, 26381 events. 13394/26381 cut-off events. For 2604260/2604260 co-relation queries the response was YES. Maximal size of possible extension queue 2082. Compared 263526 event pairs, 269 based on Foata normal form. 162/26543 useless extension candidates. Maximal degree in co-relation 423988. Up to 7465 conditions per place. [2023-08-30 00:57:07,742 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 881 selfloop transitions, 3756 changer transitions 24/4661 dead transitions. [2023-08-30 00:57:07,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 4661 transitions, 213478 flow [2023-08-30 00:57:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 00:57:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 00:57:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2974 transitions. [2023-08-30 00:57:07,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42419055769505065 [2023-08-30 00:57:07,745 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2974 transitions. [2023-08-30 00:57:07,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2974 transitions. [2023-08-30 00:57:07,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:57:07,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2974 transitions. [2023-08-30 00:57:07,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.53658536585365) internal successors, (2974), 41 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,751 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:57:07,751 INFO L175 Difference]: Start difference. First operand has 746 places, 4156 transitions, 186373 flow. Second operand 41 states and 2974 transitions. [2023-08-30 00:57:07,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 4661 transitions, 213478 flow [2023-08-30 00:58:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 4661 transitions, 212095 flow, removed 242 selfloop flow, removed 33 redundant places. [2023-08-30 00:58:18,729 INFO L231 Difference]: Finished difference. Result has 764 places, 4445 transitions, 209446 flow [2023-08-30 00:58:18,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=185036, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=209446, PETRI_PLACES=764, PETRI_TRANSITIONS=4445} [2023-08-30 00:58:18,732 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 735 predicate places. [2023-08-30 00:58:18,732 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 4445 transitions, 209446 flow [2023-08-30 00:58:18,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 68.92857142857143) internal successors, (1930), 28 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:18,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:58:18,733 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:58:18,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 00:58:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 00:58:18,938 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 00:58:18,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:58:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2129741782, now seen corresponding path program 30 times [2023-08-30 00:58:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:58:18,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211673949] [2023-08-30 00:58:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:58:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:58:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:58:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:58:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:58:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211673949] [2023-08-30 00:58:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211673949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:58:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846264093] [2023-08-30 00:58:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 00:58:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:58:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:58:19,057 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:58:19,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 00:58:19,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 00:58:19,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:58:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:58:19,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:58:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:58:19,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:58:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:58:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846264093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:58:19,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:58:19,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 00:58:19,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431233037] [2023-08-30 00:58:19,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:58:19,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 00:58:19,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:58:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 00:58:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-08-30 00:58:19,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 00:58:19,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 4445 transitions, 209446 flow. Second operand has 29 states, 29 states have (on average 68.89655172413794) internal successors, (1998), 29 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:58:19,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:58:19,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 00:58:19,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:59:06,583 INFO L130 PetriNetUnfolder]: 16029/31401 cut-off events. [2023-08-30 00:59:06,583 INFO L131 PetriNetUnfolder]: For 3615009/3615009 co-relation queries the response was YES. [2023-08-30 00:59:07,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525037 conditions, 31401 events. 16029/31401 cut-off events. For 3615009/3615009 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 320211 event pairs, 311 based on Foata normal form. 496/31897 useless extension candidates. Maximal degree in co-relation 524827. Up to 10211 conditions per place. [2023-08-30 00:59:07,400 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 1463 selfloop transitions, 4078 changer transitions 80/5621 dead transitions. [2023-08-30 00:59:07,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 5621 transitions, 269411 flow [2023-08-30 00:59:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 00:59:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 00:59:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3119 transitions. [2023-08-30 00:59:07,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42418060655514755 [2023-08-30 00:59:07,402 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3119 transitions. [2023-08-30 00:59:07,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3119 transitions. [2023-08-30 00:59:07,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:59:07,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3119 transitions. [2023-08-30 00:59:07,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 72.53488372093024) internal successors, (3119), 43 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:07,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 171.0) internal successors, (7524), 44 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:07,408 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 171.0) internal successors, (7524), 44 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:59:07,408 INFO L175 Difference]: Start difference. First operand has 764 places, 4445 transitions, 209446 flow. Second operand 43 states and 3119 transitions. [2023-08-30 00:59:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 5621 transitions, 269411 flow [2023-08-30 01:00:46,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 5621 transitions, 268754 flow, removed 258 selfloop flow, removed 14 redundant places. [2023-08-30 01:00:46,600 INFO L231 Difference]: Finished difference. Result has 806 places, 5316 transitions, 262351 flow [2023-08-30 01:00:46,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208883, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=262351, PETRI_PLACES=806, PETRI_TRANSITIONS=5316} [2023-08-30 01:00:46,603 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 777 predicate places. [2023-08-30 01:00:46,603 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 5316 transitions, 262351 flow [2023-08-30 01:00:46,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 68.89655172413794) internal successors, (1998), 29 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:46,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:00:46,604 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:00:46,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 01:00:46,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 01:00:46,808 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 01:00:46,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:00:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1038562883, now seen corresponding path program 31 times [2023-08-30 01:00:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:00:46,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957576195] [2023-08-30 01:00:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:00:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:00:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:00:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:00:46,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:00:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957576195] [2023-08-30 01:00:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957576195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 01:00:46,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469757707] [2023-08-30 01:00:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 01:00:46,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:00:46,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:00:46,925 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:00:46,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 01:00:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:00:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:00:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:00:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 01:00:47,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:00:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:00:47,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469757707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:00:47,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 01:00:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-30 01:00:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656049030] [2023-08-30 01:00:47,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 01:00:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 01:00:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:00:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 01:00:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-30 01:00:47,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-30 01:00:47,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 5316 transitions, 262351 flow. Second operand has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:00:47,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:00:47,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-30 01:00:47,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:01:49,778 INFO L130 PetriNetUnfolder]: 16465/32200 cut-off events. [2023-08-30 01:01:49,778 INFO L131 PetriNetUnfolder]: For 3785351/3785351 co-relation queries the response was YES. [2023-08-30 01:01:50,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565494 conditions, 32200 events. 16465/32200 cut-off events. For 3785351/3785351 co-relation queries the response was YES. Maximal size of possible extension queue 2534. Compared 327778 event pairs, 305 based on Foata normal form. 46/32246 useless extension candidates. Maximal degree in co-relation 565269. Up to 7228 conditions per place. [2023-08-30 01:01:50,500 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 1200 selfloop transitions, 4454 changer transitions 52/5706 dead transitions. [2023-08-30 01:01:50,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 5706 transitions, 286968 flow [2023-08-30 01:01:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 01:01:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 01:01:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3433 transitions. [2023-08-30 01:01:50,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182504873294347 [2023-08-30 01:01:50,503 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3433 transitions. [2023-08-30 01:01:50,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3433 transitions. [2023-08-30 01:01:50,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:01:50,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3433 transitions. [2023-08-30 01:01:50,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 71.52083333333333) internal successors, (3433), 48 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:01:50,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 171.0) internal successors, (8379), 49 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:01:50,509 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 171.0) internal successors, (8379), 49 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:01:50,509 INFO L175 Difference]: Start difference. First operand has 806 places, 5316 transitions, 262351 flow. Second operand 48 states and 3433 transitions. [2023-08-30 01:01:50,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 5706 transitions, 286968 flow Killed by 15