./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:56:45,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:56:45,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:56:45,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:56:45,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:56:45,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:56:45,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:56:45,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:56:45,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:56:45,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:56:45,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:56:45,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:56:45,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:56:45,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:56:45,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:56:45,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:56:45,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:56:45,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:56:45,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:56:45,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:56:46,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:56:46,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:56:46,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:56:46,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:56:46,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:56:46,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:56:46,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:56:46,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:56:46,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:56:46,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:56:46,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:56:46,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:56:46,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:56:46,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:56:46,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:56:46,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:56:46,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:56:46,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:56:46,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:56:46,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:56:46,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:56:46,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:56:46,065 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:56:46,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:56:46,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:56:46,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:56:46,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:56:46,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:56:46,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:56:46,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:56:46,070 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:56:46,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:56:46,071 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:56:46,071 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:56:46,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:56:46,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:56:46,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:56:46,072 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:56:46,072 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:56:46,072 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:56:46,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:56:46,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:56:46,073 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:56:46,073 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:56:46,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:56:46,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:56:46,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:56:46,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:56:46,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:56:46,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:56:46,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:56:46,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:56:46,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:56:46,076 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:56:46,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:56:46,076 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:56:46,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:56:46,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:56:46,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:56:46,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:56:46,449 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:56:46,450 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:56:46,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-30 07:56:47,699 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:56:48,027 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:56:48,028 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-30 07:56:48,047 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a5cd89c/f2499f64461041b085ded79086920ff5/FLAG27e96276a [2023-08-30 07:56:48,070 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a5cd89c/f2499f64461041b085ded79086920ff5 [2023-08-30 07:56:48,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:56:48,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:56:48,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:56:48,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:56:48,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:56:48,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502a953f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48, skipping insertion in model container [2023-08-30 07:56:48,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:56:48,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:56:48,468 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-08-30 07:56:48,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-08-30 07:56:48,484 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-08-30 07:56:48,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:56:48,509 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:56:48,561 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2023-08-30 07:56:48,574 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2023-08-30 07:56:48,576 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2023-08-30 07:56:48,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:56:48,636 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:56:48,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48 WrapperNode [2023-08-30 07:56:48,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:56:48,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:56:48,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:56:48,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:56:48,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,694 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2023-08-30 07:56:48,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:56:48,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:56:48,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:56:48,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:56:48,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:56:48,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:56:48,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:56:48,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:56:48,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (1/1) ... [2023-08-30 07:56:48,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:56:48,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:56:48,766 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 07:56:48,773 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 07:56:48,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 07:56:48,804 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 07:56:48,804 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 07:56:48,804 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 07:56:48,804 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 07:56:48,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 07:56:48,805 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 07:56:48,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:56:48,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:56:48,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:56:48,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-30 07:56:48,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 07:56:48,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:56:48,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:56:48,807 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 07:56:48,921 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:56:48,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:56:49,217 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:56:49,224 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:56:49,240 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 07:56:49,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:56:49 BoogieIcfgContainer [2023-08-30 07:56:49,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:56:49,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:56:49,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:56:49,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:56:49,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:56:48" (1/3) ... [2023-08-30 07:56:49,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738a22ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:56:49, skipping insertion in model container [2023-08-30 07:56:49,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:56:48" (2/3) ... [2023-08-30 07:56:49,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738a22ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:56:49, skipping insertion in model container [2023-08-30 07:56:49,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:56:49" (3/3) ... [2023-08-30 07:56:49,250 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-08-30 07:56:49,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:56:49,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 07:56:49,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:56:49,404 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 07:56:49,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 164 transitions, 344 flow [2023-08-30 07:56:49,552 INFO L130 PetriNetUnfolder]: 11/162 cut-off events. [2023-08-30 07:56:49,552 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:56:49,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 162 events. 11/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-30 07:56:49,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 164 transitions, 344 flow [2023-08-30 07:56:49,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 158 transitions, 328 flow [2023-08-30 07:56:49,572 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:56:49,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 158 transitions, 328 flow [2023-08-30 07:56:49,592 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 158 transitions, 328 flow [2023-08-30 07:56:49,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 158 transitions, 328 flow [2023-08-30 07:56:49,654 INFO L130 PetriNetUnfolder]: 11/158 cut-off events. [2023-08-30 07:56:49,654 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 07:56:49,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 11/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-30 07:56:49,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 5570 [2023-08-30 07:56:55,515 INFO L134 LiptonReduction]: Checked pairs total: 14674 [2023-08-30 07:56:55,516 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-30 07:56:55,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:56:55,545 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;@6b8f65fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:56:55,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-30 07:56:55,547 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 07:56:55,548 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:56:55,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:55,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 07:56:55,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:55,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash 648, now seen corresponding path program 1 times [2023-08-30 07:56:55,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:55,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316058373] [2023-08-30 07:56:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:55,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:55,680 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 07:56:55,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316058373] [2023-08-30 07:56:55,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316058373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:55,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:55,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 07:56:55,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852831345] [2023-08-30 07:56:55,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:55,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 07:56:55,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 07:56:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 07:56:55,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 314 [2023-08-30 07:56:55,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 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 07:56:55,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:55,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 314 [2023-08-30 07:56:55,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:56,108 INFO L130 PetriNetUnfolder]: 1306/2110 cut-off events. [2023-08-30 07:56:56,111 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 07:56:56,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 2110 events. 1306/2110 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 11023 event pairs, 994 based on Foata normal form. 48/1126 useless extension candidates. Maximal degree in co-relation 3825. Up to 1926 conditions per place. [2023-08-30 07:56:56,134 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 41 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-08-30 07:56:56,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 192 flow [2023-08-30 07:56:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 07:56:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 07:56:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 348 transitions. [2023-08-30 07:56:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554140127388535 [2023-08-30 07:56:56,148 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 348 transitions. [2023-08-30 07:56:56,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 348 transitions. [2023-08-30 07:56:56,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:56,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 348 transitions. [2023-08-30 07:56:56,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,161 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,163 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 116 flow. Second operand 2 states and 348 transitions. [2023-08-30 07:56:56,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 192 flow [2023-08-30 07:56:56,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 07:56:56,168 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 102 flow [2023-08-30 07:56:56,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-08-30 07:56:56,174 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 07:56:56,174 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 102 flow [2023-08-30 07:56:56,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 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 07:56:56,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:56,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:56:56,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 07:56:56,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:56,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:56,186 INFO L85 PathProgramCache]: Analyzing trace with hash 636707, now seen corresponding path program 1 times [2023-08-30 07:56:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:56,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573666641] [2023-08-30 07:56:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:56,432 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 07:56:56,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:56,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573666641] [2023-08-30 07:56:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573666641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:56,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:56,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609093650] [2023-08-30 07:56:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:56,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-30 07:56:56,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:56,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-30 07:56:56,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:56,674 INFO L130 PetriNetUnfolder]: 1278/2053 cut-off events. [2023-08-30 07:56:56,675 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 07:56:56,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 2053 events. 1278/2053 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 10627 event pairs, 972 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 3940. Up to 1874 conditions per place. [2023-08-30 07:56:56,686 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 37 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 07:56:56,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 176 flow [2023-08-30 07:56:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-30 07:56:56,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116772823779193 [2023-08-30 07:56:56,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-30 07:56:56,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-30 07:56:56,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:56,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-30 07:56:56,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,701 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 102 flow. Second operand 3 states and 482 transitions. [2023-08-30 07:56:56,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 176 flow [2023-08-30 07:56:56,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:56:56,703 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 102 flow [2023-08-30 07:56:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-30 07:56:56,704 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 07:56:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 102 flow [2023-08-30 07:56:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:56,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:56:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 07:56:56,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:56,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 636709, now seen corresponding path program 1 times [2023-08-30 07:56:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390539992] [2023-08-30 07:56:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:56,788 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 07:56:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390539992] [2023-08-30 07:56:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390539992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:56,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:56,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281193469] [2023-08-30 07:56:56,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:56,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:56,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-08-30 07:56:56,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:56,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:56,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-08-30 07:56:56,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:57,012 INFO L130 PetriNetUnfolder]: 1250/1996 cut-off events. [2023-08-30 07:56:57,012 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 07:56:57,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3839 conditions, 1996 events. 1250/1996 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10197 event pairs, 950 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3835. Up to 1824 conditions per place. [2023-08-30 07:56:57,024 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 07:56:57,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 172 flow [2023-08-30 07:56:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-30 07:56:57,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-30 07:56:57,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-30 07:56:57,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-30 07:56:57,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:57,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-30 07:56:57,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,031 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 102 flow. Second operand 3 states and 468 transitions. [2023-08-30 07:56:57,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 172 flow [2023-08-30 07:56:57,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:57,033 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 98 flow [2023-08-30 07:56:57,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 07:56:57,034 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 07:56:57,034 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 98 flow [2023-08-30 07:56:57,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:57,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:56:57,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 07:56:57,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:57,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 611864871, now seen corresponding path program 1 times [2023-08-30 07:56:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:57,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651159790] [2023-08-30 07:56:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:57,256 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 07:56:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651159790] [2023-08-30 07:56:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651159790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:57,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:57,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:57,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693857830] [2023-08-30 07:56:57,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:57,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:57,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-30 07:56:57,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:57,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-30 07:56:57,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:57,605 INFO L130 PetriNetUnfolder]: 1939/3219 cut-off events. [2023-08-30 07:56:57,606 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:56:57,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 3219 events. 1939/3219 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17053 event pairs, 691 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 6068. Up to 1717 conditions per place. [2023-08-30 07:56:57,639 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 63 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-30 07:56:57,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 293 flow [2023-08-30 07:56:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-30 07:56:57,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456475583864119 [2023-08-30 07:56:57,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-30 07:56:57,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-30 07:56:57,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:57,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-30 07:56:57,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,651 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 98 flow. Second operand 3 states and 514 transitions. [2023-08-30 07:56:57,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 293 flow [2023-08-30 07:56:57,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:57,653 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 119 flow [2023-08-30 07:56:57,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-30 07:56:57,655 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 07:56:57,656 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 119 flow [2023-08-30 07:56:57,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:57,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:56:57,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 07:56:57,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:57,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:57,658 INFO L85 PathProgramCache]: Analyzing trace with hash 611864870, now seen corresponding path program 1 times [2023-08-30 07:56:57,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:57,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791896855] [2023-08-30 07:56:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:57,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:57,768 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 07:56:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791896855] [2023-08-30 07:56:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791896855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:57,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:56:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028132078] [2023-08-30 07:56:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:57,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-08-30 07:56:57,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:57,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:57,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-08-30 07:56:57,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:58,021 INFO L130 PetriNetUnfolder]: 1865/3024 cut-off events. [2023-08-30 07:56:58,021 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 07:56:58,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6148 conditions, 3024 events. 1865/3024 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15523 event pairs, 1415 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 6143. Up to 2694 conditions per place. [2023-08-30 07:56:58,040 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 07:56:58,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 189 flow [2023-08-30 07:56:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-30 07:56:58,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021231422505308 [2023-08-30 07:56:58,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-30 07:56:58,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-30 07:56:58,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:58,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-30 07:56:58,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,048 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 119 flow. Second operand 3 states and 473 transitions. [2023-08-30 07:56:58,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 189 flow [2023-08-30 07:56:58,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:56:58,050 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 114 flow [2023-08-30 07:56:58,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 07:56:58,051 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 07:56:58,051 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 114 flow [2023-08-30 07:56:58,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:58,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:56:58,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 07:56:58,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:58,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 611891360, now seen corresponding path program 1 times [2023-08-30 07:56:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:58,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998556915] [2023-08-30 07:56:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:56:58,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:58,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998556915] [2023-08-30 07:56:58,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998556915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:58,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:58,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:56:58,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573798149] [2023-08-30 07:56:58,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:56:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:58,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:56:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:56:58,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-08-30 07:56:58,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:58,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-08-30 07:56:58,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:58,412 INFO L130 PetriNetUnfolder]: 1242/2048 cut-off events. [2023-08-30 07:56:58,412 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 07:56:58,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4138 conditions, 2048 events. 1242/2048 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10119 event pairs, 920 based on Foata normal form. 0/1298 useless extension candidates. Maximal degree in co-relation 4133. Up to 1825 conditions per place. [2023-08-30 07:56:58,428 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 34 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 07:56:58,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 184 flow [2023-08-30 07:56:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-30 07:56:58,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989384288747346 [2023-08-30 07:56:58,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-30 07:56:58,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-30 07:56:58,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:58,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-30 07:56:58,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,436 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 114 flow. Second operand 3 states and 470 transitions. [2023-08-30 07:56:58,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 184 flow [2023-08-30 07:56:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:58,439 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 112 flow [2023-08-30 07:56:58,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-30 07:56:58,442 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 07:56:58,442 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 112 flow [2023-08-30 07:56:58,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:58,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:56:58,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 07:56:58,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:58,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:58,445 INFO L85 PathProgramCache]: Analyzing trace with hash 611891359, now seen corresponding path program 1 times [2023-08-30 07:56:58,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:58,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431845289] [2023-08-30 07:56:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:58,514 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 07:56:58,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:58,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431845289] [2023-08-30 07:56:58,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431845289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:58,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:58,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:56:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981312894] [2023-08-30 07:56:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:58,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:56:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:56:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:56:58,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 314 [2023-08-30 07:56:58,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:58,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 314 [2023-08-30 07:56:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:58,718 INFO L130 PetriNetUnfolder]: 797/1369 cut-off events. [2023-08-30 07:56:58,718 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 07:56:58,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1369 events. 797/1369 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6487 event pairs, 575 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 2765. Up to 1210 conditions per place. [2023-08-30 07:56:58,726 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 33 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 07:56:58,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 180 flow [2023-08-30 07:56:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-30 07:56:58,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47876857749469215 [2023-08-30 07:56:58,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-30 07:56:58,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-30 07:56:58,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:58,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-30 07:56:58,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,733 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 112 flow. Second operand 3 states and 451 transitions. [2023-08-30 07:56:58,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 180 flow [2023-08-30 07:56:58,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:58,735 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 110 flow [2023-08-30 07:56:58,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-30 07:56:58,735 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -9 predicate places. [2023-08-30 07:56:58,736 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 110 flow [2023-08-30 07:56:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:58,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 07:56:58,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 07:56:58,737 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:58,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1787942298, now seen corresponding path program 1 times [2023-08-30 07:56:58,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:58,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581055395] [2023-08-30 07:56:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:58,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:58,850 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 07:56:58,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:58,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581055395] [2023-08-30 07:56:58,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581055395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:58,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:56:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203355278] [2023-08-30 07:56:58,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:58,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:58,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:58,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 07:56:58,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:58,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:58,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 07:56:58,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:59,021 INFO L130 PetriNetUnfolder]: 653/1175 cut-off events. [2023-08-30 07:56:59,021 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 07:56:59,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1175 events. 653/1175 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5295 event pairs, 183 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 2346. Up to 699 conditions per place. [2023-08-30 07:56:59,027 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-30 07:56:59,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 263 flow [2023-08-30 07:56:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:56:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:56:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 07:56:59,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254777070063694 [2023-08-30 07:56:59,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 07:56:59,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 07:56:59,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:59,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 07:56:59,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,034 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 110 flow. Second operand 3 states and 495 transitions. [2023-08-30 07:56:59,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 263 flow [2023-08-30 07:56:59,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:59,036 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2023-08-30 07:56:59,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-08-30 07:56:59,037 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 07:56:59,037 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2023-08-30 07:56:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:59,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:56:59,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 07:56:59,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:59,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:59,039 INFO L85 PathProgramCache]: Analyzing trace with hash 224825544, now seen corresponding path program 1 times [2023-08-30 07:56:59,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:59,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697575400] [2023-08-30 07:56:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:59,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:59,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:56:59,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017706071] [2023-08-30 07:56:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:59,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:56:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:56:59,055 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 07:56:59,084 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 07:56:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:56:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:56:59,206 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 07:56:59,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:56:59,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:59,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697575400] [2023-08-30 07:56:59,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:56:59,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017706071] [2023-08-30 07:56:59,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017706071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:59,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:56:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643453032] [2023-08-30 07:56:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:56:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:56:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:56:59,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 314 [2023-08-30 07:56:59,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:59,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 314 [2023-08-30 07:56:59,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:56:59,541 INFO L130 PetriNetUnfolder]: 699/1294 cut-off events. [2023-08-30 07:56:59,541 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-30 07:56:59,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2632 conditions, 1294 events. 699/1294 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6393 event pairs, 231 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 2626. Up to 537 conditions per place. [2023-08-30 07:56:59,548 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 61 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2023-08-30 07:56:59,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 76 transitions, 324 flow [2023-08-30 07:56:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:56:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:56:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-30 07:56:59,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063694267515924 [2023-08-30 07:56:59,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-30 07:56:59,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-30 07:56:59,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:56:59,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-30 07:56:59,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,556 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 636 transitions. [2023-08-30 07:56:59,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 76 transitions, 324 flow [2023-08-30 07:56:59,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:56:59,558 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 140 flow [2023-08-30 07:56:59,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 07:56:59,559 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 07:56:59,559 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 140 flow [2023-08-30 07:56:59,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:56:59,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:56:59,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 07:56:59,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:56:59,767 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:56:59,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:56:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1384112314, now seen corresponding path program 1 times [2023-08-30 07:56:59,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:56:59,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237996094] [2023-08-30 07:56:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:56:59,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:56:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:56:59,844 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 07:56:59,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:56:59,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237996094] [2023-08-30 07:56:59,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237996094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:56:59,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:56:59,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:56:59,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29205482] [2023-08-30 07:56:59,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:56:59,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:56:59,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:56:59,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:56:59,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:56:59,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-30 07:56:59,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:56:59,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:56:59,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-30 07:56:59,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:00,037 INFO L130 PetriNetUnfolder]: 886/1554 cut-off events. [2023-08-30 07:57:00,037 INFO L131 PetriNetUnfolder]: For 957/957 co-relation queries the response was YES. [2023-08-30 07:57:00,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 1554 events. 886/1554 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7191 event pairs, 361 based on Foata normal form. 0/1286 useless extension candidates. Maximal degree in co-relation 3727. Up to 908 conditions per place. [2023-08-30 07:57:00,045 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 60 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 07:57:00,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 353 flow [2023-08-30 07:57:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 07:57:00,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307855626326964 [2023-08-30 07:57:00,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 07:57:00,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 07:57:00,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:00,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 07:57:00,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,052 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 140 flow. Second operand 3 states and 500 transitions. [2023-08-30 07:57:00,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 353 flow [2023-08-30 07:57:00,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:00,056 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 151 flow [2023-08-30 07:57:00,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 07:57:00,061 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-30 07:57:00,061 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 151 flow [2023-08-30 07:57:00,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:00,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:00,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 07:57:00,062 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:00,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:00,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2056110489, now seen corresponding path program 1 times [2023-08-30 07:57:00,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:00,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561884941] [2023-08-30 07:57:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:00,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:00,099 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 07:57:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561884941] [2023-08-30 07:57:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561884941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:00,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:00,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:57:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116316477] [2023-08-30 07:57:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:57:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:57:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:57:00,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-30 07:57:00,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:00,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-30 07:57:00,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:00,330 INFO L130 PetriNetUnfolder]: 965/1848 cut-off events. [2023-08-30 07:57:00,331 INFO L131 PetriNetUnfolder]: For 638/638 co-relation queries the response was YES. [2023-08-30 07:57:00,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 1848 events. 965/1848 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10047 event pairs, 430 based on Foata normal form. 0/1600 useless extension candidates. Maximal degree in co-relation 4297. Up to 1338 conditions per place. [2023-08-30 07:57:00,340 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 55 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-30 07:57:00,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 335 flow [2023-08-30 07:57:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 07:57:00,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529723991507431 [2023-08-30 07:57:00,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 07:57:00,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 07:57:00,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:00,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 07:57:00,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,347 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 151 flow. Second operand 3 states and 499 transitions. [2023-08-30 07:57:00,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 335 flow [2023-08-30 07:57:00,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:00,351 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 171 flow [2023-08-30 07:57:00,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-30 07:57:00,352 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-30 07:57:00,352 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 171 flow [2023-08-30 07:57:00,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:00,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:00,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 07:57:00,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:00,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1768746055, now seen corresponding path program 1 times [2023-08-30 07:57:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:00,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036188946] [2023-08-30 07:57:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:00,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:00,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296433807] [2023-08-30 07:57:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:00,368 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 07:57:00,386 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 07:57:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 07:57:00,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:00,498 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 07:57:00,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:57:00,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036188946] [2023-08-30 07:57:00,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296433807] [2023-08-30 07:57:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296433807] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 07:57:00,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:57:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-08-30 07:57:00,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865875089] [2023-08-30 07:57:00,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:57:00,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:00,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:57:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:57:00,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 07:57:00,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:00,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 07:57:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:00,684 INFO L130 PetriNetUnfolder]: 721/1327 cut-off events. [2023-08-30 07:57:00,685 INFO L131 PetriNetUnfolder]: For 814/814 co-relation queries the response was YES. [2023-08-30 07:57:00,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3192 conditions, 1327 events. 721/1327 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5921 event pairs, 249 based on Foata normal form. 114/1309 useless extension candidates. Maximal degree in co-relation 3182. Up to 744 conditions per place. [2023-08-30 07:57:00,693 INFO L137 encePairwiseOnDemand]: 308/314 looper letters, 55 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-30 07:57:00,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 339 flow [2023-08-30 07:57:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-30 07:57:00,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233545647558386 [2023-08-30 07:57:00,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-30 07:57:00,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-30 07:57:00,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:00,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-30 07:57:00,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,699 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 171 flow. Second operand 3 states and 493 transitions. [2023-08-30 07:57:00,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 339 flow [2023-08-30 07:57:00,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 328 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 07:57:00,703 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 177 flow [2023-08-30 07:57:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-30 07:57:00,704 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 07:57:00,704 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 177 flow [2023-08-30 07:57:00,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:00,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:00,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:00,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:57:00,911 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,SelfDestructingSolverStorable11 [2023-08-30 07:57:00,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:00,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1753815584, now seen corresponding path program 1 times [2023-08-30 07:57:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:00,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956950577] [2023-08-30 07:57:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:00,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590474438] [2023-08-30 07:57:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:00,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:00,931 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 07:57:00,933 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 07:57:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:57:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 07:57:01,086 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 07:57:01,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956950577] [2023-08-30 07:57:01,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590474438] [2023-08-30 07:57:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590474438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:01,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:01,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:57:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197449361] [2023-08-30 07:57:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:01,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:57:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:57:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:57:01,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 07:57:01,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:01,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 07:57:01,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:01,247 INFO L130 PetriNetUnfolder]: 616/1181 cut-off events. [2023-08-30 07:57:01,247 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-30 07:57:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 1181 events. 616/1181 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5166 event pairs, 188 based on Foata normal form. 30/1123 useless extension candidates. Maximal degree in co-relation 2928. Up to 616 conditions per place. [2023-08-30 07:57:01,253 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 07:57:01,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 333 flow [2023-08-30 07:57:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-30 07:57:01,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148619957537155 [2023-08-30 07:57:01,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-30 07:57:01,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-30 07:57:01,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:01,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-30 07:57:01,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,260 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 177 flow. Second operand 3 states and 485 transitions. [2023-08-30 07:57:01,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 333 flow [2023-08-30 07:57:01,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 07:57:01,274 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 179 flow [2023-08-30 07:57:01,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-08-30 07:57:01,277 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 07:57:01,277 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 179 flow [2023-08-30 07:57:01,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:01,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:01,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 07:57:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:01,485 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:01,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 87621160, now seen corresponding path program 1 times [2023-08-30 07:57:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:01,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452817192] [2023-08-30 07:57:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:01,546 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 07:57:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:01,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452817192] [2023-08-30 07:57:01,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452817192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:01,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:01,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:57:01,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004112248] [2023-08-30 07:57:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:57:01,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:57:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:57:01,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-30 07:57:01,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:01,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-30 07:57:01,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:01,746 INFO L130 PetriNetUnfolder]: 780/1564 cut-off events. [2023-08-30 07:57:01,746 INFO L131 PetriNetUnfolder]: For 965/977 co-relation queries the response was YES. [2023-08-30 07:57:01,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 1564 events. 780/1564 cut-off events. For 965/977 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7874 event pairs, 351 based on Foata normal form. 34/1517 useless extension candidates. Maximal degree in co-relation 3939. Up to 935 conditions per place. [2023-08-30 07:57:01,754 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 64 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-30 07:57:01,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 435 flow [2023-08-30 07:57:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 07:57:01,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318471337579618 [2023-08-30 07:57:01,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 07:57:01,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 07:57:01,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:01,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 07:57:01,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,760 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 179 flow. Second operand 3 states and 501 transitions. [2023-08-30 07:57:01,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 435 flow [2023-08-30 07:57:01,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:01,765 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 187 flow [2023-08-30 07:57:01,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-30 07:57:01,765 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 07:57:01,765 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 187 flow [2023-08-30 07:57:01,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:01,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:01,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 07:57:01,766 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:01,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 926893698, now seen corresponding path program 1 times [2023-08-30 07:57:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:01,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385918891] [2023-08-30 07:57:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:01,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:01,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247481597] [2023-08-30 07:57:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:01,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:01,782 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 07:57:01,805 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 07:57:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 07:57:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:01,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 07:57:02,148 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 07:57:02,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:02,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:02,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385918891] [2023-08-30 07:57:02,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247481597] [2023-08-30 07:57:02,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247481597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:02,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:02,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:57:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488774078] [2023-08-30 07:57:02,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:02,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:57:02,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:57:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:57:02,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-30 07:57:02,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:02,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:02,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-30 07:57:02,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:02,450 INFO L130 PetriNetUnfolder]: 1169/2351 cut-off events. [2023-08-30 07:57:02,450 INFO L131 PetriNetUnfolder]: For 1822/1836 co-relation queries the response was YES. [2023-08-30 07:57:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 2351 events. 1169/2351 cut-off events. For 1822/1836 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13034 event pairs, 655 based on Foata normal form. 0/2233 useless extension candidates. Maximal degree in co-relation 6219. Up to 1260 conditions per place. [2023-08-30 07:57:02,464 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-30 07:57:02,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 438 flow [2023-08-30 07:57:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 07:57:02,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529723991507431 [2023-08-30 07:57:02,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 07:57:02,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 07:57:02,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:02,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 07:57:02,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:02,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:02,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:02,470 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 187 flow. Second operand 3 states and 499 transitions. [2023-08-30 07:57:02,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 438 flow [2023-08-30 07:57:02,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:02,476 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 197 flow [2023-08-30 07:57:02,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-30 07:57:02,477 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-08-30 07:57:02,477 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 197 flow [2023-08-30 07:57:02,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:02,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:02,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:02,489 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 07:57:02,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 07:57:02,689 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:02,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2002078106, now seen corresponding path program 1 times [2023-08-30 07:57:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333908290] [2023-08-30 07:57:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:02,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:02,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390434301] [2023-08-30 07:57:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:02,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:02,707 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 07:57:02,726 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 07:57:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 07:57:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:03,094 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 07:57:03,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:03,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333908290] [2023-08-30 07:57:03,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:03,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390434301] [2023-08-30 07:57:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390434301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:03,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 07:57:03,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325375645] [2023-08-30 07:57:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:57:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:57:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:57:03,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 314 [2023-08-30 07:57:03,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:03,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:03,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 314 [2023-08-30 07:57:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:03,378 INFO L130 PetriNetUnfolder]: 837/1699 cut-off events. [2023-08-30 07:57:03,378 INFO L131 PetriNetUnfolder]: For 1244/1256 co-relation queries the response was YES. [2023-08-30 07:57:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 1699 events. 837/1699 cut-off events. For 1244/1256 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8381 event pairs, 309 based on Foata normal form. 0/1645 useless extension candidates. Maximal degree in co-relation 4458. Up to 715 conditions per place. [2023-08-30 07:57:03,393 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 70 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-30 07:57:03,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 460 flow [2023-08-30 07:57:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:57:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:57:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-30 07:57:03,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015923566878981 [2023-08-30 07:57:03,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-30 07:57:03,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-30 07:57:03,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:03,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-30 07:57:03,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:03,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:03,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:03,401 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 197 flow. Second operand 4 states and 630 transitions. [2023-08-30 07:57:03,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 460 flow [2023-08-30 07:57:03,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:03,409 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 205 flow [2023-08-30 07:57:03,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-08-30 07:57:03,411 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2023-08-30 07:57:03,411 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 205 flow [2023-08-30 07:57:03,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:03,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:03,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:03,423 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 07:57:03,619 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,SelfDestructingSolverStorable15 [2023-08-30 07:57:03,619 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:03,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:03,620 INFO L85 PathProgramCache]: Analyzing trace with hash -316564774, now seen corresponding path program 1 times [2023-08-30 07:57:03,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342615376] [2023-08-30 07:57:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:03,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:03,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508279353] [2023-08-30 07:57:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:03,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:03,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:03,638 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 07:57:03,641 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 07:57:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:03,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 07:57:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:03,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-30 07:57:03,894 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 07:57:03,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 07:57:03,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 07:57:03,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-30 07:57:04,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-08-30 07:57:04,128 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 07:57:04,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342615376] [2023-08-30 07:57:04,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508279353] [2023-08-30 07:57:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508279353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:57:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 07:57:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019135170] [2023-08-30 07:57:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:57:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:57:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:57:04,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 314 [2023-08-30 07:57:04,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:04,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:04,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 314 [2023-08-30 07:57:04,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:05,042 INFO L130 PetriNetUnfolder]: 1290/2586 cut-off events. [2023-08-30 07:57:05,043 INFO L131 PetriNetUnfolder]: For 1932/1954 co-relation queries the response was YES. [2023-08-30 07:57:05,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6828 conditions, 2586 events. 1290/2586 cut-off events. For 1932/1954 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13347 event pairs, 524 based on Foata normal form. 4/2532 useless extension candidates. Maximal degree in co-relation 6813. Up to 787 conditions per place. [2023-08-30 07:57:05,062 INFO L137 encePairwiseOnDemand]: 304/314 looper letters, 107 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2023-08-30 07:57:05,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 130 transitions, 746 flow [2023-08-30 07:57:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 07:57:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 07:57:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1313 transitions. [2023-08-30 07:57:05,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46461429582448693 [2023-08-30 07:57:05,066 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1313 transitions. [2023-08-30 07:57:05,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1313 transitions. [2023-08-30 07:57:05,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:05,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1313 transitions. [2023-08-30 07:57:05,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.88888888888889) internal successors, (1313), 9 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:05,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:05,102 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:05,102 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 205 flow. Second operand 9 states and 1313 transitions. [2023-08-30 07:57:05,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 130 transitions, 746 flow [2023-08-30 07:57:05,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 130 transitions, 738 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 07:57:05,107 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 301 flow [2023-08-30 07:57:05,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=301, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-30 07:57:05,107 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2023-08-30 07:57:05,107 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 301 flow [2023-08-30 07:57:05,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:05,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:05,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:05,120 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 07:57:05,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 07:57:05,309 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:05,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1119565154, now seen corresponding path program 1 times [2023-08-30 07:57:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291549784] [2023-08-30 07:57:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:05,379 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 07:57:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291549784] [2023-08-30 07:57:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291549784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:57:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550009609] [2023-08-30 07:57:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:05,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:05,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:05,382 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 07:57:05,384 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 07:57:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:05,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 07:57:05,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:05,521 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 07:57:05,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:05,554 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 07:57:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550009609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:05,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:57:05,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 07:57:05,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336427433] [2023-08-30 07:57:05,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:05,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:57:05,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:57:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:57:05,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-08-30 07:57:05,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 147.75) internal successors, (1182), 8 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 07:57:05,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:05,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-08-30 07:57:05,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:06,565 INFO L130 PetriNetUnfolder]: 3598/7236 cut-off events. [2023-08-30 07:57:06,565 INFO L131 PetriNetUnfolder]: For 7259/7329 co-relation queries the response was YES. [2023-08-30 07:57:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20014 conditions, 7236 events. 3598/7236 cut-off events. For 7259/7329 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 48851 event pairs, 242 based on Foata normal form. 652/7802 useless extension candidates. Maximal degree in co-relation 19994. Up to 1309 conditions per place. [2023-08-30 07:57:06,616 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 271 selfloop transitions, 47 changer transitions 0/329 dead transitions. [2023-08-30 07:57:06,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 329 transitions, 2363 flow [2023-08-30 07:57:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 07:57:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 07:57:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2573 transitions. [2023-08-30 07:57:06,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121417197452229 [2023-08-30 07:57:06,624 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2573 transitions. [2023-08-30 07:57:06,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2573 transitions. [2023-08-30 07:57:06,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:06,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2573 transitions. [2023-08-30 07:57:06,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 160.8125) internal successors, (2573), 16 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:06,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 314.0) internal successors, (5338), 17 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:06,651 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 314.0) internal successors, (5338), 17 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:06,651 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 301 flow. Second operand 16 states and 2573 transitions. [2023-08-30 07:57:06,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 329 transitions, 2363 flow [2023-08-30 07:57:06,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 329 transitions, 2334 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 07:57:06,668 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 758 flow [2023-08-30 07:57:06,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=758, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-30 07:57:06,669 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-30 07:57:06,669 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 758 flow [2023-08-30 07:57:06,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.75) internal successors, (1182), 8 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 07:57:06,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:06,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:06,682 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 07:57:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:06,883 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:06,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash 411249242, now seen corresponding path program 1 times [2023-08-30 07:57:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702849372] [2023-08-30 07:57:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:06,905 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86039571] [2023-08-30 07:57:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:06,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:06,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:06,906 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 07:57:06,909 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 07:57:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 07:57:07,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:07,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:07,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:07,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 07:57:07,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 07:57:07,354 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 07:57:07,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:09,315 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 07:57:09,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:09,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702849372] [2023-08-30 07:57:09,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:09,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86039571] [2023-08-30 07:57:09,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86039571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:09,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:09,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 07:57:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486386006] [2023-08-30 07:57:09,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:57:09,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:57:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:57:09,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 314 [2023-08-30 07:57:09,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 758 flow. Second operand has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:09,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:09,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 314 [2023-08-30 07:57:09,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:10,327 INFO L130 PetriNetUnfolder]: 2852/5729 cut-off events. [2023-08-30 07:57:10,328 INFO L131 PetriNetUnfolder]: For 32252/32500 co-relation queries the response was YES. [2023-08-30 07:57:10,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 5729 events. 2852/5729 cut-off events. For 32252/32500 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 35773 event pairs, 1335 based on Foata normal form. 246/5852 useless extension candidates. Maximal degree in co-relation 23369. Up to 2876 conditions per place. [2023-08-30 07:57:10,381 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 125 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-08-30 07:57:10,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1360 flow [2023-08-30 07:57:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:57:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:57:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-30 07:57:10,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48089171974522293 [2023-08-30 07:57:10,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-30 07:57:10,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-30 07:57:10,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:10,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-30 07:57:10,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:10,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:10,388 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:10,388 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 758 flow. Second operand 4 states and 604 transitions. [2023-08-30 07:57:10,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1360 flow [2023-08-30 07:57:10,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 136 transitions, 1263 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-30 07:57:10,477 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 668 flow [2023-08-30 07:57:10,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=668, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2023-08-30 07:57:10,478 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-08-30 07:57:10,478 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 668 flow [2023-08-30 07:57:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:10,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:10,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:10,491 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 07:57:10,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:10,686 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:10,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1418128194, now seen corresponding path program 1 times [2023-08-30 07:57:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:10,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67780505] [2023-08-30 07:57:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:10,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:10,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:10,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412605615] [2023-08-30 07:57:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:10,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:10,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:10,713 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 07:57:10,716 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 07:57:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:57:11,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:11,375 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 07:57:11,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:12,209 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 07:57:12,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:12,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67780505] [2023-08-30 07:57:12,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:12,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412605615] [2023-08-30 07:57:12,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412605615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:12,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:12,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 07:57:12,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049368790] [2023-08-30 07:57:12,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:57:12,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:57:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:57:13,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 314 [2023-08-30 07:57:13,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 668 flow. Second operand has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:13,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:13,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 314 [2023-08-30 07:57:13,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:16,028 INFO L130 PetriNetUnfolder]: 3100/6440 cut-off events. [2023-08-30 07:57:16,028 INFO L131 PetriNetUnfolder]: For 34950/35126 co-relation queries the response was YES. [2023-08-30 07:57:16,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25609 conditions, 6440 events. 3100/6440 cut-off events. For 34950/35126 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 38762 event pairs, 838 based on Foata normal form. 78/6417 useless extension candidates. Maximal degree in co-relation 25577. Up to 1225 conditions per place. [2023-08-30 07:57:16,075 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 254 selfloop transitions, 11 changer transitions 0/275 dead transitions. [2023-08-30 07:57:16,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 275 transitions, 2543 flow [2023-08-30 07:57:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 07:57:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 07:57:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1504 transitions. [2023-08-30 07:57:16,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789808917197452 [2023-08-30 07:57:16,079 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1504 transitions. [2023-08-30 07:57:16,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1504 transitions. [2023-08-30 07:57:16,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:16,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1504 transitions. [2023-08-30 07:57:16,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.4) internal successors, (1504), 10 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:16,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:16,087 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:16,087 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 668 flow. Second operand 10 states and 1504 transitions. [2023-08-30 07:57:16,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 275 transitions, 2543 flow [2023-08-30 07:57:16,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 275 transitions, 2528 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 07:57:16,150 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 725 flow [2023-08-30 07:57:16,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=725, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-30 07:57:16,150 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2023-08-30 07:57:16,150 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 725 flow [2023-08-30 07:57:16,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:16,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:16,151 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:16,163 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 07:57:16,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:16,359 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:16,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash 796499575, now seen corresponding path program 2 times [2023-08-30 07:57:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:16,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30196276] [2023-08-30 07:57:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:16,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 07:57:16,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30196276] [2023-08-30 07:57:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30196276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:57:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118922170] [2023-08-30 07:57:16,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:57:16,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:16,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:16,484 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 07:57:16,507 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 07:57:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 07:57:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:57:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 07:57:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-08-30 07:57:16,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 07:57:16,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118922170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:57:16,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 07:57:16,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 07:57:16,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716797374] [2023-08-30 07:57:16,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:57:16,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:57:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:57:16,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:57:16,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 07:57:16,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 725 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:16,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:16,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 07:57:16,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:57:17,721 INFO L130 PetriNetUnfolder]: 3054/6333 cut-off events. [2023-08-30 07:57:17,721 INFO L131 PetriNetUnfolder]: For 34887/35015 co-relation queries the response was YES. [2023-08-30 07:57:17,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25502 conditions, 6333 events. 3054/6333 cut-off events. For 34887/35015 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 38224 event pairs, 2154 based on Foata normal form. 27/6251 useless extension candidates. Maximal degree in co-relation 25468. Up to 5212 conditions per place. [2023-08-30 07:57:17,773 INFO L137 encePairwiseOnDemand]: 312/314 looper letters, 77 selfloop transitions, 1 changer transitions 6/94 dead transitions. [2023-08-30 07:57:17,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 884 flow [2023-08-30 07:57:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:57:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:57:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-30 07:57:17,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363057324840764 [2023-08-30 07:57:17,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-30 07:57:17,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-30 07:57:17,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:57:17,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-30 07:57:17,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:17,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:17,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:17,780 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 725 flow. Second operand 3 states and 465 transitions. [2023-08-30 07:57:17,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 884 flow [2023-08-30 07:57:17,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 870 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 07:57:17,907 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 647 flow [2023-08-30 07:57:17,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2023-08-30 07:57:17,907 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2023-08-30 07:57:17,907 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 647 flow [2023-08-30 07:57:17,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:17,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:57:17,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:57:17,920 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 07:57:18,108 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,SelfDestructingSolverStorable20 [2023-08-30 07:57:18,108 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:57:18,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:57:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash -25068098, now seen corresponding path program 1 times [2023-08-30 07:57:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:57:18,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857767781] [2023-08-30 07:57:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:18,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:57:18,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:57:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884764997] [2023-08-30 07:57:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:57:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:57:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:57:18,126 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 07:57:18,150 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 07:57:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:57:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 07:57:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:57:19,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 07:57:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:57:19,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:57:19,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 07:57:19,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:57:19,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-30 07:57:19,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:57:19,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 131 [2023-08-30 07:57:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:57:31,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:57:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857767781] [2023-08-30 07:57:31,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 07:57:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884764997] [2023-08-30 07:57:31,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884764997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:57:31,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 07:57:31,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2023-08-30 07:57:31,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440579105] [2023-08-30 07:57:31,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 07:57:31,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 07:57:31,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:57:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 07:57:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-08-30 07:57:40,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-08-30 07:57:55,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 314 [2023-08-30 07:57:55,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 647 flow. Second operand has 27 states, 27 states have (on average 114.29629629629629) internal successors, (3086), 27 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:57:55,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:57:55,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 314 [2023-08-30 07:57:55,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:58:37,773 WARN L222 SmtUtils]: Spent 12.27s on a formula simplification. DAG size of input: 67 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:59:00,408 WARN L222 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 79 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:59:31,827 WARN L222 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 76 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 07:59:49,467 INFO L130 PetriNetUnfolder]: 7574/14480 cut-off events. [2023-08-30 07:59:49,467 INFO L131 PetriNetUnfolder]: For 79279/79327 co-relation queries the response was YES. [2023-08-30 07:59:49,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59377 conditions, 14480 events. 7574/14480 cut-off events. For 79279/79327 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 98172 event pairs, 915 based on Foata normal form. 30/14398 useless extension candidates. Maximal degree in co-relation 59344. Up to 2732 conditions per place. [2023-08-30 07:59:49,539 INFO L137 encePairwiseOnDemand]: 297/314 looper letters, 473 selfloop transitions, 214 changer transitions 125/816 dead transitions. [2023-08-30 07:59:49,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 816 transitions, 7385 flow [2023-08-30 07:59:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-30 07:59:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-30 07:59:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 8476 transitions. [2023-08-30 07:59:49,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38019197990490716 [2023-08-30 07:59:49,562 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 8476 transitions. [2023-08-30 07:59:49,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 8476 transitions. [2023-08-30 07:59:49,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:59:49,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 8476 transitions. [2023-08-30 07:59:49,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 119.38028169014085) internal successors, (8476), 71 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:59:49,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 314.0) internal successors, (22608), 72 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:59:49,610 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 314.0) internal successors, (22608), 72 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:59:49,610 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 647 flow. Second operand 71 states and 8476 transitions. [2023-08-30 07:59:49,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 816 transitions, 7385 flow [2023-08-30 07:59:49,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 816 transitions, 7380 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 07:59:49,802 INFO L231 Difference]: Finished difference. Result has 187 places, 283 transitions, 2916 flow [2023-08-30 07:59:49,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=2916, PETRI_PLACES=187, PETRI_TRANSITIONS=283} [2023-08-30 07:59:49,803 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 135 predicate places. [2023-08-30 07:59:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 283 transitions, 2916 flow [2023-08-30 07:59:49,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 114.29629629629629) internal successors, (3086), 27 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:59:49,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:59:49,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:59:49,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 07:59:50,012 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,SelfDestructingSolverStorable21 [2023-08-30 07:59:50,013 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 07:59:50,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:59:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1973238672, now seen corresponding path program 2 times [2023-08-30 07:59:50,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:59:50,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75940184] [2023-08-30 07:59:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:59:50,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:59:50,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 07:59:50,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987381131] [2023-08-30 07:59:50,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:59:50,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:59:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:59:50,054 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 07:59:50,057 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 07:59:50,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:59:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:59:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 07:59:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:59:51,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-08-30 07:59:52,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 07:59:52,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:59:52,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-08-30 07:59:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:59:52,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:59:53,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 07:59:53,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:59:53,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-30 07:59:53,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 07:59:53,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 131 [2023-08-30 08:00:20,607 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~next~0 4294967296))) (let ((.cse2 (mod (+ c_~first~0 1) 4294967296)) (.cse1 (+ .cse0 |c_~#buffer~0.offset|))) (or (and (< 2147483647 .cse0) (< .cse1 4294967296)) (and (< (+ |c_~#buffer~0.offset| .cse2) 4294967296) (< 2147483647 .cse2)) (let ((.cse9 (mod (+ c_~next~0 1) 4294967296)) (.cse5 (+ |c_t1Thread1of1ForFork0_~i~0#1| 1))) (let ((.cse6 (mod .cse5 256)) (.cse7 (and (forall ((aux_mod_aux_mod_~buffer_size~0_31_42 Int) (aux_div_aux_mod_~buffer_size~0_31_42 Int)) (let ((.cse13 (+ (* aux_div_aux_mod_~buffer_size~0_31_42 4294967296) aux_mod_aux_mod_~buffer_size~0_31_42)) (.cse14 (mod (mod .cse9 (mod aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)) 4294967296))) (or (<= .cse13 (mod (mod .cse9 .cse13) 4294967296)) (< 2147483647 .cse14) (<= 4294967296 .cse13) (<= .cse14 0) (<= aux_mod_aux_mod_~buffer_size~0_31_42 .cse0) (>= aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)))) (forall ((aux_mod_aux_mod_~buffer_size~0_31_42 Int) (aux_div_aux_mod_~buffer_size~0_31_42 Int)) (let ((.cse15 (+ (* aux_div_aux_mod_~buffer_size~0_31_42 4294967296) aux_mod_aux_mod_~buffer_size~0_31_42)) (.cse16 (mod (mod .cse9 (mod aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)) 4294967296))) (or (<= .cse15 (mod (mod .cse9 .cse15) 4294967296)) (<= 4294967296 .cse15) (<= .cse16 0) (< (+ |c_~#buffer~0.offset| .cse16) 4294967296) (<= aux_mod_aux_mod_~buffer_size~0_31_42 .cse0) (>= aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)))))) (.cse3 (forall ((aux_mod_aux_mod_~buffer_size~0_31_42 Int) (aux_div_aux_mod_~buffer_size~0_31_42 Int)) (let ((.cse11 (+ (* aux_div_aux_mod_~buffer_size~0_31_42 4294967296) aux_mod_aux_mod_~buffer_size~0_31_42)) (.cse12 (mod (mod .cse9 (mod aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)) 4294967296))) (or (<= .cse11 (mod (mod .cse9 .cse11) 4294967296)) (< 2147483647 .cse12) (<= 4294967296 .cse11) (<= .cse12 0) (<= aux_mod_aux_mod_~buffer_size~0_31_42 .cse0) (>= aux_mod_aux_mod_~buffer_size~0_31_42 4294967296) (= .cse12 .cse2))))) (.cse4 (forall ((aux_mod_aux_mod_~buffer_size~0_31_42 Int) (aux_div_aux_mod_~buffer_size~0_31_42 Int)) (let ((.cse8 (+ (* aux_div_aux_mod_~buffer_size~0_31_42 4294967296) aux_mod_aux_mod_~buffer_size~0_31_42)) (.cse10 (mod (mod .cse9 (mod aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)) 4294967296))) (or (<= .cse8 (mod (mod .cse9 .cse8) 4294967296)) (<= 4294967296 .cse8) (<= .cse10 0) (< (+ |c_~#buffer~0.offset| .cse10) 4294967296) (<= aux_mod_aux_mod_~buffer_size~0_31_42 .cse0) (>= aux_mod_aux_mod_~buffer_size~0_31_42 4294967296) (= .cse10 .cse2)))))) (and (or (and .cse3 .cse4 (or (= .cse5 .cse6) .cse7)) (< 127 .cse6)) (or (<= .cse6 127) (and (or (= .cse6 (+ 257 |c_t1Thread1of1ForFork0_~i~0#1|)) .cse7) .cse3 .cse4))))) (< .cse1 0) (let ((.cse18 (mod c_~first~0 4294967296))) (let ((.cse17 (+ |c_~#buffer~0.offset| .cse18))) (and (< .cse17 4294967296) (or (< 2147483647 .cse18) (< .cse17 0))))) (<= 6 |c_t1Thread1of1ForFork0_~i~0#1|)))) is different from true [2023-08-30 08:01:29,692 WARN L222 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:01:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 08:01:33,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 08:01:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75940184] [2023-08-30 08:01:33,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 08:01:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987381131] [2023-08-30 08:01:33,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987381131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 08:01:33,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 08:01:33,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2023-08-30 08:01:33,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114798891] [2023-08-30 08:01:33,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 08:01:33,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 08:01:33,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 08:01:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 08:01:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=702, Unknown=2, NotChecked=54, Total=870 [2023-08-30 08:01:40,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 314 [2023-08-30 08:01:40,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 283 transitions, 2916 flow. Second operand has 30 states, 30 states have (on average 94.86666666666666) internal successors, (2846), 30 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 08:01:40,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 08:01:40,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 314 [2023-08-30 08:01:40,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 08:02:11,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:13,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:20,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:35,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:42,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:45,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:48,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:51,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:02:58,626 WARN L222 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 134 DAG size of output: 128 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:03:11,940 WARN L222 SmtUtils]: Spent 11.59s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:03:30,588 WARN L222 SmtUtils]: Spent 17.35s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:03:33,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:04:05,825 WARN L222 SmtUtils]: Spent 29.87s on a formula simplification. DAG size of input: 137 DAG size of output: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:04:12,528 WARN L222 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 112 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:04:14,611 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_~next~0 4294967296))) (let ((.cse35 (+ .cse5 |c_~#buffer~0.offset|))) (let ((.cse15 (mod c_~first~0 4294967296)) (.cse23 (< .cse35 4294967296)) (.cse22 (< 2147483647 .cse5)) (.cse25 (< .cse35 0)) (.cse19 (mod (+ c_~first~0 1) 4294967296)) (.cse34 (mod |c_t1Thread1of1ForFork0_~i~0#1| 256)) (.cse31 (mod c_~buffer_size~0 4294967296))) (let ((.cse12 (< .cse31 2)) (.cse17 (mod (+ c_~next~0 1) 4294967296)) (.cse3 (< 127 .cse34)) (.cse4 (= .cse34 |c_t1Thread1of1ForFork0_~i~0#1|)) (.cse1 (= .cse34 (+ 256 |c_t1Thread1of1ForFork0_~i~0#1|))) (.cse0 (<= .cse34 127)) (.cse7 (<= 7 |c_t1Thread1of1ForFork0_~i~0#1|)) (.cse10 (<= .cse31 .cse5)) (.cse24 (and (< (+ |c_~#buffer~0.offset| .cse19) 4294967296) (< 2147483647 .cse19))) (.cse11 (and .cse23 (or .cse22 .cse25))) (.cse13 (let ((.cse33 (+ |c_~#buffer~0.offset| .cse15))) (and (< .cse33 4294967296) (or (< 2147483647 .cse15) (< .cse33 0)))))) (and (let ((.cse6 (mod (+ |c_t2Thread1of1ForFork1_removeLogElement_#t~post1#1| 1) 4294967296))) (or (let ((.cse2 (= .cse5 .cse6))) (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse4 .cse2)))) .cse7 (let ((.cse9 (mod |c_t2Thread1of1ForFork1_removeLogElement_#t~post1#1| 4294967296))) (let ((.cse8 (+ |c_~#buffer~0.offset| .cse9))) (and (or (< .cse8 0) (< 2147483647 .cse9)) (< .cse8 4294967296)))) .cse10 (and (< 2147483647 .cse6) (< (+ |c_~#buffer~0.offset| .cse6) 4294967296)) .cse11 .cse12)) (or .cse10 .cse11 .cse13 .cse12 (let ((.cse14 (= .cse5 .cse15))) (and (or .cse3 (and .cse14 .cse4)) (or (and .cse14 .cse1) .cse0)))) (or (and (forall ((aux_mod_aux_mod_~buffer_size~0_31_42 Int) (aux_div_aux_mod_~buffer_size~0_31_42 Int)) (let ((.cse16 (+ (* aux_div_aux_mod_~buffer_size~0_31_42 4294967296) aux_mod_aux_mod_~buffer_size~0_31_42)) (.cse18 (mod (mod .cse17 (mod aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)) 4294967296))) (or (<= .cse16 (mod (mod .cse17 .cse16) 4294967296)) (< 2147483647 .cse18) (<= 4294967296 .cse16) (<= .cse18 0) (<= aux_mod_aux_mod_~buffer_size~0_31_42 .cse5) (>= aux_mod_aux_mod_~buffer_size~0_31_42 4294967296) (= .cse18 .cse19)))) (forall ((aux_mod_aux_mod_~buffer_size~0_31_42 Int) (aux_div_aux_mod_~buffer_size~0_31_42 Int)) (let ((.cse20 (+ (* aux_div_aux_mod_~buffer_size~0_31_42 4294967296) aux_mod_aux_mod_~buffer_size~0_31_42)) (.cse21 (mod (mod .cse17 (mod aux_mod_aux_mod_~buffer_size~0_31_42 4294967296)) 4294967296))) (or (<= .cse20 (mod (mod .cse17 .cse20) 4294967296)) (<= 4294967296 .cse20) (<= .cse21 0) (< (+ |c_~#buffer~0.offset| .cse21) 4294967296) (<= aux_mod_aux_mod_~buffer_size~0_31_42 .cse5) (>= aux_mod_aux_mod_~buffer_size~0_31_42 4294967296) (= .cse21 .cse19))))) (and .cse22 .cse23) .cse24 .cse25 .cse13) (let ((.cse27 (mod (mod .cse17 .cse31) 4294967296))) (or .cse24 (let ((.cse26 (+ |c_~#buffer~0.offset| .cse27))) (and (< .cse26 4294967296) (or (< .cse26 0) (< 2147483647 .cse27)))) (let ((.cse30 (+ |c_t1Thread1of1ForFork0_~i~0#1| 1))) (let ((.cse29 (= .cse19 .cse27)) (.cse28 (mod .cse30 256))) (and (or (<= .cse28 127) (and .cse29 (= .cse28 (+ 257 |c_t1Thread1of1ForFork0_~i~0#1|)))) (or (and .cse29 (= .cse30 .cse28)) (< 127 .cse28))))) (<= .cse31 .cse27) (<= .cse27 0) .cse13 (<= 6 |c_t1Thread1of1ForFork0_~i~0#1|))) (or (let ((.cse32 (= .cse5 .cse19))) (and (or .cse3 (and .cse4 .cse32)) (or (and .cse1 .cse32) .cse0))) .cse7 .cse10 .cse24 .cse11 .cse13 (<= .cse5 0))))))) is different from true [2023-08-30 08:04:21,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:04:32,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:04:37,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:05:00,132 WARN L222 SmtUtils]: Spent 18.61s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:05:09,282 WARN L222 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 79 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:05:25,182 WARN L222 SmtUtils]: Spent 13.98s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:05:36,252 WARN L222 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 132 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:06:02,079 WARN L222 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 136 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:06:13,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:06:26,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:06:27,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:06:33,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 08:06:36,336 INFO L130 PetriNetUnfolder]: 8011/16570 cut-off events. [2023-08-30 08:06:36,337 INFO L131 PetriNetUnfolder]: For 137246/137498 co-relation queries the response was YES. [2023-08-30 08:06:36,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80143 conditions, 16570 events. 8011/16570 cut-off events. For 137246/137498 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 125017 event pairs, 890 based on Foata normal form. 120/16516 useless extension candidates. Maximal degree in co-relation 80086. Up to 2901 conditions per place. [2023-08-30 08:06:36,429 INFO L137 encePairwiseOnDemand]: 291/314 looper letters, 468 selfloop transitions, 257 changer transitions 171/918 dead transitions. [2023-08-30 08:06:36,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 918 transitions, 9998 flow [2023-08-30 08:06:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-30 08:06:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-30 08:06:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6770 transitions. [2023-08-30 08:06:36,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170663169726489 [2023-08-30 08:06:36,439 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6770 transitions. [2023-08-30 08:06:36,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6770 transitions. [2023-08-30 08:06:36,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 08:06:36,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6770 transitions. [2023-08-30 08:06:36,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 99.55882352941177) internal successors, (6770), 68 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 08:06:36,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 314.0) internal successors, (21666), 69 states have internal predecessors, (21666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 08:06:36,469 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 314.0) internal successors, (21666), 69 states have internal predecessors, (21666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 08:06:36,469 INFO L175 Difference]: Start difference. First operand has 187 places, 283 transitions, 2916 flow. Second operand 68 states and 6770 transitions. [2023-08-30 08:06:36,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 918 transitions, 9998 flow [2023-08-30 08:06:36,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 918 transitions, 9685 flow, removed 151 selfloop flow, removed 2 redundant places. [2023-08-30 08:06:36,869 INFO L231 Difference]: Finished difference. Result has 274 places, 393 transitions, 4798 flow [2023-08-30 08:06:36,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4798, PETRI_PLACES=274, PETRI_TRANSITIONS=393} [2023-08-30 08:06:36,870 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 222 predicate places. [2023-08-30 08:06:36,871 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 393 transitions, 4798 flow [2023-08-30 08:06:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 94.86666666666666) internal successors, (2846), 30 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 08:06:36,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 08:06:36,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 08:06:36,885 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 08:06:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 08:06:37,080 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 08:06:37,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 08:06:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2125755086, now seen corresponding path program 3 times [2023-08-30 08:06:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 08:06:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123576887] [2023-08-30 08:06:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 08:06:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 08:06:37,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 08:06:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983043369] [2023-08-30 08:06:37,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 08:06:37,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 08:06:37,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 08:06:37,119 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 08:06:37,127 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 08:06:38,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 08:06:38,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 08:06:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 94 conjunts are in the unsatisfiable core [2023-08-30 08:06:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 08:06:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 08:06:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 08:06:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 08:06:38,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 08:06:38,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 08:06:38,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-30 08:06:38,616 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 08:06:38,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 08:06:38,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 08:06:38,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-08-30 08:06:39,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-08-30 08:06:39,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-08-30 08:06:40,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 08:06:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 08:06:40,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 08:07:57,613 WARN L222 SmtUtils]: Spent 54.13s on a formula simplification. DAG size of input: 282 DAG size of output: 172 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:08:54,052 WARN L222 SmtUtils]: Spent 46.08s on a formula simplification. DAG size of input: 165 DAG size of output: 137 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:09:42,202 WARN L222 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:09:59,719 WARN L222 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 08:10:19,858 WARN L222 SmtUtils]: Spent 12.95s on a formula simplification that was a NOOP. DAG size: 141 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15