./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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_bad.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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:27:06,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:27:06,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:27:06,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:27:06,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:27:06,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:27:06,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:27:06,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:27:06,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:27:06,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:27:06,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:27:06,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:27:06,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:27:06,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:27:06,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:27:06,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:27:06,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:27:06,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:27:06,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:27:06,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:27:06,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:27:06,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:27:06,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:27:06,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:27:06,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:27:06,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:27:06,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:27:06,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:27:06,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:27:06,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:27:06,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:27:06,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:27:06,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:27:06,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:27:06,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:27:06,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:27:06,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:27:06,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:27:06,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:27:06,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:27:06,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:27:06,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 04:27:06,659 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:27:06,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:27:06,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:27:06,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:27:06,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:27:06,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:27:06,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:27:06,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:27:06,662 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:27:06,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:27:06,663 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:27:06,664 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:27:06,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:27:06,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:27:06,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:27:06,664 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:27:06,665 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:27:06,665 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:27:06,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:27:06,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:27:06,665 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:27:06,665 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:27:06,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:27:06,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:27:06,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:27:06,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:27:06,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:27:06,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:27:06,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:27:06,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:27:06,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:27:06,668 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:27:06,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:27:06,668 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:27:06,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:27:06,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:27:07,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:27:07,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:27:07,021 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:27:07,022 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:27:07,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-09-01 04:27:08,339 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:27:08,590 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:27:08,591 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-09-01 04:27:08,605 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7165f619/f24c1aa03a584386bbba467ea1449f4f/FLAG345f3dd3a [2023-09-01 04:27:08,622 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7165f619/f24c1aa03a584386bbba467ea1449f4f [2023-09-01 04:27:08,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:27:08,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:27:08,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:27:08,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:27:08,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:27:08,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:27:08" (1/1) ... [2023-09-01 04:27:08,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67cbc25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:08, skipping insertion in model container [2023-09-01 04:27:08,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:27:08" (1/1) ... [2023-09-01 04:27:08,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:27:08,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:27:08,980 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_bad.i[30440,30453] [2023-09-01 04:27:08,992 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_bad.i[30895,30908] [2023-09-01 04:27:09,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:27:09,018 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:27:09,054 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_bad.i[30440,30453] [2023-09-01 04:27:09,057 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_bad.i[30895,30908] [2023-09-01 04:27:09,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:27:09,098 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:27:09,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09 WrapperNode [2023-09-01 04:27:09,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:27:09,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:27:09,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:27:09,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:27:09,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,178 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2023-09-01 04:27:09,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:27:09,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:27:09,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:27:09,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:27:09,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,233 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:27:09,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:27:09,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:27:09,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:27:09,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (1/1) ... [2023-09-01 04:27:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:27:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:09,283 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) [2023-09-01 04:27:09,304 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 [2023-09-01 04:27:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:27:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 04:27:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 04:27:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 04:27:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 04:27:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:27:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 04:27:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:27:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:27:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:27:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 04:27:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:27:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:27:09,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:27:09,326 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:27:09,492 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:27:09,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:27:09,734 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:27:09,741 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:27:09,742 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 04:27:09,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:27:09 BoogieIcfgContainer [2023-09-01 04:27:09,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:27:09,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:27:09,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:27:09,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:27:09,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:27:08" (1/3) ... [2023-09-01 04:27:09,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e88a6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:27:09, skipping insertion in model container [2023-09-01 04:27:09,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:09" (2/3) ... [2023-09-01 04:27:09,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e88a6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:27:09, skipping insertion in model container [2023-09-01 04:27:09,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:27:09" (3/3) ... [2023-09-01 04:27:09,751 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-09-01 04:27:09,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:27:09,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-09-01 04:27:09,769 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:27:09,930 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:27:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 156 transitions, 328 flow [2023-09-01 04:27:10,018 INFO L130 PetriNetUnfolder]: 10/154 cut-off events. [2023-09-01 04:27:10,018 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:27:10,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 154 events. 10/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 316 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-09-01 04:27:10,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 156 transitions, 328 flow [2023-09-01 04:27:10,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 150 transitions, 312 flow [2023-09-01 04:27:10,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:27:10,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 150 transitions, 312 flow [2023-09-01 04:27:10,045 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 150 transitions, 312 flow [2023-09-01 04:27:10,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 312 flow [2023-09-01 04:27:10,078 INFO L130 PetriNetUnfolder]: 10/150 cut-off events. [2023-09-01 04:27:10,078 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:27:10,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 150 events. 10/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 313 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-09-01 04:27:10,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 4828 [2023-09-01 04:27:16,188 INFO L134 LiptonReduction]: Checked pairs total: 12000 [2023-09-01 04:27:16,188 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-09-01 04:27:16,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:27:16,214 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;@2233190d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:27:16,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-09-01 04:27:16,216 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 04:27:16,216 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:27:16,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:16,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 04:27:16,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:16,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 613, now seen corresponding path program 1 times [2023-09-01 04:27:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:16,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811960709] [2023-09-01 04:27:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811960709] [2023-09-01 04:27:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811960709] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:16,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:16,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 04:27:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11496746] [2023-09-01 04:27:16,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 04:27:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 04:27:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 04:27:16,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 299 [2023-09-01 04:27:16,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:16,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:16,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 299 [2023-09-01 04:27:16,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:16,684 INFO L130 PetriNetUnfolder]: 1273/2001 cut-off events. [2023-09-01 04:27:16,684 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 04:27:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 2001 events. 1273/2001 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 9707 event pairs, 1001 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 3697. Up to 1885 conditions per place. [2023-09-01 04:27:16,701 INFO L137 encePairwiseOnDemand]: 297/299 looper letters, 41 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-09-01 04:27:16,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 184 flow [2023-09-01 04:27:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 04:27:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 04:27:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 335 transitions. [2023-09-01 04:27:16,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560200668896321 [2023-09-01 04:27:16,715 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 335 transitions. [2023-09-01 04:27:16,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 335 transitions. [2023-09-01 04:27:16,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:16,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 335 transitions. [2023-09-01 04:27:16,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:16,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:16,726 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:16,728 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 106 flow. Second operand 2 states and 335 transitions. [2023-09-01 04:27:16,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 184 flow [2023-09-01 04:27:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:27:16,734 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 94 flow [2023-09-01 04:27:16,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-09-01 04:27:16,738 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-09-01 04:27:16,738 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 94 flow [2023-09-01 04:27:16,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:16,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:16,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:27:16,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:27:16,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:16,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash 602244, now seen corresponding path program 1 times [2023-09-01 04:27:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347552590] [2023-09-01 04:27:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:16,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347552590] [2023-09-01 04:27:16,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347552590] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:16,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:16,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:27:16,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604262945] [2023-09-01 04:27:16,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:16,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:16,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 299 [2023-09-01 04:27:16,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:16,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:16,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 299 [2023-09-01 04:27:16,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:17,153 INFO L130 PetriNetUnfolder]: 1245/1948 cut-off events. [2023-09-01 04:27:17,153 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 04:27:17,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 1948 events. 1245/1948 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9376 event pairs, 979 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 3795. Up to 1833 conditions per place. [2023-09-01 04:27:17,165 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 37 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-09-01 04:27:17,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 168 flow [2023-09-01 04:27:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-09-01 04:27:17,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039018952062431 [2023-09-01 04:27:17,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-09-01 04:27:17,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-09-01 04:27:17,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:17,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-09-01 04:27:17,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,187 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 94 flow. Second operand 3 states and 452 transitions. [2023-09-01 04:27:17,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 168 flow [2023-09-01 04:27:17,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:27:17,190 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 94 flow [2023-09-01 04:27:17,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=90, 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=94, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-09-01 04:27:17,190 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-09-01 04:27:17,191 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 94 flow [2023-09-01 04:27:17,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:17,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:27:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:27:17,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:17,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash 602246, now seen corresponding path program 1 times [2023-09-01 04:27:17,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:17,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849703578] [2023-09-01 04:27:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:17,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849703578] [2023-09-01 04:27:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849703578] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:17,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:17,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:27:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583585823] [2023-09-01 04:27:17,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:17,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 299 [2023-09-01 04:27:17,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:17,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 299 [2023-09-01 04:27:17,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:17,550 INFO L130 PetriNetUnfolder]: 1217/1895 cut-off events. [2023-09-01 04:27:17,551 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 04:27:17,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 1895 events. 1217/1895 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9016 event pairs, 957 based on Foata normal form. 0/1002 useless extension candidates. Maximal degree in co-relation 3694. Up to 1783 conditions per place. [2023-09-01 04:27:17,562 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 35 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-09-01 04:27:17,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 164 flow [2023-09-01 04:27:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-09-01 04:27:17,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150501672240803 [2023-09-01 04:27:17,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-09-01 04:27:17,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-09-01 04:27:17,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:17,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-09-01 04:27:17,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,570 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 94 flow. Second operand 3 states and 462 transitions. [2023-09-01 04:27:17,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 164 flow [2023-09-01 04:27:17,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:17,572 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 90 flow [2023-09-01 04:27:17,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-09-01 04:27:17,573 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-09-01 04:27:17,573 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 90 flow [2023-09-01 04:27:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:17,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:27:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 04:27:17,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:17,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash 578747449, now seen corresponding path program 1 times [2023-09-01 04:27:17,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118557285] [2023-09-01 04:27:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:17,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118557285] [2023-09-01 04:27:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118557285] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:17,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:27:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400769124] [2023-09-01 04:27:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:17,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:17,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 299 [2023-09-01 04:27:17,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:17,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 299 [2023-09-01 04:27:17,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:17,912 INFO L130 PetriNetUnfolder]: 1040/1618 cut-off events. [2023-09-01 04:27:17,913 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 04:27:17,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3151 conditions, 1618 events. 1040/1618 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7377 event pairs, 800 based on Foata normal form. 0/911 useless extension candidates. Maximal degree in co-relation 3147. Up to 1514 conditions per place. [2023-09-01 04:27:17,922 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-09-01 04:27:17,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 156 flow [2023-09-01 04:27:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-09-01 04:27:17,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061315496098104 [2023-09-01 04:27:17,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-09-01 04:27:17,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-09-01 04:27:17,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:17,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-09-01 04:27:17,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 04:27:17,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,930 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 90 flow. Second operand 3 states and 454 transitions. [2023-09-01 04:27:17,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 156 flow [2023-09-01 04:27:17,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:17,931 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 86 flow [2023-09-01 04:27:17,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-09-01 04:27:17,932 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-09-01 04:27:17,932 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 86 flow [2023-09-01 04:27:17,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:17,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:17,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:27:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 04:27:17,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:17,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash 578747450, now seen corresponding path program 1 times [2023-09-01 04:27:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:17,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018243696] [2023-09-01 04:27:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:17,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:18,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:18,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018243696] [2023-09-01 04:27:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018243696] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:18,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:18,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:27:18,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482598938] [2023-09-01 04:27:18,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:18,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:18,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 299 [2023-09-01 04:27:18,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:18,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 299 [2023-09-01 04:27:18,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:18,415 INFO L130 PetriNetUnfolder]: 1532/2422 cut-off events. [2023-09-01 04:27:18,416 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 04:27:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4706 conditions, 2422 events. 1532/2422 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11125 event pairs, 527 based on Foata normal form. 0/1385 useless extension candidates. Maximal degree in co-relation 4702. Up to 1396 conditions per place. [2023-09-01 04:27:18,428 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 59 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-09-01 04:27:18,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 269 flow [2023-09-01 04:27:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-09-01 04:27:18,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473801560758083 [2023-09-01 04:27:18,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-09-01 04:27:18,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-09-01 04:27:18,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:18,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-09-01 04:27:18,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,436 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 86 flow. Second operand 3 states and 491 transitions. [2023-09-01 04:27:18,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 269 flow [2023-09-01 04:27:18,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 66 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:18,439 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 105 flow [2023-09-01 04:27:18,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2023-09-01 04:27:18,442 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-09-01 04:27:18,443 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 105 flow [2023-09-01 04:27:18,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:18,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:27:18,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 04:27:18,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:18,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash 578771449, now seen corresponding path program 1 times [2023-09-01 04:27:18,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:18,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340772549] [2023-09-01 04:27:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:18,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:18,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340772549] [2023-09-01 04:27:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340772549] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:18,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:18,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:27:18,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674543941] [2023-09-01 04:27:18,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:18,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:27:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:27:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:27:18,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 299 [2023-09-01 04:27:18,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 105 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) [2023-09-01 04:27:18,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:18,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 299 [2023-09-01 04:27:18,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:18,784 INFO L130 PetriNetUnfolder]: 1169/1858 cut-off events. [2023-09-01 04:27:18,784 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-09-01 04:27:18,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3874 conditions, 1858 events. 1169/1858 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8305 event pairs, 850 based on Foata normal form. 0/1213 useless extension candidates. Maximal degree in co-relation 3869. Up to 1711 conditions per place. [2023-09-01 04:27:18,794 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 34 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-09-01 04:27:18,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 175 flow [2023-09-01 04:27:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-09-01 04:27:18,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5039018952062431 [2023-09-01 04:27:18,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-09-01 04:27:18,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-09-01 04:27:18,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:18,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-09-01 04:27:18,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,801 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 105 flow. Second operand 3 states and 452 transitions. [2023-09-01 04:27:18,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 175 flow [2023-09-01 04:27:18,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:27:18,803 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 104 flow [2023-09-01 04:27:18,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-09-01 04:27:18,804 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-09-01 04:27:18,804 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 104 flow [2023-09-01 04:27:18,805 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) [2023-09-01 04:27:18,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:18,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:27:18,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 04:27:18,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:18,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash 578771450, now seen corresponding path program 1 times [2023-09-01 04:27:18,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:18,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618204278] [2023-09-01 04:27:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:18,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:18,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618204278] [2023-09-01 04:27:18,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618204278] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:18,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:18,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:27:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236152696] [2023-09-01 04:27:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:27:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:27:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:27:18,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 299 [2023-09-01 04:27:18,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:18,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:18,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 299 [2023-09-01 04:27:18,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:19,057 INFO L130 PetriNetUnfolder]: 751/1239 cut-off events. [2023-09-01 04:27:19,057 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 04:27:19,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 1239 events. 751/1239 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5299 event pairs, 531 based on Foata normal form. 0/916 useless extension candidates. Maximal degree in co-relation 2551. Up to 1136 conditions per place. [2023-09-01 04:27:19,063 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-09-01 04:27:19,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 172 flow [2023-09-01 04:27:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-09-01 04:27:19,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48272017837235226 [2023-09-01 04:27:19,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-09-01 04:27:19,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-09-01 04:27:19,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:19,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-09-01 04:27:19,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,070 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 104 flow. Second operand 3 states and 433 transitions. [2023-09-01 04:27:19,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 172 flow [2023-09-01 04:27:19,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:19,072 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 102 flow [2023-09-01 04:27:19,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-09-01 04:27:19,072 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2023-09-01 04:27:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 102 flow [2023-09-01 04:27:19,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:19,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 04:27:19,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:19,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2125511983, now seen corresponding path program 1 times [2023-09-01 04:27:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:19,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429552597] [2023-09-01 04:27:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:19,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:19,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396875699] [2023-09-01 04:27:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:19,097 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) [2023-09-01 04:27:19,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 04:27:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:27:19,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:19,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:27:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429552597] [2023-09-01 04:27:19,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:27:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396875699] [2023-09-01 04:27:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396875699] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:19,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:19,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:27:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431044392] [2023-09-01 04:27:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:19,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:19,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:19,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 299 [2023-09-01 04:27:19,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:19,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 299 [2023-09-01 04:27:19,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:19,395 INFO L130 PetriNetUnfolder]: 692/1154 cut-off events. [2023-09-01 04:27:19,395 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 04:27:19,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341 conditions, 1154 events. 692/1154 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4927 event pairs, 502 based on Foata normal form. 0/883 useless extension candidates. Maximal degree in co-relation 2336. Up to 1057 conditions per place. [2023-09-01 04:27:19,417 INFO L137 encePairwiseOnDemand]: 297/299 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-09-01 04:27:19,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 160 flow [2023-09-01 04:27:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-09-01 04:27:19,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083612040133779 [2023-09-01 04:27:19,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-09-01 04:27:19,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-09-01 04:27:19,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:19,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-09-01 04:27:19,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 04:27:19,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,423 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 102 flow. Second operand 3 states and 456 transitions. [2023-09-01 04:27:19,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 160 flow [2023-09-01 04:27:19,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:19,425 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 92 flow [2023-09-01 04:27:19,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-09-01 04:27:19,425 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -10 predicate places. [2023-09-01 04:27:19,426 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 92 flow [2023-09-01 04:27:19,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:19,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:19,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 04:27:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:19,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:19,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1068682424, now seen corresponding path program 1 times [2023-09-01 04:27:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:19,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828449018] [2023-09-01 04:27:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:19,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828449018] [2023-09-01 04:27:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828449018] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:19,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:19,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:27:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618755953] [2023-09-01 04:27:19,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:19,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:19,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:19,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 299 [2023-09-01 04:27:19,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 92 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) [2023-09-01 04:27:19,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:19,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 299 [2023-09-01 04:27:19,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:19,880 INFO L130 PetriNetUnfolder]: 1038/1734 cut-off events. [2023-09-01 04:27:19,880 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-09-01 04:27:19,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3579 conditions, 1734 events. 1038/1734 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7757 event pairs, 374 based on Foata normal form. 0/1356 useless extension candidates. Maximal degree in co-relation 3574. Up to 1077 conditions per place. [2023-09-01 04:27:19,895 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 55 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-09-01 04:27:19,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 265 flow [2023-09-01 04:27:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-09-01 04:27:19,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351170568561873 [2023-09-01 04:27:19,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-09-01 04:27:19,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-09-01 04:27:19,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:19,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-09-01 04:27:19,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,902 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 92 flow. Second operand 3 states and 480 transitions. [2023-09-01 04:27:19,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 265 flow [2023-09-01 04:27:19,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:27:19,905 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 106 flow [2023-09-01 04:27:19,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-09-01 04:27:19,907 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2023-09-01 04:27:19,907 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 106 flow [2023-09-01 04:27:19,908 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) [2023-09-01 04:27:19,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:19,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 04:27:19,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:19,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1521778597, now seen corresponding path program 1 times [2023-09-01 04:27:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636746661] [2023-09-01 04:27:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:19,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636746661] [2023-09-01 04:27:19,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636746661] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:19,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:19,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:27:19,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201908456] [2023-09-01 04:27:19,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:19,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:19,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:19,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 299 [2023-09-01 04:27:19,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:19,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:19,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 299 [2023-09-01 04:27:19,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:20,197 INFO L130 PetriNetUnfolder]: 1240/2139 cut-off events. [2023-09-01 04:27:20,197 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-09-01 04:27:20,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4492 conditions, 2139 events. 1240/2139 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11085 event pairs, 583 based on Foata normal form. 0/1781 useless extension candidates. Maximal degree in co-relation 4486. Up to 1649 conditions per place. [2023-09-01 04:27:20,206 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-09-01 04:27:20,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 61 transitions, 276 flow [2023-09-01 04:27:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-09-01 04:27:20,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373467112597548 [2023-09-01 04:27:20,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-09-01 04:27:20,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-09-01 04:27:20,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:20,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-09-01 04:27:20,211 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) [2023-09-01 04:27:20,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,214 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 106 flow. Second operand 3 states and 482 transitions. [2023-09-01 04:27:20,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 61 transitions, 276 flow [2023-09-01 04:27:20,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:27:20,216 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 115 flow [2023-09-01 04:27:20,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-09-01 04:27:20,217 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-09-01 04:27:20,217 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 115 flow [2023-09-01 04:27:20,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:20,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 04:27:20,218 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:20,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1044525960, now seen corresponding path program 1 times [2023-09-01 04:27:20,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:20,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669110770] [2023-09-01 04:27:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:20,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:20,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:20,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116339327] [2023-09-01 04:27:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:20,234 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) [2023-09-01 04:27:20,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 04:27:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:27:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:20,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:27:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:20,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669110770] [2023-09-01 04:27:20,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:27:20,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116339327] [2023-09-01 04:27:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116339327] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 04:27:20,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 04:27:20,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-09-01 04:27:20,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999224093] [2023-09-01 04:27:20,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:20,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:20,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:20,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 04:27:20,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 299 [2023-09-01 04:27:20,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:20,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 299 [2023-09-01 04:27:20,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:20,579 INFO L130 PetriNetUnfolder]: 938/1687 cut-off events. [2023-09-01 04:27:20,579 INFO L131 PetriNetUnfolder]: For 279/279 co-relation queries the response was YES. [2023-09-01 04:27:20,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 1687 events. 938/1687 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8368 event pairs, 299 based on Foata normal form. 32/1547 useless extension candidates. Maximal degree in co-relation 3713. Up to 1001 conditions per place. [2023-09-01 04:27:20,588 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 48 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-09-01 04:27:20,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 259 flow [2023-09-01 04:27:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-09-01 04:27:20,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5250836120401338 [2023-09-01 04:27:20,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-09-01 04:27:20,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-09-01 04:27:20,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:20,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-09-01 04:27:20,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,594 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 115 flow. Second operand 3 states and 471 transitions. [2023-09-01 04:27:20,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 259 flow [2023-09-01 04:27:20,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:20,597 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 130 flow [2023-09-01 04:27:20,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-09-01 04:27:20,598 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2023-09-01 04:27:20,598 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 130 flow [2023-09-01 04:27:20,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:20,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:20,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:20,805 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,SelfDestructingSolverStorable10 [2023-09-01 04:27:20,805 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:20,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash 123379365, now seen corresponding path program 1 times [2023-09-01 04:27:20,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:20,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676692798] [2023-09-01 04:27:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:20,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:20,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:20,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676692798] [2023-09-01 04:27:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676692798] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:20,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:20,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:27:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689968993] [2023-09-01 04:27:20,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:20,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 299 [2023-09-01 04:27:20,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:20,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:20,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 299 [2023-09-01 04:27:20,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:21,038 INFO L130 PetriNetUnfolder]: 894/1601 cut-off events. [2023-09-01 04:27:21,038 INFO L131 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2023-09-01 04:27:21,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 1601 events. 894/1601 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7651 event pairs, 268 based on Foata normal form. 44/1573 useless extension candidates. Maximal degree in co-relation 3772. Up to 942 conditions per place. [2023-09-01 04:27:21,046 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 45 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-09-01 04:27:21,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 262 flow [2023-09-01 04:27:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-09-01 04:27:21,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5206243032329989 [2023-09-01 04:27:21,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-09-01 04:27:21,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-09-01 04:27:21,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:21,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-09-01 04:27:21,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,052 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 130 flow. Second operand 3 states and 467 transitions. [2023-09-01 04:27:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 262 flow [2023-09-01 04:27:21,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:21,055 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 130 flow [2023-09-01 04:27:21,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-09-01 04:27:21,056 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2023-09-01 04:27:21,056 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 130 flow [2023-09-01 04:27:21,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:21,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 04:27:21,057 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:21,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1503569372, now seen corresponding path program 1 times [2023-09-01 04:27:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982393313] [2023-09-01 04:27:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:21,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982393313] [2023-09-01 04:27:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982393313] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:21,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:21,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:27:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327553706] [2023-09-01 04:27:21,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:21,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:21,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 299 [2023-09-01 04:27:21,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:21,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 299 [2023-09-01 04:27:21,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:21,322 INFO L130 PetriNetUnfolder]: 531/1010 cut-off events. [2023-09-01 04:27:21,323 INFO L131 PetriNetUnfolder]: For 224/228 co-relation queries the response was YES. [2023-09-01 04:27:21,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 1010 events. 531/1010 cut-off events. For 224/228 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4289 event pairs, 249 based on Foata normal form. 10/990 useless extension candidates. Maximal degree in co-relation 2431. Up to 611 conditions per place. [2023-09-01 04:27:21,327 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-09-01 04:27:21,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 299 flow [2023-09-01 04:27:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-09-01 04:27:21,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261984392419174 [2023-09-01 04:27:21,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-09-01 04:27:21,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-09-01 04:27:21,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:21,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-09-01 04:27:21,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,333 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 130 flow. Second operand 3 states and 472 transitions. [2023-09-01 04:27:21,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 299 flow [2023-09-01 04:27:21,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 289 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 04:27:21,336 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 130 flow [2023-09-01 04:27:21,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-09-01 04:27:21,337 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-09-01 04:27:21,337 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 130 flow [2023-09-01 04:27:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:21,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:21,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 04:27:21,338 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:21,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2042113087, now seen corresponding path program 1 times [2023-09-01 04:27:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:21,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777964706] [2023-09-01 04:27:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:21,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6817449] [2023-09-01 04:27:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:21,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:21,357 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) [2023-09-01 04:27:21,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 04:27:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 04:27:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:27:21,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:27:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:27:21,673 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 [2023-09-01 04:27:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:21,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:27:21,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:21,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777964706] [2023-09-01 04:27:21,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:27:21,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6817449] [2023-09-01 04:27:21,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6817449] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:21,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:21,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:27:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505142502] [2023-09-01 04:27:21,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 299 [2023-09-01 04:27:21,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:21,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:21,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 299 [2023-09-01 04:27:21,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:22,044 INFO L130 PetriNetUnfolder]: 802/1509 cut-off events. [2023-09-01 04:27:22,044 INFO L131 PetriNetUnfolder]: For 368/374 co-relation queries the response was YES. [2023-09-01 04:27:22,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1509 events. 802/1509 cut-off events. For 368/374 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6990 event pairs, 473 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 3494. Up to 866 conditions per place. [2023-09-01 04:27:22,050 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 59 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-09-01 04:27:22,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 335 flow [2023-09-01 04:27:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-09-01 04:27:22,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351170568561873 [2023-09-01 04:27:22,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-09-01 04:27:22,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-09-01 04:27:22,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:22,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-09-01 04:27:22,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,057 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 130 flow. Second operand 3 states and 480 transitions. [2023-09-01 04:27:22,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 335 flow [2023-09-01 04:27:22,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:22,062 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 138 flow [2023-09-01 04:27:22,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-09-01 04:27:22,063 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-09-01 04:27:22,063 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 138 flow [2023-09-01 04:27:22,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:22,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:22,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:22,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:22,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:22,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash -971513872, now seen corresponding path program 1 times [2023-09-01 04:27:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938226558] [2023-09-01 04:27:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:22,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938226558] [2023-09-01 04:27:22,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938226558] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:22,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:22,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:27:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24011833] [2023-09-01 04:27:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:22,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:27:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:27:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:27:22,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 299 [2023-09-01 04:27:22,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:22,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 299 [2023-09-01 04:27:22,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:22,594 INFO L130 PetriNetUnfolder]: 1117/2130 cut-off events. [2023-09-01 04:27:22,594 INFO L131 PetriNetUnfolder]: For 510/518 co-relation queries the response was YES. [2023-09-01 04:27:22,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 2130 events. 1117/2130 cut-off events. For 510/518 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11224 event pairs, 540 based on Foata normal form. 44/2136 useless extension candidates. Maximal degree in co-relation 4952. Up to 1430 conditions per place. [2023-09-01 04:27:22,601 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 60 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-09-01 04:27:22,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 352 flow [2023-09-01 04:27:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:27:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:27:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-09-01 04:27:22,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373467112597548 [2023-09-01 04:27:22,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-09-01 04:27:22,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-09-01 04:27:22,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:22,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-09-01 04:27:22,605 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) [2023-09-01 04:27:22,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,607 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 138 flow. Second operand 3 states and 482 transitions. [2023-09-01 04:27:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 352 flow [2023-09-01 04:27:22,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:27:22,609 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 148 flow [2023-09-01 04:27:22,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-09-01 04:27:22,610 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2023-09-01 04:27:22,610 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 148 flow [2023-09-01 04:27:22,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:22,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:22,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:22,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 04:27:22,610 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:22,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1951684401, now seen corresponding path program 1 times [2023-09-01 04:27:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917458930] [2023-09-01 04:27:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:22,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:22,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391066132] [2023-09-01 04:27:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:22,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:22,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:22,626 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) [2023-09-01 04:27:22,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 04:27:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:22,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 04:27:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:23,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:27:23,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:23,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917458930] [2023-09-01 04:27:23,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:27:23,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391066132] [2023-09-01 04:27:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391066132] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:23,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:27:23,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012353601] [2023-09-01 04:27:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:27:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:23,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:27:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:27:23,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-09-01 04:27:23,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:23,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:23,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-09-01 04:27:23,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:23,295 INFO L130 PetriNetUnfolder]: 867/1652 cut-off events. [2023-09-01 04:27:23,295 INFO L131 PetriNetUnfolder]: For 694/698 co-relation queries the response was YES. [2023-09-01 04:27:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4224 conditions, 1652 events. 867/1652 cut-off events. For 694/698 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7824 event pairs, 331 based on Foata normal form. 20/1638 useless extension candidates. Maximal degree in co-relation 4212. Up to 673 conditions per place. [2023-09-01 04:27:23,302 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 72 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-09-01 04:27:23,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 424 flow [2023-09-01 04:27:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:27:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:27:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-09-01 04:27:23,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083612040133779 [2023-09-01 04:27:23,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-09-01 04:27:23,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-09-01 04:27:23,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:23,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-09-01 04:27:23,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:23,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:23,309 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:23,309 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 148 flow. Second operand 4 states and 608 transitions. [2023-09-01 04:27:23,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 424 flow [2023-09-01 04:27:23,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:27:23,312 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 156 flow [2023-09-01 04:27:23,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-09-01 04:27:23,313 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-09-01 04:27:23,313 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 156 flow [2023-09-01 04:27:23,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:23,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:23,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:23,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:23,520 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,SelfDestructingSolverStorable15 [2023-09-01 04:27:23,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:23,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash 329361932, now seen corresponding path program 1 times [2023-09-01 04:27:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:23,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613673134] [2023-09-01 04:27:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:23,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:23,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:23,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370021770] [2023-09-01 04:27:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:23,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:23,539 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) [2023-09-01 04:27:23,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 04:27:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 04:27:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:27:23,793 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 [2023-09-01 04:27:23,809 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 04:27:23,810 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 [2023-09-01 04:27:23,840 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 [2023-09-01 04:27:23,936 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 [2023-09-01 04:27:24,146 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 59 treesize of output 53 [2023-09-01 04:27:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:24,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:27:24,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613673134] [2023-09-01 04:27:24,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:27:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370021770] [2023-09-01 04:27:24,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370021770] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:24,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:24,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:27:24,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983475121] [2023-09-01 04:27:24,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:24,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:27:24,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:27:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:27:24,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 299 [2023-09-01 04:27:24,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 156 flow. Second operand has 9 states, 9 states have (on average 126.77777777777777) internal successors, (1141), 9 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:24,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:24,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 299 [2023-09-01 04:27:24,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:25,335 INFO L130 PetriNetUnfolder]: 1358/2579 cut-off events. [2023-09-01 04:27:25,335 INFO L131 PetriNetUnfolder]: For 1155/1163 co-relation queries the response was YES. [2023-09-01 04:27:25,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6580 conditions, 2579 events. 1358/2579 cut-off events. For 1155/1163 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 14114 event pairs, 467 based on Foata normal form. 18/2551 useless extension candidates. Maximal degree in co-relation 6567. Up to 1038 conditions per place. [2023-09-01 04:27:25,349 INFO L137 encePairwiseOnDemand]: 287/299 looper letters, 119 selfloop transitions, 25 changer transitions 0/148 dead transitions. [2023-09-01 04:27:25,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 148 transitions, 814 flow [2023-09-01 04:27:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 04:27:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 04:27:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1513 transitions. [2023-09-01 04:27:25,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600182426269383 [2023-09-01 04:27:25,353 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1513 transitions. [2023-09-01 04:27:25,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1513 transitions. [2023-09-01 04:27:25,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:25,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1513 transitions. [2023-09-01 04:27:25,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 137.54545454545453) internal successors, (1513), 11 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:25,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:25,362 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:25,362 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 156 flow. Second operand 11 states and 1513 transitions. [2023-09-01 04:27:25,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 148 transitions, 814 flow [2023-09-01 04:27:25,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 148 transitions, 798 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:27:25,367 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 341 flow [2023-09-01 04:27:25,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=341, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2023-09-01 04:27:25,367 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2023-09-01 04:27:25,368 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 341 flow [2023-09-01 04:27:25,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 126.77777777777777) internal successors, (1141), 9 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:25,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:25,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:25,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:25,574 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,SelfDestructingSolverStorable16 [2023-09-01 04:27:25,575 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:25,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 755274700, now seen corresponding path program 2 times [2023-09-01 04:27:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:25,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360236043] [2023-09-01 04:27:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:25,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093767704] [2023-09-01 04:27:25,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:27:25,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:25,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:25,594 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) [2023-09-01 04:27:25,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 04:27:25,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:27:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:27:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 04:27:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:27:25,856 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 [2023-09-01 04:27:25,870 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 04:27:25,871 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 [2023-09-01 04:27:25,893 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 [2023-09-01 04:27:25,969 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 [2023-09-01 04:27:26,106 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 59 treesize of output 53 [2023-09-01 04:27:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:26,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:27:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:26,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360236043] [2023-09-01 04:27:26,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 04:27:26,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093767704] [2023-09-01 04:27:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093767704] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:27:26,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:27:26,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:27:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412138058] [2023-09-01 04:27:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:27:26,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:27:26,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:27:26,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:27:26,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 299 [2023-09-01 04:27:26,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 341 flow. Second operand has 9 states, 9 states have (on average 126.77777777777777) internal successors, (1141), 9 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:26,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:26,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 299 [2023-09-01 04:27:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:27,431 INFO L130 PetriNetUnfolder]: 1927/3640 cut-off events. [2023-09-01 04:27:27,431 INFO L131 PetriNetUnfolder]: For 3016/3049 co-relation queries the response was YES. [2023-09-01 04:27:27,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 3640 events. 1927/3640 cut-off events. For 3016/3049 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 20167 event pairs, 576 based on Foata normal form. 35/3649 useless extension candidates. Maximal degree in co-relation 10107. Up to 1052 conditions per place. [2023-09-01 04:27:27,457 INFO L137 encePairwiseOnDemand]: 287/299 looper letters, 140 selfloop transitions, 47 changer transitions 0/191 dead transitions. [2023-09-01 04:27:27,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 191 transitions, 1231 flow [2023-09-01 04:27:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 04:27:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 04:27:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1916 transitions. [2023-09-01 04:27:27,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577161968466316 [2023-09-01 04:27:27,464 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1916 transitions. [2023-09-01 04:27:27,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1916 transitions. [2023-09-01 04:27:27,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:27,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1916 transitions. [2023-09-01 04:27:27,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.85714285714286) internal successors, (1916), 14 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:27,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:27,488 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:27,489 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 341 flow. Second operand 14 states and 1916 transitions. [2023-09-01 04:27:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 191 transitions, 1231 flow [2023-09-01 04:27:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 191 transitions, 1229 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 04:27:27,499 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 649 flow [2023-09-01 04:27:27,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=649, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2023-09-01 04:27:27,499 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 35 predicate places. [2023-09-01 04:27:27,500 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 649 flow [2023-09-01 04:27:27,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 126.77777777777777) internal successors, (1141), 9 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:27,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:27,501 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] [2023-09-01 04:27:27,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:27,707 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,SelfDestructingSolverStorable17 [2023-09-01 04:27:27,707 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:27,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash 115207454, now seen corresponding path program 1 times [2023-09-01 04:27:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327513594] [2023-09-01 04:27:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:27,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 04:27:27,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327513594] [2023-09-01 04:27:27,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327513594] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 04:27:27,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399924910] [2023-09-01 04:27:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:27,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:27,768 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) [2023-09-01 04:27:27,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 04:27:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:27:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:27:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:27:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:27,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 04:27:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:27:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399924910] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 04:27:27,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 04:27:27,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-09-01 04:27:27,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750815712] [2023-09-01 04:27:27,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 04:27:27,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 04:27:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 04:27:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 04:27:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 04:27:27,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 299 [2023-09-01 04:27:27,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 649 flow. Second operand has 7 states, 7 states have (on average 145.85714285714286) internal successors, (1021), 7 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:27,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:27:27,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 299 [2023-09-01 04:27:27,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:27:28,865 INFO L130 PetriNetUnfolder]: 3730/7103 cut-off events. [2023-09-01 04:27:28,866 INFO L131 PetriNetUnfolder]: For 10632/10698 co-relation queries the response was YES. [2023-09-01 04:27:28,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21283 conditions, 7103 events. 3730/7103 cut-off events. For 10632/10698 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 45855 event pairs, 675 based on Foata normal form. 648/7697 useless extension candidates. Maximal degree in co-relation 21258. Up to 1798 conditions per place. [2023-09-01 04:27:28,915 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 202 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2023-09-01 04:27:28,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 220 transitions, 1969 flow [2023-09-01 04:27:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 04:27:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 04:27:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 965 transitions. [2023-09-01 04:27:28,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379041248606466 [2023-09-01 04:27:28,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 965 transitions. [2023-09-01 04:27:28,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 965 transitions. [2023-09-01 04:27:28,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:27:28,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 965 transitions. [2023-09-01 04:27:28,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.83333333333334) internal successors, (965), 6 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:28,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:28,924 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:28,925 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 649 flow. Second operand 6 states and 965 transitions. [2023-09-01 04:27:28,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 220 transitions, 1969 flow [2023-09-01 04:27:28,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 220 transitions, 1882 flow, removed 35 selfloop flow, removed 2 redundant places. [2023-09-01 04:27:28,967 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 667 flow [2023-09-01 04:27:28,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2023-09-01 04:27:28,967 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 42 predicate places. [2023-09-01 04:27:28,968 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 667 flow [2023-09-01 04:27:28,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 145.85714285714286) internal successors, (1021), 7 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:27:28,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:27:28,968 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] [2023-09-01 04:27:28,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:29,174 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:27:29,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:27:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -808092654, now seen corresponding path program 1 times [2023-09-01 04:27:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:27:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024695586] [2023-09-01 04:27:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:27:29,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 04:27:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009053039] [2023-09-01 04:27:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:27:29,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:29,198 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) [2023-09-01 04:27:29,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 04:27:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:27:29,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:27:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:27:29,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:27:29,620 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:27:29,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-09-01 04:27:29,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-09-01 04:27:29,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-09-01 04:27:29,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-09-01 04:27:29,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-09-01 04:27:29,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-09-01 04:27:29,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-09-01 04:27:29,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-09-01 04:27:29,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-09-01 04:27:29,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-09-01 04:27:29,624 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-09-01 04:27:29,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (5 of 23 remaining) [2023-09-01 04:27:29,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-09-01 04:27:29,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-09-01 04:27:29,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-09-01 04:27:29,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-09-01 04:27:29,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-09-01 04:27:29,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:27:29,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 04:27:29,833 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:27:29,838 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 04:27:29,838 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 04:27:29,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 04:27:29 BasicIcfg [2023-09-01 04:27:29,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 04:27:29,893 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 04:27:29,893 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 04:27:29,893 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 04:27:29,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:27:09" (3/4) ... [2023-09-01 04:27:29,896 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-09-01 04:27:29,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 04:27:29,897 INFO L158 Benchmark]: Toolchain (without parser) took 21271.80ms. Allocated memory was 90.2MB in the beginning and 329.3MB in the end (delta: 239.1MB). Free memory was 69.2MB in the beginning and 205.1MB in the end (delta: -135.9MB). Peak memory consumption was 102.3MB. Max. memory is 16.1GB. [2023-09-01 04:27:29,897 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 62.9MB. Free memory was 40.4MB in the beginning and 40.3MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:27:29,897 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.71ms. Allocated memory is still 90.2MB. Free memory was 69.2MB in the beginning and 48.7MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-09-01 04:27:29,897 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.35ms. Allocated memory is still 90.2MB. Free memory was 48.7MB in the beginning and 46.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:27:29,898 INFO L158 Benchmark]: Boogie Preprocessor took 64.51ms. Allocated memory is still 90.2MB. Free memory was 46.4MB in the beginning and 68.4MB in the end (delta: -22.0MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. [2023-09-01 04:27:29,898 INFO L158 Benchmark]: RCFGBuilder took 498.81ms. Allocated memory is still 90.2MB. Free memory was 68.4MB in the beginning and 49.1MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-09-01 04:27:29,898 INFO L158 Benchmark]: TraceAbstraction took 20146.60ms. Allocated memory was 90.2MB in the beginning and 329.3MB in the end (delta: 239.1MB). Free memory was 48.2MB in the beginning and 205.1MB in the end (delta: -156.9MB). Peak memory consumption was 82.0MB. Max. memory is 16.1GB. [2023-09-01 04:27:29,899 INFO L158 Benchmark]: Witness Printer took 3.46ms. Allocated memory is still 329.3MB. Free memory is still 205.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:27:29,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 62.9MB. Free memory was 40.4MB in the beginning and 40.3MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 473.71ms. Allocated memory is still 90.2MB. Free memory was 69.2MB in the beginning and 48.7MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.35ms. Allocated memory is still 90.2MB. Free memory was 48.7MB in the beginning and 46.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.51ms. Allocated memory is still 90.2MB. Free memory was 46.4MB in the beginning and 68.4MB in the end (delta: -22.0MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. * RCFGBuilder took 498.81ms. Allocated memory is still 90.2MB. Free memory was 68.4MB in the beginning and 49.1MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 20146.60ms. Allocated memory was 90.2MB in the beginning and 329.3MB in the end (delta: 239.1MB). Free memory was 48.2MB in the beginning and 205.1MB in the end (delta: -156.9MB). Peak memory consumption was 82.0MB. Max. memory is 16.1GB. * Witness Printer took 3.46ms. Allocated memory is still 329.3MB. Free memory is still 205.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.1s, 147 PlacesBefore, 48 PlacesAfterwards, 150 TransitionsBefore, 47 TransitionsAfterwards, 4828 CoEnabledTransitionPairs, 7 FixpointIterations, 56 TrivialSequentialCompositions, 71 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 143 TotalNumberOfCompositions, 12000 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7438, independent: 7127, independent conditional: 0, independent unconditional: 7127, dependent: 311, dependent conditional: 0, dependent unconditional: 311, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2709, independent: 2668, independent conditional: 0, independent unconditional: 2668, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7438, independent: 4459, independent conditional: 0, independent unconditional: 4459, dependent: 270, dependent conditional: 0, dependent unconditional: 270, unknown: 2709, unknown conditional: 0, unknown unconditional: 2709] , Statistics on independence cache: Total cache size (in pairs): 309, Positive cache size: 289, Positive conditional cache size: 0, Positive unconditional cache size: 289, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 746]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 746. Possible FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=1, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=2, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 219 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.9s, OverallIterations: 20, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2310 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1654 mSDsluCounter, 660 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 553 mSDsCounter, 154 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3602 IncrementalHoareTripleChecker+Invalid, 3756 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 154 mSolverCounterUnsat, 107 mSDtfsCounter, 3602 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=667occurred in iteration=19, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 248 NumberOfCodeBlocks, 248 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 238 ConstructedInterpolants, 18 QuantifiedInterpolants, 1671 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1547 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 22 InterpolantComputations, 18 PerfectInterpolantSequences, 6/11 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-09-01 04:27:29,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:27:31,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:27:31,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:27:31,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:27:31,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:27:31,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:27:31,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:27:31,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:27:31,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:27:31,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:27:31,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:27:31,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:27:31,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:27:31,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:27:31,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:27:31,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:27:31,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:27:31,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:27:31,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:27:31,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:27:31,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:27:31,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:27:31,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:27:31,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:27:31,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:27:31,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:27:31,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:27:31,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:27:31,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:27:31,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:27:31,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:27:31,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:27:31,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:27:31,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:27:31,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:27:31,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:27:31,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:27:31,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:27:31,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:27:31,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:27:31,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:27:31,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 04:27:31,930 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:27:31,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:27:31,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:27:31,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:27:31,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:27:31,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:27:31,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:27:31,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:27:31,933 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:27:31,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:27:31,934 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:27:31,935 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:27:31,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:27:31,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:27:31,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:27:31,935 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 04:27:31,936 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 04:27:31,936 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 04:27:31,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:27:31,936 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 04:27:31,936 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 04:27:31,937 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 04:27:31,937 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:27:31,937 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:27:31,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:27:31,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:27:31,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:27:31,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:27:31,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:27:31,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:27:31,939 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 04:27:31,939 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 04:27:31,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:27:31,939 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:27:31,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:27:31,940 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 04:27:31,940 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:27:31,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:27:32,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:27:32,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:27:32,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:27:32,278 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:27:32,278 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:27:32,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-09-01 04:27:33,429 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:27:33,722 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:27:33,727 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-09-01 04:27:33,738 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5600772bc/6d686c56b43a4e63a9b73e036ee2696a/FLAG2c9451d05 [2023-09-01 04:27:33,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5600772bc/6d686c56b43a4e63a9b73e036ee2696a [2023-09-01 04:27:33,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:27:33,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:27:33,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:27:33,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:27:33,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:27:33,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:27:33" (1/1) ... [2023-09-01 04:27:33,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e5ea28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:33, skipping insertion in model container [2023-09-01 04:27:33,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:27:33" (1/1) ... [2023-09-01 04:27:33,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:27:33,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:27:34,145 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_bad.i[30440,30453] [2023-09-01 04:27:34,162 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_bad.i[30895,30908] [2023-09-01 04:27:34,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:27:34,189 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:27:34,222 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_bad.i[30440,30453] [2023-09-01 04:27:34,225 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_bad.i[30895,30908] [2023-09-01 04:27:34,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:27:34,278 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:27:34,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34 WrapperNode [2023-09-01 04:27:34,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:27:34,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:27:34,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:27:34,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:27:34,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,358 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 134 [2023-09-01 04:27:34,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:27:34,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:27:34,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:27:34,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:27:34,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,403 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:27:34,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:27:34,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:27:34,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:27:34,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (1/1) ... [2023-09-01 04:27:34,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:27:34,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:27:34,467 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) [2023-09-01 04:27:34,483 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 [2023-09-01 04:27:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-09-01 04:27:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 04:27:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 04:27:34,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 04:27:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 04:27:34,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 04:27:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 04:27:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:27:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:27:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-09-01 04:27:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:27:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 04:27:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 04:27:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2023-09-01 04:27:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 04:27:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-09-01 04:27:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:27:34,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:27:34,508 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:27:34,689 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:27:34,691 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:27:35,069 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:27:35,079 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:27:35,080 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 04:27:35,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:27:35 BoogieIcfgContainer [2023-09-01 04:27:35,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:27:35,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:27:35,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:27:35,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:27:35,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:27:33" (1/3) ... [2023-09-01 04:27:35,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472be4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:27:35, skipping insertion in model container [2023-09-01 04:27:35,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:27:34" (2/3) ... [2023-09-01 04:27:35,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472be4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:27:35, skipping insertion in model container [2023-09-01 04:27:35,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:27:35" (3/3) ... [2023-09-01 04:27:35,099 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-09-01 04:27:35,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:27:35,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-09-01 04:27:35,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:27:35,242 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 04:27:35,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 155 transitions, 326 flow [2023-09-01 04:27:35,362 INFO L130 PetriNetUnfolder]: 10/153 cut-off events. [2023-09-01 04:27:35,363 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:27:35,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 10/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 302 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-09-01 04:27:35,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 155 transitions, 326 flow [2023-09-01 04:27:35,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 149 transitions, 310 flow [2023-09-01 04:27:35,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:27:35,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 149 transitions, 310 flow [2023-09-01 04:27:35,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 149 transitions, 310 flow [2023-09-01 04:27:35,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 149 transitions, 310 flow [2023-09-01 04:27:35,453 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2023-09-01 04:27:35,453 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:27:35,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 10/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 299 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-09-01 04:27:35,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 4628 [2023-09-01 04:28:27,527 INFO L134 LiptonReduction]: Checked pairs total: 12357 [2023-09-01 04:28:27,528 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-09-01 04:28:27,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 04:28:27,561 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;@74a78391, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:28:27,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-09-01 04:28:27,565 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 04:28:27,565 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:28:27,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:27,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 04:28:27,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:27,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash 608, now seen corresponding path program 1 times [2023-09-01 04:28:27,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:27,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491431112] [2023-09-01 04:28:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:27,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:27,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:27,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:27,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 04:28:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-09-01 04:28:27,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:27,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:27,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:27,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491431112] [2023-09-01 04:28:27,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491431112] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:27,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:27,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 04:28:27,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117643640] [2023-09-01 04:28:27,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:27,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 04:28:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 04:28:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 04:28:27,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 298 [2023-09-01 04:28:27,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 108 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:27,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:27,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 298 [2023-09-01 04:28:27,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:28,092 INFO L130 PetriNetUnfolder]: 1278/2073 cut-off events. [2023-09-01 04:28:28,093 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-09-01 04:28:28,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 2073 events. 1278/2073 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10440 event pairs, 994 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 3784. Up to 1894 conditions per place. [2023-09-01 04:28:28,109 INFO L137 encePairwiseOnDemand]: 296/298 looper letters, 41 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-09-01 04:28:28,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 186 flow [2023-09-01 04:28:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 04:28:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 04:28:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2023-09-01 04:28:28,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587248322147651 [2023-09-01 04:28:28,129 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2023-09-01 04:28:28,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2023-09-01 04:28:28,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:28,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2023-09-01 04:28:28,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:28,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:28,145 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:28,148 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 108 flow. Second operand 2 states and 333 transitions. [2023-09-01 04:28:28,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 186 flow [2023-09-01 04:28:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 04:28:28,154 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 96 flow [2023-09-01 04:28:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-09-01 04:28:28,161 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-09-01 04:28:28,161 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 96 flow [2023-09-01 04:28:28,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:28,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:28,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:28:28,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:28,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:28,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:28,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 597244, now seen corresponding path program 1 times [2023-09-01 04:28:28,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:28,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97788946] [2023-09-01 04:28:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:28,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:28,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:28,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:28,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 04:28:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:28:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:28,528 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-09-01 04:28:28,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2023-09-01 04:28:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:28,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:28,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:28,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97788946] [2023-09-01 04:28:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97788946] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:28,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:28,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:28,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090031290] [2023-09-01 04:28:28,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:28,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:28,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:28,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 298 [2023-09-01 04:28:28,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:28,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:28,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 298 [2023-09-01 04:28:28,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:30,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:28:30,938 INFO L130 PetriNetUnfolder]: 1250/2018 cut-off events. [2023-09-01 04:28:30,938 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:28:30,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 2018 events. 1250/2018 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10035 event pairs, 972 based on Foata normal form. 0/1126 useless extension candidates. Maximal degree in co-relation 3874. Up to 1841 conditions per place. [2023-09-01 04:28:30,949 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 37 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 04:28:30,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 170 flow [2023-09-01 04:28:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-09-01 04:28:30,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022371364653244 [2023-09-01 04:28:30,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-09-01 04:28:30,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-09-01 04:28:30,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:30,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-09-01 04:28:30,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 04:28:30,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:30,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:30,957 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 96 flow. Second operand 3 states and 449 transitions. [2023-09-01 04:28:30,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 170 flow [2023-09-01 04:28:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 04:28:30,959 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 96 flow [2023-09-01 04:28:30,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=92, 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=96, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-09-01 04:28:30,960 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-09-01 04:28:30,960 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 96 flow [2023-09-01 04:28:30,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:30,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:30,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 04:28:30,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:31,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:31,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:31,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash 597245, now seen corresponding path program 1 times [2023-09-01 04:28:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:31,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799947183] [2023-09-01 04:28:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:31,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:31,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:31,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 04:28:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:28:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:31,266 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 04:28:31,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-09-01 04:28:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:31,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:31,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:31,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799947183] [2023-09-01 04:28:31,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799947183] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:31,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:31,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:31,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544215898] [2023-09-01 04:28:31,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:31,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:31,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:31,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 298 [2023-09-01 04:28:31,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:31,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:31,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 298 [2023-09-01 04:28:31,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:31,669 INFO L130 PetriNetUnfolder]: 1222/1963 cut-off events. [2023-09-01 04:28:31,669 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:28:31,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 1963 events. 1222/1963 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9718 event pairs, 950 based on Foata normal form. 0/1106 useless extension candidates. Maximal degree in co-relation 3770. Up to 1790 conditions per place. [2023-09-01 04:28:31,679 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 35 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-09-01 04:28:31,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 166 flow [2023-09-01 04:28:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-09-01 04:28:31,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134228187919463 [2023-09-01 04:28:31,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-09-01 04:28:31,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-09-01 04:28:31,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:31,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-09-01 04:28:31,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 04:28:31,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:31,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:31,686 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 96 flow. Second operand 3 states and 459 transitions. [2023-09-01 04:28:31,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 166 flow [2023-09-01 04:28:31,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:31,691 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 92 flow [2023-09-01 04:28:31,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=92, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-09-01 04:28:31,695 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-09-01 04:28:31,696 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 92 flow [2023-09-01 04:28:31,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:31,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:31,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:31,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:31,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:31,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 573964460, now seen corresponding path program 1 times [2023-09-01 04:28:31,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:31,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301750280] [2023-09-01 04:28:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:31,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:31,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:31,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:31,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 04:28:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 04:28:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:32,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:32,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301750280] [2023-09-01 04:28:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301750280] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:32,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:32,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998192813] [2023-09-01 04:28:32,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:32,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 298 [2023-09-01 04:28:32,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:32,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:32,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 298 [2023-09-01 04:28:32,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:32,461 INFO L130 PetriNetUnfolder]: 895/1465 cut-off events. [2023-09-01 04:28:32,462 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:28:32,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1465 events. 895/1465 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6996 event pairs, 688 based on Foata normal form. 0/888 useless extension candidates. Maximal degree in co-relation 2815. Up to 1333 conditions per place. [2023-09-01 04:28:32,468 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 34 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-09-01 04:28:32,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 162 flow [2023-09-01 04:28:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-09-01 04:28:32,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011185682326622 [2023-09-01 04:28:32,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-09-01 04:28:32,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-09-01 04:28:32,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:32,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-09-01 04:28:32,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:32,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:32,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:32,475 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 92 flow. Second operand 3 states and 448 transitions. [2023-09-01 04:28:32,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 162 flow [2023-09-01 04:28:32,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:32,477 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 90 flow [2023-09-01 04:28:32,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-09-01 04:28:32,479 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-09-01 04:28:32,479 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 90 flow [2023-09-01 04:28:32,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:32,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:32,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:32,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-09-01 04:28:32,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:32,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:32,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash 573964458, now seen corresponding path program 1 times [2023-09-01 04:28:32,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:32,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78285755] [2023-09-01 04:28:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:32,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:32,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:32,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:32,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 04:28:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 04:28:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:32,795 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-09-01 04:28:32,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-09-01 04:28:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:32,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:32,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78285755] [2023-09-01 04:28:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78285755] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:32,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:32,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900182896] [2023-09-01 04:28:32,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:32,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:32,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:32,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 298 [2023-09-01 04:28:32,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:32,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:32,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 298 [2023-09-01 04:28:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:33,145 INFO L130 PetriNetUnfolder]: 568/967 cut-off events. [2023-09-01 04:28:33,145 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 04:28:33,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 967 events. 568/967 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4392 event pairs, 426 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1860. Up to 876 conditions per place. [2023-09-01 04:28:33,149 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 33 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-09-01 04:28:33,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 158 flow [2023-09-01 04:28:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-09-01 04:28:33,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966442953020134 [2023-09-01 04:28:33,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-09-01 04:28:33,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-09-01 04:28:33,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:33,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-09-01 04:28:33,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-09-01 04:28:33,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:33,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:33,156 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 90 flow. Second operand 3 states and 444 transitions. [2023-09-01 04:28:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 158 flow [2023-09-01 04:28:33,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:33,157 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 88 flow [2023-09-01 04:28:33,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-09-01 04:28:33,158 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-09-01 04:28:33,158 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 88 flow [2023-09-01 04:28:33,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:33,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:33,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:33,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:33,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:33,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 573950959, now seen corresponding path program 1 times [2023-09-01 04:28:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671828062] [2023-09-01 04:28:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:33,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:33,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:33,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:33,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 04:28:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 04:28:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:33,499 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-09-01 04:28:33,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2023-09-01 04:28:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:33,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:33,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671828062] [2023-09-01 04:28:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671828062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:33,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4613083] [2023-09-01 04:28:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:33,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:33,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 298 [2023-09-01 04:28:33,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:33,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:33,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 298 [2023-09-01 04:28:33,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:35,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 04:28:35,987 INFO L130 PetriNetUnfolder]: 489/834 cut-off events. [2023-09-01 04:28:35,987 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 04:28:35,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 834 events. 489/834 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3630 event pairs, 357 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 1599. Up to 749 conditions per place. [2023-09-01 04:28:35,990 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 31 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-09-01 04:28:35,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 150 flow [2023-09-01 04:28:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-09-01 04:28:35,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123042505592841 [2023-09-01 04:28:35,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-09-01 04:28:35,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-09-01 04:28:35,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:35,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-09-01 04:28:35,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:35,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:35,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:35,996 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 88 flow. Second operand 3 states and 458 transitions. [2023-09-01 04:28:35,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 150 flow [2023-09-01 04:28:35,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:35,998 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 84 flow [2023-09-01 04:28:35,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-09-01 04:28:35,999 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -11 predicate places. [2023-09-01 04:28:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 84 flow [2023-09-01 04:28:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:35,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:35,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 04:28:36,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:36,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:36,209 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:36,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 573950960, now seen corresponding path program 1 times [2023-09-01 04:28:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:36,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915951069] [2023-09-01 04:28:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:36,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:36,217 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:36,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 04:28:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:36,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 04:28:36,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 04:28:36,363 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-09-01 04:28:36,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 15 treesize of output 27 [2023-09-01 04:28:36,386 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-09-01 04:28:36,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2023-09-01 04:28:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:36,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:36,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915951069] [2023-09-01 04:28:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915951069] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:36,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:36,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:36,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461798535] [2023-09-01 04:28:36,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:36,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:36,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:36,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 298 [2023-09-01 04:28:36,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:36,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:36,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 298 [2023-09-01 04:28:36,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:37,039 INFO L130 PetriNetUnfolder]: 749/1262 cut-off events. [2023-09-01 04:28:37,040 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 04:28:37,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2441 conditions, 1262 events. 749/1262 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5387 event pairs, 249 based on Foata normal form. 0/933 useless extension candidates. Maximal degree in co-relation 2437. Up to 715 conditions per place. [2023-09-01 04:28:37,045 INFO L137 encePairwiseOnDemand]: 292/298 looper letters, 55 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-09-01 04:28:37,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 63 transitions, 255 flow [2023-09-01 04:28:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-09-01 04:28:37,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447427293064877 [2023-09-01 04:28:37,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-09-01 04:28:37,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-09-01 04:28:37,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:37,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-09-01 04:28:37,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,052 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 84 flow. Second operand 3 states and 487 transitions. [2023-09-01 04:28:37,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 63 transitions, 255 flow [2023-09-01 04:28:37,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 63 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:37,053 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 103 flow [2023-09-01 04:28:37,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-09-01 04:28:37,054 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -10 predicate places. [2023-09-01 04:28:37,054 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 103 flow [2023-09-01 04:28:37,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:37,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:37,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:37,265 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:37,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1811050866, now seen corresponding path program 1 times [2023-09-01 04:28:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:37,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793203293] [2023-09-01 04:28:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:37,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:37,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:37,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 04:28:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:28:37,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:37,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:37,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:37,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793203293] [2023-09-01 04:28:37,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793203293] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:37,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:37,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 04:28:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77552783] [2023-09-01 04:28:37,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:37,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:37,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-09-01 04:28:37,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:37,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-09-01 04:28:37,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:37,724 INFO L130 PetriNetUnfolder]: 665/1134 cut-off events. [2023-09-01 04:28:37,724 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-09-01 04:28:37,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2348 conditions, 1134 events. 665/1134 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4715 event pairs, 205 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 2343. Up to 697 conditions per place. [2023-09-01 04:28:37,729 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 53 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-09-01 04:28:37,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 253 flow [2023-09-01 04:28:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-09-01 04:28:37,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302013422818792 [2023-09-01 04:28:37,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-09-01 04:28:37,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-09-01 04:28:37,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:37,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-09-01 04:28:37,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,735 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 103 flow. Second operand 3 states and 474 transitions. [2023-09-01 04:28:37,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 253 flow [2023-09-01 04:28:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:37,742 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 104 flow [2023-09-01 04:28:37,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-09-01 04:28:37,745 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-09-01 04:28:37,745 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 104 flow [2023-09-01 04:28:37,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:37,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:37,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:37,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:37,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:37,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash 566760155, now seen corresponding path program 1 times [2023-09-01 04:28:37,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:37,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840861383] [2023-09-01 04:28:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:37,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:37,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:37,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-09-01 04:28:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:38,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:28:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:38,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:38,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840861383] [2023-09-01 04:28:38,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840861383] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:38,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:38,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:38,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017534457] [2023-09-01 04:28:38,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:38,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-09-01 04:28:38,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:38,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-09-01 04:28:38,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:38,332 INFO L130 PetriNetUnfolder]: 804/1355 cut-off events. [2023-09-01 04:28:38,333 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:28:38,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2921 conditions, 1355 events. 804/1355 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5834 event pairs, 343 based on Foata normal form. 0/1086 useless extension candidates. Maximal degree in co-relation 2915. Up to 734 conditions per place. [2023-09-01 04:28:38,338 INFO L137 encePairwiseOnDemand]: 293/298 looper letters, 57 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-09-01 04:28:38,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 287 flow [2023-09-01 04:28:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-09-01 04:28:38,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346756152125279 [2023-09-01 04:28:38,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-09-01 04:28:38,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-09-01 04:28:38,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:38,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-09-01 04:28:38,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,344 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 104 flow. Second operand 3 states and 478 transitions. [2023-09-01 04:28:38,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 287 flow [2023-09-01 04:28:38,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:38,346 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 126 flow [2023-09-01 04:28:38,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-09-01 04:28:38,346 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-09-01 04:28:38,347 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 126 flow [2023-09-01 04:28:38,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:38,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:38,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-09-01 04:28:38,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:38,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:38,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1091936800, now seen corresponding path program 1 times [2023-09-01 04:28:38,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:38,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126588929] [2023-09-01 04:28:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:38,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:38,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-09-01 04:28:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:28:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:38,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:38,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:38,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126588929] [2023-09-01 04:28:38,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126588929] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:38,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:38,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:38,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060674534] [2023-09-01 04:28:38,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:38,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:38,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:38,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 298 [2023-09-01 04:28:38,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:38,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 298 [2023-09-01 04:28:38,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:38,941 INFO L130 PetriNetUnfolder]: 866/1521 cut-off events. [2023-09-01 04:28:38,941 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-09-01 04:28:38,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3336 conditions, 1521 events. 866/1521 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7534 event pairs, 393 based on Foata normal form. 0/1275 useless extension candidates. Maximal degree in co-relation 3329. Up to 1187 conditions per place. [2023-09-01 04:28:38,948 INFO L137 encePairwiseOnDemand]: 295/298 looper letters, 53 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-09-01 04:28:38,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 292 flow [2023-09-01 04:28:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-09-01 04:28:38,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346756152125279 [2023-09-01 04:28:38,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-09-01 04:28:38,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-09-01 04:28:38,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:38,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-09-01 04:28:38,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,954 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 126 flow. Second operand 3 states and 478 transitions. [2023-09-01 04:28:38,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 292 flow [2023-09-01 04:28:38,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:38,959 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 130 flow [2023-09-01 04:28:38,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-09-01 04:28:38,960 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-09-01 04:28:38,960 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 130 flow [2023-09-01 04:28:38,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:38,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:38,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:38,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:39,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:39,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:39,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash 40912563, now seen corresponding path program 1 times [2023-09-01 04:28:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:39,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983082812] [2023-09-01 04:28:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:39,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:39,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-09-01 04:28:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:28:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:39,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:39,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983082812] [2023-09-01 04:28:39,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983082812] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:39,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:39,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:39,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552844561] [2023-09-01 04:28:39,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:39,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-09-01 04:28:39,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:39,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:39,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-09-01 04:28:39,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:39,546 INFO L130 PetriNetUnfolder]: 605/1120 cut-off events. [2023-09-01 04:28:39,546 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:28:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1120 events. 605/1120 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5194 event pairs, 239 based on Foata normal form. 60/1055 useless extension candidates. Maximal degree in co-relation 2485. Up to 636 conditions per place. [2023-09-01 04:28:39,551 INFO L137 encePairwiseOnDemand]: 291/298 looper letters, 48 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-09-01 04:28:39,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 272 flow [2023-09-01 04:28:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-09-01 04:28:39,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246085011185683 [2023-09-01 04:28:39,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-09-01 04:28:39,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-09-01 04:28:39,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:39,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-09-01 04:28:39,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:39,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:39,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:39,557 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 130 flow. Second operand 3 states and 469 transitions. [2023-09-01 04:28:39,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 272 flow [2023-09-01 04:28:39,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 265 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:39,559 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 146 flow [2023-09-01 04:28:39,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-09-01 04:28:39,560 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-09-01 04:28:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 146 flow [2023-09-01 04:28:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:39,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:39,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:39,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:39,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:39,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash 873333331, now seen corresponding path program 1 times [2023-09-01 04:28:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:39,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354479904] [2023-09-01 04:28:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:39,774 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:39,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-09-01 04:28:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 04:28:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:39,901 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 9 [2023-09-01 04:28:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:39,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:39,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:39,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354479904] [2023-09-01 04:28:39,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354479904] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:39,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:39,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791129662] [2023-09-01 04:28:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:39,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:39,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-09-01 04:28:39,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:39,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:39,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-09-01 04:28:39,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:40,160 INFO L130 PetriNetUnfolder]: 597/1090 cut-off events. [2023-09-01 04:28:40,160 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-09-01 04:28:40,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 1090 events. 597/1090 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4813 event pairs, 179 based on Foata normal form. 22/1042 useless extension candidates. Maximal degree in co-relation 2575. Up to 600 conditions per place. [2023-09-01 04:28:40,171 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 46 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-09-01 04:28:40,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 280 flow [2023-09-01 04:28:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-09-01 04:28:40,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201342281879194 [2023-09-01 04:28:40,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-09-01 04:28:40,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-09-01 04:28:40,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:40,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-09-01 04:28:40,179 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) [2023-09-01 04:28:40,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:40,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:40,181 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 146 flow. Second operand 3 states and 465 transitions. [2023-09-01 04:28:40,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 280 flow [2023-09-01 04:28:40,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:40,183 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 146 flow [2023-09-01 04:28:40,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-09-01 04:28:40,184 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-09-01 04:28:40,184 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 146 flow [2023-09-01 04:28:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:40,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:40,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:40,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-09-01 04:28:40,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:40,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:40,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash -497446094, now seen corresponding path program 1 times [2023-09-01 04:28:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901930855] [2023-09-01 04:28:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:40,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:40,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-09-01 04:28:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 04:28:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:40,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:40,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:40,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901930855] [2023-09-01 04:28:40,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901930855] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:40,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:40,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112753425] [2023-09-01 04:28:40,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:40,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:28:40,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:28:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:28:40,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 298 [2023-09-01 04:28:40,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:40,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:40,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 298 [2023-09-01 04:28:40,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:41,127 INFO L130 PetriNetUnfolder]: 784/1507 cut-off events. [2023-09-01 04:28:41,127 INFO L131 PetriNetUnfolder]: For 356/360 co-relation queries the response was YES. [2023-09-01 04:28:41,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3646 conditions, 1507 events. 784/1507 cut-off events. For 356/360 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 7110 event pairs, 325 based on Foata normal form. 0/1441 useless extension candidates. Maximal degree in co-relation 3637. Up to 568 conditions per place. [2023-09-01 04:28:41,132 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 80 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-09-01 04:28:41,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 89 transitions, 463 flow [2023-09-01 04:28:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:28:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:28:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-09-01 04:28:41,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218120805369127 [2023-09-01 04:28:41,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-09-01 04:28:41,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-09-01 04:28:41,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:41,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-09-01 04:28:41,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,139 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,139 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 146 flow. Second operand 4 states and 622 transitions. [2023-09-01 04:28:41,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 89 transitions, 463 flow [2023-09-01 04:28:41,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:41,142 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 156 flow [2023-09-01 04:28:41,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-09-01 04:28:41,143 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-09-01 04:28:41,143 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 156 flow [2023-09-01 04:28:41,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:41,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:41,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:41,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:41,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:41,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash 136273049, now seen corresponding path program 1 times [2023-09-01 04:28:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535232449] [2023-09-01 04:28:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:41,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:41,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:41,363 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:41,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-09-01 04:28:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 04:28:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:41,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:41,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:41,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535232449] [2023-09-01 04:28:41,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535232449] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:41,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:41,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 04:28:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84202307] [2023-09-01 04:28:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:41,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 04:28:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 04:28:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 04:28:41,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 298 [2023-09-01 04:28:41,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:41,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 298 [2023-09-01 04:28:41,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:41,696 INFO L130 PetriNetUnfolder]: 689/1310 cut-off events. [2023-09-01 04:28:41,696 INFO L131 PetriNetUnfolder]: For 385/387 co-relation queries the response was YES. [2023-09-01 04:28:41,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1310 events. 689/1310 cut-off events. For 385/387 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5924 event pairs, 317 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 3115. Up to 687 conditions per place. [2023-09-01 04:28:41,700 INFO L137 encePairwiseOnDemand]: 293/298 looper letters, 48 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-09-01 04:28:41,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 297 flow [2023-09-01 04:28:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 04:28:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 04:28:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-09-01 04:28:41,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246085011185683 [2023-09-01 04:28:41,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-09-01 04:28:41,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-09-01 04:28:41,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:41,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-09-01 04:28:41,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,707 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 156 flow. Second operand 3 states and 469 transitions. [2023-09-01 04:28:41,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 297 flow [2023-09-01 04:28:41,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:41,709 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2023-09-01 04:28:41,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-09-01 04:28:41,710 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-09-01 04:28:41,710 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2023-09-01 04:28:41,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:41,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:41,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:41,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:41,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:41,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:41,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash 332254700, now seen corresponding path program 1 times [2023-09-01 04:28:41,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:41,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296624970] [2023-09-01 04:28:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:41,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:41,922 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:41,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-09-01 04:28:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 04:28:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:42,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:42,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:42,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296624970] [2023-09-01 04:28:42,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296624970] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:42,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:42,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 04:28:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831158219] [2023-09-01 04:28:42,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 04:28:42,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 04:28:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 04:28:42,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 298 [2023-09-01 04:28:42,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:42,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:42,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 298 [2023-09-01 04:28:42,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:42,500 INFO L130 PetriNetUnfolder]: 515/1006 cut-off events. [2023-09-01 04:28:42,501 INFO L131 PetriNetUnfolder]: For 269/271 co-relation queries the response was YES. [2023-09-01 04:28:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1006 events. 515/1006 cut-off events. For 269/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4158 event pairs, 189 based on Foata normal form. 0/989 useless extension candidates. Maximal degree in co-relation 2397. Up to 465 conditions per place. [2023-09-01 04:28:42,505 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 59 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-09-01 04:28:42,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 355 flow [2023-09-01 04:28:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 04:28:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 04:28:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 597 transitions. [2023-09-01 04:28:42,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008389261744967 [2023-09-01 04:28:42,507 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 597 transitions. [2023-09-01 04:28:42,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 597 transitions. [2023-09-01 04:28:42,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:42,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 597 transitions. [2023-09-01 04:28:42,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:42,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:42,512 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 298.0) internal successors, (1490), 5 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:42,512 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 4 states and 597 transitions. [2023-09-01 04:28:42,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 355 flow [2023-09-01 04:28:42,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:42,514 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 158 flow [2023-09-01 04:28:42,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-09-01 04:28:42,515 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-09-01 04:28:42,515 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 158 flow [2023-09-01 04:28:42,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:42,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:42,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:42,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:42,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:42,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:42,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1709894250, now seen corresponding path program 1 times [2023-09-01 04:28:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927793219] [2023-09-01 04:28:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:28:42,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:42,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:42,728 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:42,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-09-01 04:28:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 04:28:42,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:28:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:42,977 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 12 treesize of output 8 [2023-09-01 04:28:43,091 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 18 treesize of output 10 [2023-09-01 04:28:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:43,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:43,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927793219] [2023-09-01 04:28:43,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927793219] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:43,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:43,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:28:43,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040471107] [2023-09-01 04:28:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:43,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:28:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:28:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:28:43,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 298 [2023-09-01 04:28:43,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 158 flow. Second operand has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:43,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:43,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 298 [2023-09-01 04:28:43,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:44,506 INFO L130 PetriNetUnfolder]: 645/1254 cut-off events. [2023-09-01 04:28:44,506 INFO L131 PetriNetUnfolder]: For 429/435 co-relation queries the response was YES. [2023-09-01 04:28:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 1254 events. 645/1254 cut-off events. For 429/435 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5658 event pairs, 197 based on Foata normal form. 38/1281 useless extension candidates. Maximal degree in co-relation 3027. Up to 827 conditions per place. [2023-09-01 04:28:44,509 INFO L137 encePairwiseOnDemand]: 286/298 looper letters, 78 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2023-09-01 04:28:44,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 521 flow [2023-09-01 04:28:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:28:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:28:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1243 transitions. [2023-09-01 04:28:44,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711409395973154 [2023-09-01 04:28:44,513 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1243 transitions. [2023-09-01 04:28:44,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1243 transitions. [2023-09-01 04:28:44,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:44,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1243 transitions. [2023-09-01 04:28:44,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 124.3) internal successors, (1243), 10 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:44,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 298.0) internal successors, (3278), 11 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:44,521 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 298.0) internal successors, (3278), 11 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:44,521 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 158 flow. Second operand 10 states and 1243 transitions. [2023-09-01 04:28:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 521 flow [2023-09-01 04:28:44,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 509 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 04:28:44,524 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 280 flow [2023-09-01 04:28:44,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-09-01 04:28:44,524 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-09-01 04:28:44,524 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 280 flow [2023-09-01 04:28:44,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:44,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:44,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:44,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:44,737 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:44,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -544309646, now seen corresponding path program 2 times [2023-09-01 04:28:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:44,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046017843] [2023-09-01 04:28:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 04:28:44,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:44,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:44,738 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:44,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-09-01 04:28:44,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:28:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:28:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:28:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:44,992 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 12 treesize of output 8 [2023-09-01 04:28:45,097 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 18 treesize of output 10 [2023-09-01 04:28:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:45,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:45,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046017843] [2023-09-01 04:28:45,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046017843] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:45,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:45,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:28:45,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892038127] [2023-09-01 04:28:45,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:45,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:28:45,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:28:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:28:45,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 298 [2023-09-01 04:28:45,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 280 flow. Second operand has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:45,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:45,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 298 [2023-09-01 04:28:45,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:48,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:28:50,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:28:52,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:28:53,343 INFO L130 PetriNetUnfolder]: 771/1504 cut-off events. [2023-09-01 04:28:53,343 INFO L131 PetriNetUnfolder]: For 1777/1789 co-relation queries the response was YES. [2023-09-01 04:28:53,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4432 conditions, 1504 events. 771/1504 cut-off events. For 1777/1789 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7278 event pairs, 269 based on Foata normal form. 40/1530 useless extension candidates. Maximal degree in co-relation 4413. Up to 1003 conditions per place. [2023-09-01 04:28:53,349 INFO L137 encePairwiseOnDemand]: 286/298 looper letters, 82 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2023-09-01 04:28:53,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 687 flow [2023-09-01 04:28:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:28:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:28:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1243 transitions. [2023-09-01 04:28:53,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711409395973154 [2023-09-01 04:28:53,354 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1243 transitions. [2023-09-01 04:28:53,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1243 transitions. [2023-09-01 04:28:53,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:53,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1243 transitions. [2023-09-01 04:28:53,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 124.3) internal successors, (1243), 10 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:53,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 298.0) internal successors, (3278), 11 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:53,361 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 298.0) internal successors, (3278), 11 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:53,362 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 280 flow. Second operand 10 states and 1243 transitions. [2023-09-01 04:28:53,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 687 flow [2023-09-01 04:28:53,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 680 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 04:28:53,367 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 452 flow [2023-09-01 04:28:53,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=452, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-09-01 04:28:53,368 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-09-01 04:28:53,368 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 452 flow [2023-09-01 04:28:53,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:53,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:53,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:53,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:53,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:53,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash 74783278, now seen corresponding path program 3 times [2023-09-01 04:28:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829242026] [2023-09-01 04:28:53,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 04:28:53,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:53,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:53,582 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:53,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-09-01 04:28:53,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 04:28:53,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:28:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:28:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:53,799 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 12 treesize of output 8 [2023-09-01 04:28:53,906 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 18 treesize of output 10 [2023-09-01 04:28:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:53,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:53,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:53,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829242026] [2023-09-01 04:28:53,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829242026] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:53,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:53,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:28:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363426212] [2023-09-01 04:28:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:28:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:28:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:28:54,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 298 [2023-09-01 04:28:54,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 452 flow. Second operand has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:54,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:54,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 298 [2023-09-01 04:28:54,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:55,331 INFO L130 PetriNetUnfolder]: 1009/1982 cut-off events. [2023-09-01 04:28:55,331 INFO L131 PetriNetUnfolder]: For 6575/6603 co-relation queries the response was YES. [2023-09-01 04:28:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1982 events. 1009/1982 cut-off events. For 6575/6603 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10760 event pairs, 262 based on Foata normal form. 44/2010 useless extension candidates. Maximal degree in co-relation 6886. Up to 822 conditions per place. [2023-09-01 04:28:55,341 INFO L137 encePairwiseOnDemand]: 285/298 looper letters, 110 selfloop transitions, 31 changer transitions 0/147 dead transitions. [2023-09-01 04:28:55,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 147 transitions, 1158 flow [2023-09-01 04:28:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 04:28:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 04:28:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1608 transitions. [2023-09-01 04:28:55,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41507485802787814 [2023-09-01 04:28:55,346 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1608 transitions. [2023-09-01 04:28:55,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1608 transitions. [2023-09-01 04:28:55,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:55,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1608 transitions. [2023-09-01 04:28:55,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 123.6923076923077) internal successors, (1608), 13 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:55,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:55,356 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:55,356 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 452 flow. Second operand 13 states and 1608 transitions. [2023-09-01 04:28:55,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 147 transitions, 1158 flow [2023-09-01 04:28:55,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 147 transitions, 1114 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-09-01 04:28:55,367 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 665 flow [2023-09-01 04:28:55,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=665, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-09-01 04:28:55,368 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2023-09-01 04:28:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 665 flow [2023-09-01 04:28:55,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:55,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:55,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:55,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-09-01 04:28:55,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:55,581 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:55,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:55,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1364317648, now seen corresponding path program 4 times [2023-09-01 04:28:55,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:55,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348205051] [2023-09-01 04:28:55,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 04:28:55,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:55,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:55,583 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:55,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-09-01 04:28:55,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 04:28:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:28:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 04:28:55,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:55,863 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 12 treesize of output 8 [2023-09-01 04:28:55,955 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 18 treesize of output 10 [2023-09-01 04:28:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:55,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:55,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348205051] [2023-09-01 04:28:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348205051] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:55,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 04:28:55,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265531607] [2023-09-01 04:28:55,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 04:28:55,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:55,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 04:28:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 04:28:56,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 298 [2023-09-01 04:28:56,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:56,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:56,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 298 [2023-09-01 04:28:56,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:28:57,404 INFO L130 PetriNetUnfolder]: 1099/2152 cut-off events. [2023-09-01 04:28:57,404 INFO L131 PetriNetUnfolder]: For 7698/7718 co-relation queries the response was YES. [2023-09-01 04:28:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7840 conditions, 2152 events. 1099/2152 cut-off events. For 7698/7718 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11939 event pairs, 378 based on Foata normal form. 34/2165 useless extension candidates. Maximal degree in co-relation 7808. Up to 1580 conditions per place. [2023-09-01 04:28:57,414 INFO L137 encePairwiseOnDemand]: 286/298 looper letters, 103 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2023-09-01 04:28:57,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 131 transitions, 1152 flow [2023-09-01 04:28:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 04:28:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 04:28:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1238 transitions. [2023-09-01 04:28:57,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154362416107383 [2023-09-01 04:28:57,420 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1238 transitions. [2023-09-01 04:28:57,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1238 transitions. [2023-09-01 04:28:57,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:28:57,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1238 transitions. [2023-09-01 04:28:57,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.8) internal successors, (1238), 10 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:57,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 298.0) internal successors, (3278), 11 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:57,427 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 298.0) internal successors, (3278), 11 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:57,427 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 665 flow. Second operand 10 states and 1238 transitions. [2023-09-01 04:28:57,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 131 transitions, 1152 flow [2023-09-01 04:28:57,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 131 transitions, 1118 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-09-01 04:28:57,440 INFO L231 Difference]: Finished difference. Result has 110 places, 92 transitions, 773 flow [2023-09-01 04:28:57,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=773, PETRI_PLACES=110, PETRI_TRANSITIONS=92} [2023-09-01 04:28:57,441 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 61 predicate places. [2023-09-01 04:28:57,441 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 92 transitions, 773 flow [2023-09-01 04:28:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:57,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:28:57,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:28:57,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-09-01 04:28:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:57,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:28:57,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:28:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash -59776840, now seen corresponding path program 5 times [2023-09-01 04:28:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:28:57,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137362359] [2023-09-01 04:28:57,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 04:28:57,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:28:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:28:57,645 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:28:57,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-09-01 04:28:57,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 04:28:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 04:28:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 04:28:57,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 04:28:57,859 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-09-01 04:28:57,860 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 31 treesize of output 38 [2023-09-01 04:28:58,050 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 12 treesize of output 8 [2023-09-01 04:28:58,106 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 15 treesize of output 17 [2023-09-01 04:28:58,254 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 18 treesize of output 10 [2023-09-01 04:28:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 04:28:58,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 04:28:58,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 04:28:58,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137362359] [2023-09-01 04:28:58,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137362359] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 04:28:58,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 04:28:58,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 04:28:58,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826100458] [2023-09-01 04:28:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 04:28:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 04:28:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 04:28:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 04:28:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-09-01 04:28:58,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 298 [2023-09-01 04:28:58,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 92 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 114.6) internal successors, (1146), 10 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:28:58,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 04:28:58,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 298 [2023-09-01 04:28:58,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 04:29:01,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 04:29:03,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 04:29:03,548 INFO L130 PetriNetUnfolder]: 1127/2196 cut-off events. [2023-09-01 04:29:03,548 INFO L131 PetriNetUnfolder]: For 9431/9455 co-relation queries the response was YES. [2023-09-01 04:29:03,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8217 conditions, 2196 events. 1127/2196 cut-off events. For 9431/9455 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12132 event pairs, 230 based on Foata normal form. 38/2218 useless extension candidates. Maximal degree in co-relation 8179. Up to 536 conditions per place. [2023-09-01 04:29:03,560 INFO L137 encePairwiseOnDemand]: 286/298 looper letters, 98 selfloop transitions, 50 changer transitions 0/154 dead transitions. [2023-09-01 04:29:03,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1379 flow [2023-09-01 04:29:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 04:29:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 04:29:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1581 transitions. [2023-09-01 04:29:03,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40810531750129064 [2023-09-01 04:29:03,565 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1581 transitions. [2023-09-01 04:29:03,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1581 transitions. [2023-09-01 04:29:03,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 04:29:03,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1581 transitions. [2023-09-01 04:29:03,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 121.61538461538461) internal successors, (1581), 13 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:29:03,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:29:03,574 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 298.0) internal successors, (4172), 14 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:29:03,574 INFO L175 Difference]: Start difference. First operand has 110 places, 92 transitions, 773 flow. Second operand 13 states and 1581 transitions. [2023-09-01 04:29:03,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1379 flow [2023-09-01 04:29:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 154 transitions, 1333 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-09-01 04:29:03,591 INFO L231 Difference]: Finished difference. Result has 122 places, 96 transitions, 911 flow [2023-09-01 04:29:03,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=911, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2023-09-01 04:29:03,592 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-09-01 04:29:03,592 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 911 flow [2023-09-01 04:29:03,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.6) internal successors, (1146), 10 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 04:29:03,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:29:03,593 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] [2023-09-01 04:29:03,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-09-01 04:29:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:29:03,804 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-09-01 04:29:03,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:29:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1625294779, now seen corresponding path program 1 times [2023-09-01 04:29:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 04:29:03,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404995792] [2023-09-01 04:29:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:29:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:29:03,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 04:29:03,806 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 04:29:03,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-09-01 04:29:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:29:03,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:29:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:29:04,118 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-09-01 04:29:04,118 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:29:04,119 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-09-01 04:29:04,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-09-01 04:29:04,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-09-01 04:29:04,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-09-01 04:29:04,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-09-01 04:29:04,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (5 of 23 remaining) [2023-09-01 04:29:04,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-09-01 04:29:04,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-09-01 04:29:04,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-09-01 04:29:04,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-09-01 04:29:04,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-09-01 04:29:04,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-09-01 04:29:04,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 04:29:04,331 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:29:04,336 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 04:29:04,336 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 04:29:04,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 04:29:04 BasicIcfg [2023-09-01 04:29:04,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 04:29:04,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 04:29:04,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 04:29:04,390 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 04:29:04,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:27:35" (3/4) ... [2023-09-01 04:29:04,392 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-09-01 04:29:04,392 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 04:29:04,392 INFO L158 Benchmark]: Toolchain (without parser) took 90639.64ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 63.7MB in the beginning and 45.8MB in the end (delta: 17.9MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. [2023-09-01 04:29:04,393 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:29:04,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 525.28ms. Allocated memory is still 83.9MB. Free memory was 63.3MB in the beginning and 62.0MB in the end (delta: 1.3MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2023-09-01 04:29:04,393 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.00ms. Allocated memory is still 83.9MB. Free memory was 62.0MB in the beginning and 59.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:29:04,393 INFO L158 Benchmark]: Boogie Preprocessor took 55.83ms. Allocated memory is still 83.9MB. Free memory was 59.5MB in the beginning and 57.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 04:29:04,393 INFO L158 Benchmark]: RCFGBuilder took 666.67ms. Allocated memory is still 83.9MB. Free memory was 57.4MB in the beginning and 36.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-09-01 04:29:04,394 INFO L158 Benchmark]: TraceAbstraction took 89303.93ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 35.7MB in the beginning and 46.8MB in the end (delta: -11.1MB). Peak memory consumption was 82.0MB. Max. memory is 16.1GB. [2023-09-01 04:29:04,394 INFO L158 Benchmark]: Witness Printer took 2.47ms. Allocated memory is still 176.2MB. Free memory was 46.8MB in the beginning and 45.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 04:29:04,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 65.0MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 525.28ms. Allocated memory is still 83.9MB. Free memory was 63.3MB in the beginning and 62.0MB in the end (delta: 1.3MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.00ms. Allocated memory is still 83.9MB. Free memory was 62.0MB in the beginning and 59.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.83ms. Allocated memory is still 83.9MB. Free memory was 59.5MB in the beginning and 57.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 666.67ms. Allocated memory is still 83.9MB. Free memory was 57.4MB in the beginning and 36.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 89303.93ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 35.7MB in the beginning and 46.8MB in the end (delta: -11.1MB). Peak memory consumption was 82.0MB. Max. memory is 16.1GB. * Witness Printer took 2.47ms. Allocated memory is still 176.2MB. Free memory was 46.8MB in the beginning and 45.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 52.1s, 146 PlacesBefore, 49 PlacesAfterwards, 149 TransitionsBefore, 48 TransitionsAfterwards, 4628 CoEnabledTransitionPairs, 7 FixpointIterations, 57 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 4 ChoiceCompositions, 143 TotalNumberOfCompositions, 12357 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7269, independent: 6941, independent conditional: 0, independent unconditional: 6941, dependent: 328, dependent conditional: 0, dependent unconditional: 328, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2620, independent: 2580, independent conditional: 0, independent unconditional: 2580, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7269, independent: 4361, independent conditional: 0, independent unconditional: 4361, dependent: 288, dependent conditional: 0, dependent unconditional: 288, unknown: 2620, unknown conditional: 0, unknown unconditional: 2620] , Statistics on independence cache: Total cache size (in pairs): 314, Positive cache size: 293, Positive conditional cache size: 0, Positive unconditional cache size: 293, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 746]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 746. Possible FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={15:0}, id2={7:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={15:0}, id2={7:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 216 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 89.1s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 52.3s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 2931 SdHoareTripleChecker+Valid, 24.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2118 mSDsluCounter, 2142 SdHoareTripleChecker+Invalid, 23.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2021 mSDsCounter, 230 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7276 IncrementalHoareTripleChecker+Invalid, 7512 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 230 mSolverCounterUnsat, 121 mSDtfsCounter, 7276 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=911occurred in iteration=20, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 246 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 204 ConstructedInterpolants, 8 QuantifiedInterpolants, 2147 SizeOfPredicates, 64 NumberOfNonLiveVariables, 2256 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 3/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-09-01 04:29:04,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample