./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:41:06,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:41:06,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:41:07,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:41:07,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:41:07,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:41:07,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:41:07,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:41:07,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:41:07,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:41:07,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:41:07,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:41:07,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:41:07,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:41:07,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:41:07,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:41:07,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:41:07,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:41:07,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:41:07,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:41:07,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:41:07,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:41:07,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:41:07,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:41:07,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:41:07,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:41:07,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:41:07,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:41:07,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:41:07,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:41:07,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:41:07,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:41:07,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:41:07,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:41:07,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:41:07,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:41:07,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:41:07,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:41:07,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:41:07,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:41:07,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:41:07,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:41:07,155 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:41:07,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:41:07,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:41:07,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:41:07,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:41:07,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:41:07,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:41:07,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:41:07,158 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:41:07,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:41:07,159 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:41:07,159 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:41:07,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:41:07,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:41:07,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:41:07,160 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:41:07,160 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:41:07,160 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:41:07,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:41:07,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:41:07,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:41:07,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:41:07,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:41:07,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:41:07,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:41:07,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:07,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:41:07,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:41:07,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:41:07,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:41:07,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:41:07,163 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:41:07,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:41:07,163 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:41:07,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:41:07,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:41:07,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:41:07,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:41:07,590 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:41:07,590 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:41:07,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-29 21:41:08,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:41:08,874 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:41:08,874 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-29 21:41:08,915 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd034c428/56fd2223ddd54cafb380d82b484c446d/FLAGc4f31b11c [2023-08-29 21:41:08,932 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd034c428/56fd2223ddd54cafb380d82b484c446d [2023-08-29 21:41:08,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:41:08,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:41:08,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:08,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:41:08,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:41:08,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:08" (1/1) ... [2023-08-29 21:41:08,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6d00d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:08, skipping insertion in model container [2023-08-29 21:41:08,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:08" (1/1) ... [2023-08-29 21:41:08,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:41:08,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:41:09,248 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2023-08-29 21:41:09,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:09,281 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:41:09,299 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2023-08-29 21:41:09,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:09,331 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:41:09,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09 WrapperNode [2023-08-29 21:41:09,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:09,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:09,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:41:09,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:41:09,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,364 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-08-29 21:41:09,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:09,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:41:09,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:41:09,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:41:09,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,385 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:41:09,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:41:09,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:41:09,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:41:09,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (1/1) ... [2023-08-29 21:41:09,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:09,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:41:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:41:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:41:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:41:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:41:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:41:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:41:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:41:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:41:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:41:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:41:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:41:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:41:09,457 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:41:09,560 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:41:09,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:41:09,742 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:41:09,757 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:41:09,757 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:41:09,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:09 BoogieIcfgContainer [2023-08-29 21:41:09,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:41:09,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:41:09,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:41:09,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:41:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:41:08" (1/3) ... [2023-08-29 21:41:09,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d613713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:09, skipping insertion in model container [2023-08-29 21:41:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:09" (2/3) ... [2023-08-29 21:41:09,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d613713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:09, skipping insertion in model container [2023-08-29 21:41:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:09" (3/3) ... [2023-08-29 21:41:09,767 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-08-29 21:41:09,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:41:09,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-29 21:41:09,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:41:09,869 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:41:09,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:09,987 INFO L130 PetriNetUnfolder]: 17/179 cut-off events. [2023-08-29 21:41:09,989 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:09,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 17/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 523 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:09,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:10,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:10,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:10,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:10,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:10,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:10,073 INFO L130 PetriNetUnfolder]: 17/179 cut-off events. [2023-08-29 21:41:10,074 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:10,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 17/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 523 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:10,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 4100 [2023-08-29 21:41:13,054 INFO L134 LiptonReduction]: Checked pairs total: 8553 [2023-08-29 21:41:13,054 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-29 21:41:13,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:13,067 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:13,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-29 21:41:13,069 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:41:13,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:13,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:13,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:13,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:13,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 16423, now seen corresponding path program 1 times [2023-08-29 21:41:13,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:13,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454530519] [2023-08-29 21:41:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:13,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:13,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454530519] [2023-08-29 21:41:13,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454530519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:13,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:13,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163465710] [2023-08-29 21:41:13,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:13,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:13,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:13,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:13,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 254 [2023-08-29 21:41:13,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:13,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 254 [2023-08-29 21:41:13,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:13,395 INFO L130 PetriNetUnfolder]: 181/441 cut-off events. [2023-08-29 21:41:13,396 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:13,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 441 events. 181/441 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2320 event pairs, 156 based on Foata normal form. 16/308 useless extension candidates. Maximal degree in co-relation 805. Up to 353 conditions per place. [2023-08-29 21:41:13,399 INFO L137 encePairwiseOnDemand]: 239/254 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-08-29 21:41:13,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 192 flow [2023-08-29 21:41:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-29 21:41:13,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275590551181102 [2023-08-29 21:41:13,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-29 21:41:13,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-29 21:41:13,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:13,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-29 21:41:13,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,423 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 106 flow. Second operand 3 states and 402 transitions. [2023-08-29 21:41:13,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 192 flow [2023-08-29 21:41:13,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:13,427 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 88 flow [2023-08-29 21:41:13,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-29 21:41:13,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-29 21:41:13,431 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 88 flow [2023-08-29 21:41:13,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:13,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:13,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:41:13,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:13,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 16422, now seen corresponding path program 1 times [2023-08-29 21:41:13,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:13,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327206327] [2023-08-29 21:41:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:13,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327206327] [2023-08-29 21:41:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327206327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:13,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:13,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644283187] [2023-08-29 21:41:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:13,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:13,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:13,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 254 [2023-08-29 21:41:13,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:13,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 254 [2023-08-29 21:41:13,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:13,655 INFO L130 PetriNetUnfolder]: 180/414 cut-off events. [2023-08-29 21:41:13,656 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 414 events. 180/414 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2226 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 805. Up to 382 conditions per place. [2023-08-29 21:41:13,660 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 42 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-29 21:41:13,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 202 flow [2023-08-29 21:41:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-08-29 21:41:13,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170603674540682 [2023-08-29 21:41:13,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-08-29 21:41:13,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-08-29 21:41:13,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:13,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-08-29 21:41:13,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,672 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 88 flow. Second operand 3 states and 394 transitions. [2023-08-29 21:41:13,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 202 flow [2023-08-29 21:41:13,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:13,676 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2023-08-29 21:41:13,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-29 21:41:13,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-29 21:41:13,677 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2023-08-29 21:41:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:13,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:41:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:41:13,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:13,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 489652153, now seen corresponding path program 1 times [2023-08-29 21:41:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:13,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891568957] [2023-08-29 21:41:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:13,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891568957] [2023-08-29 21:41:13,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891568957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:13,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216864539] [2023-08-29 21:41:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:13,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:13,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:13,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:41:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:14,074 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:41:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:14,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:14,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216864539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:14,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:14,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:14,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620803732] [2023-08-29 21:41:14,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:14,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:14,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 254 [2023-08-29 21:41:14,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:14,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 254 [2023-08-29 21:41:14,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:14,391 INFO L130 PetriNetUnfolder]: 24/79 cut-off events. [2023-08-29 21:41:14,391 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:41:14,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 79 events. 24/79 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 212 event pairs, 11 based on Foata normal form. 13/85 useless extension candidates. Maximal degree in co-relation 160. Up to 50 conditions per place. [2023-08-29 21:41:14,392 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-29 21:41:14,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-29 21:41:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-29 21:41:14,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714566929133858 [2023-08-29 21:41:14,393 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-29 21:41:14,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-29 21:41:14,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:14,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-29 21:41:14,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,397 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 479 transitions. [2023-08-29 21:41:14,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-29 21:41:14,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:14,398 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 47 flow [2023-08-29 21:41:14,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-29 21:41:14,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2023-08-29 21:41:14,399 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 47 flow [2023-08-29 21:41:14,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:14,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:14,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:41:14,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:14,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:14,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2000672370, now seen corresponding path program 1 times [2023-08-29 21:41:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:14,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526586862] [2023-08-29 21:41:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:14,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:14,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526586862] [2023-08-29 21:41:14,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526586862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:14,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:14,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:14,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877402127] [2023-08-29 21:41:14,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:14,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:14,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:14,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:14,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 254 [2023-08-29 21:41:14,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:14,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 254 [2023-08-29 21:41:14,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:14,863 INFO L130 PetriNetUnfolder]: 14/56 cut-off events. [2023-08-29 21:41:14,866 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:41:14,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 56 events. 14/56 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 123 event pairs, 0 based on Foata normal form. 3/56 useless extension candidates. Maximal degree in co-relation 97. Up to 35 conditions per place. [2023-08-29 21:41:14,867 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 11 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-29 21:41:14,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 75 flow [2023-08-29 21:41:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-29 21:41:14,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45570866141732286 [2023-08-29 21:41:14,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-29 21:41:14,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-29 21:41:14,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:14,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-29 21:41:14,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,872 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 47 flow. Second operand 4 states and 463 transitions. [2023-08-29 21:41:14,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 75 flow [2023-08-29 21:41:14,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:14,872 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 44 flow [2023-08-29 21:41:14,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-29 21:41:14,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -19 predicate places. [2023-08-29 21:41:14,874 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 44 flow [2023-08-29 21:41:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:14,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:14,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:41:14,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:14,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1891304268, now seen corresponding path program 1 times [2023-08-29 21:41:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:14,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225921313] [2023-08-29 21:41:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:14,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:14,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:14,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225921313] [2023-08-29 21:41:14,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225921313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:14,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:14,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:14,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944287111] [2023-08-29 21:41:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:14,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:14,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:15,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 254 [2023-08-29 21:41:15,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:15,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 254 [2023-08-29 21:41:15,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:15,057 INFO L130 PetriNetUnfolder]: 12/42 cut-off events. [2023-08-29 21:41:15,058 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:41:15,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 42 events. 12/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 3/45 useless extension candidates. Maximal degree in co-relation 80. Up to 30 conditions per place. [2023-08-29 21:41:15,058 INFO L137 encePairwiseOnDemand]: 248/254 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-29 21:41:15,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 65 flow [2023-08-29 21:41:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 424 transitions. [2023-08-29 21:41:15,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41732283464566927 [2023-08-29 21:41:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 424 transitions. [2023-08-29 21:41:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 424 transitions. [2023-08-29 21:41:15,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:15,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 424 transitions. [2023-08-29 21:41:15,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.0) internal successors, (424), 4 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) [2023-08-29 21:41:15,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,065 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 44 flow. Second operand 4 states and 424 transitions. [2023-08-29 21:41:15,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 65 flow [2023-08-29 21:41:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:15,066 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-29 21:41:15,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-29 21:41:15,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -22 predicate places. [2023-08-29 21:41:15,067 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-29 21:41:15,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,071 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 24 remaining) [2023-08-29 21:41:15,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2023-08-29 21:41:15,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-08-29 21:41:15,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-08-29 21:41:15,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-08-29 21:41:15,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-08-29 21:41:15,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-08-29 21:41:15,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (12 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-08-29 21:41:15,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (6 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2023-08-29 21:41:15,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2023-08-29 21:41:15,077 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2023-08-29 21:41:15,077 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 24 remaining) [2023-08-29 21:41:15,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:41:15,077 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:41:15,078 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:15,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:15,099 INFO L130 PetriNetUnfolder]: 17/179 cut-off events. [2023-08-29 21:41:15,099 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:15,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 17/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 523 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:15,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 135 transitions, 278 flow [2023-08-29 21:41:15,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 130 transitions, 265 flow [2023-08-29 21:41:15,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:15,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 130 transitions, 265 flow [2023-08-29 21:41:15,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 130 transitions, 265 flow [2023-08-29 21:41:15,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 130 transitions, 265 flow [2023-08-29 21:41:15,109 INFO L130 PetriNetUnfolder]: 16/174 cut-off events. [2023-08-29 21:41:15,109 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:15,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 16/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 498 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:15,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 4100 [2023-08-29 21:41:17,085 INFO L134 LiptonReduction]: Checked pairs total: 9239 [2023-08-29 21:41:17,086 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-29 21:41:17,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:17,101 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;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:17,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:17,106 INFO L130 PetriNetUnfolder]: 2/36 cut-off events. [2023-08-29 21:41:17,108 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:17,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:17,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:41:17,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:17,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1393403506, now seen corresponding path program 1 times [2023-08-29 21:41:17,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:17,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045464942] [2023-08-29 21:41:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:17,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:17,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:17,174 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:17,174 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:17,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:41:17,174 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:17,175 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:17,175 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:17,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:41:17,211 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:41:17,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:17,245 INFO L130 PetriNetUnfolder]: 31/295 cut-off events. [2023-08-29 21:41:17,245 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:17,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 295 events. 31/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-08-29 21:41:17,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:17,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:17,249 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:17,249 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:17,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:17,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:17,270 INFO L130 PetriNetUnfolder]: 31/295 cut-off events. [2023-08-29 21:41:17,270 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:17,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 295 events. 31/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-08-29 21:41:17,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 12464 [2023-08-29 21:41:19,764 INFO L134 LiptonReduction]: Checked pairs total: 31137 [2023-08-29 21:41:19,764 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-29 21:41:19,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:19,765 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;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:19,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-29 21:41:19,766 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:41:19,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:19,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:19,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:19,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash 32091, now seen corresponding path program 1 times [2023-08-29 21:41:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865423379] [2023-08-29 21:41:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:19,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865423379] [2023-08-29 21:41:19,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865423379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:19,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:19,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383659518] [2023-08-29 21:41:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:19,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:19,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 332 [2023-08-29 21:41:19,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:19,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:19,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 332 [2023-08-29 21:41:19,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:20,638 INFO L130 PetriNetUnfolder]: 5944/10002 cut-off events. [2023-08-29 21:41:20,639 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-08-29 21:41:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19510 conditions, 10002 events. 5944/10002 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 72201 event pairs, 5148 based on Foata normal form. 471/6702 useless extension candidates. Maximal degree in co-relation 11685. Up to 8188 conditions per place. [2023-08-29 21:41:20,672 INFO L137 encePairwiseOnDemand]: 309/332 looper letters, 70 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-29 21:41:20,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 332 flow [2023-08-29 21:41:20,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-29 21:41:20,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552208835341366 [2023-08-29 21:41:20,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-29 21:41:20,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-29 21:41:20,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:20,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-29 21:41:20,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:20,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:20,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:20,678 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 174 flow. Second operand 3 states and 553 transitions. [2023-08-29 21:41:20,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 332 flow [2023-08-29 21:41:20,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:20,681 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 140 flow [2023-08-29 21:41:20,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-29 21:41:20,682 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-08-29 21:41:20,683 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 140 flow [2023-08-29 21:41:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:20,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:20,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:41:20,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:20,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 32093, now seen corresponding path program 1 times [2023-08-29 21:41:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:20,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979586633] [2023-08-29 21:41:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:20,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:20,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:20,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979586633] [2023-08-29 21:41:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979586633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:20,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:20,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823637057] [2023-08-29 21:41:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:20,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:20,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 332 [2023-08-29 21:41:20,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:20,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:20,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 332 [2023-08-29 21:41:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:21,353 INFO L130 PetriNetUnfolder]: 5943/10031 cut-off events. [2023-08-29 21:41:21,354 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-08-29 21:41:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19998 conditions, 10031 events. 5943/10031 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 72482 event pairs, 2808 based on Foata normal form. 0/6477 useless extension candidates. Maximal degree in co-relation 17052. Up to 9394 conditions per place. [2023-08-29 21:41:21,455 INFO L137 encePairwiseOnDemand]: 328/332 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-29 21:41:21,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 294 flow [2023-08-29 21:41:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 21:41:21,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190763052208835 [2023-08-29 21:41:21,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 21:41:21,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 21:41:21,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:21,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 21:41:21,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:21,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:21,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:21,460 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 140 flow. Second operand 3 states and 517 transitions. [2023-08-29 21:41:21,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 294 flow [2023-08-29 21:41:21,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:21,474 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2023-08-29 21:41:21,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-29 21:41:21,475 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2023-08-29 21:41:21,475 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2023-08-29 21:41:21,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:21,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:41:21,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:21,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash -401862952, now seen corresponding path program 1 times [2023-08-29 21:41:21,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:21,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167594385] [2023-08-29 21:41:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167594385] [2023-08-29 21:41:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167594385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:21,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900809517] [2023-08-29 21:41:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:21,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 332 [2023-08-29 21:41:21,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:21,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:21,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 332 [2023-08-29 21:41:21,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:22,252 INFO L130 PetriNetUnfolder]: 4750/8043 cut-off events. [2023-08-29 21:41:22,252 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2023-08-29 21:41:22,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16224 conditions, 8043 events. 4750/8043 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 55530 event pairs, 2036 based on Foata normal form. 226/5582 useless extension candidates. Maximal degree in co-relation 15545. Up to 6141 conditions per place. [2023-08-29 21:41:22,289 INFO L137 encePairwiseOnDemand]: 325/332 looper letters, 106 selfloop transitions, 7 changer transitions 0/124 dead transitions. [2023-08-29 21:41:22,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 124 transitions, 521 flow [2023-08-29 21:41:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:41:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:41:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 999 transitions. [2023-08-29 21:41:22,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015060240963856 [2023-08-29 21:41:22,293 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 999 transitions. [2023-08-29 21:41:22,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 999 transitions. [2023-08-29 21:41:22,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:22,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 999 transitions. [2023-08-29 21:41:22,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:22,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 332.0) internal successors, (2324), 7 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:22,299 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 332.0) internal successors, (2324), 7 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:22,300 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 6 states and 999 transitions. [2023-08-29 21:41:22,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 124 transitions, 521 flow [2023-08-29 21:41:22,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 124 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:22,303 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 160 flow [2023-08-29 21:41:22,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-29 21:41:22,304 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-08-29 21:41:22,305 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 160 flow [2023-08-29 21:41:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:22,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:22,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:41:22,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:22,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -402116582, now seen corresponding path program 1 times [2023-08-29 21:41:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:22,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321331112] [2023-08-29 21:41:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:22,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321331112] [2023-08-29 21:41:22,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321331112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963741377] [2023-08-29 21:41:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:22,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:22,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:22,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:22,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:41:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:22,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:22,497 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:41:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:22,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:22,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963741377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:22,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:22,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:41:22,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679001665] [2023-08-29 21:41:22,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:22,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:41:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:41:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:22,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 332 [2023-08-29 21:41:22,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:22,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:22,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 332 [2023-08-29 21:41:22,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:23,251 INFO L130 PetriNetUnfolder]: 4351/7163 cut-off events. [2023-08-29 21:41:23,252 INFO L131 PetriNetUnfolder]: For 562/562 co-relation queries the response was YES. [2023-08-29 21:41:23,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15419 conditions, 7163 events. 4351/7163 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 49946 event pairs, 1 based on Foata normal form. 12/5124 useless extension candidates. Maximal degree in co-relation 11627. Up to 5463 conditions per place. [2023-08-29 21:41:23,293 INFO L137 encePairwiseOnDemand]: 326/332 looper letters, 100 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2023-08-29 21:41:23,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 494 flow [2023-08-29 21:41:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:41:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:41:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 848 transitions. [2023-08-29 21:41:23,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108433734939759 [2023-08-29 21:41:23,297 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 848 transitions. [2023-08-29 21:41:23,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 848 transitions. [2023-08-29 21:41:23,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:23,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 848 transitions. [2023-08-29 21:41:23,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:23,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:23,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:23,302 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 160 flow. Second operand 5 states and 848 transitions. [2023-08-29 21:41:23,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 494 flow [2023-08-29 21:41:23,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:23,308 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 173 flow [2023-08-29 21:41:23,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-08-29 21:41:23,309 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-08-29 21:41:23,309 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 173 flow [2023-08-29 21:41:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.71428571428572) internal successors, (1048), 7 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:23,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:23,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:23,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 21:41:23,514 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,SelfDestructingSolverStorable9 [2023-08-29 21:41:23,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:23,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash 427149082, now seen corresponding path program 1 times [2023-08-29 21:41:23,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:23,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588630817] [2023-08-29 21:41:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:23,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588630817] [2023-08-29 21:41:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588630817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:23,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:23,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:23,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254227598] [2023-08-29 21:41:23,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:23,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:23,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 332 [2023-08-29 21:41:23,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:23,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:23,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 332 [2023-08-29 21:41:23,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:24,183 INFO L130 PetriNetUnfolder]: 3605/6127 cut-off events. [2023-08-29 21:41:24,183 INFO L131 PetriNetUnfolder]: For 1361/1361 co-relation queries the response was YES. [2023-08-29 21:41:24,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13705 conditions, 6127 events. 3605/6127 cut-off events. For 1361/1361 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 39755 event pairs, 2391 based on Foata normal form. 0/4876 useless extension candidates. Maximal degree in co-relation 13154. Up to 4172 conditions per place. [2023-08-29 21:41:24,213 INFO L137 encePairwiseOnDemand]: 319/332 looper letters, 105 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2023-08-29 21:41:24,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 124 transitions, 557 flow [2023-08-29 21:41:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:41:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:41:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 807 transitions. [2023-08-29 21:41:24,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48614457831325303 [2023-08-29 21:41:24,216 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 807 transitions. [2023-08-29 21:41:24,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 807 transitions. [2023-08-29 21:41:24,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:24,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 807 transitions. [2023-08-29 21:41:24,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,220 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 173 flow. Second operand 5 states and 807 transitions. [2023-08-29 21:41:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 124 transitions, 557 flow [2023-08-29 21:41:24,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 539 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:24,226 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 223 flow [2023-08-29 21:41:24,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-29 21:41:24,227 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2023-08-29 21:41:24,228 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 223 flow [2023-08-29 21:41:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:24,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:24,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:41:24,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:24,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1263681037, now seen corresponding path program 1 times [2023-08-29 21:41:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:24,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437150963] [2023-08-29 21:41:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:41:24,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437150963] [2023-08-29 21:41:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437150963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314955461] [2023-08-29 21:41:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:24,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:24,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:24,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:41:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:41:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:41:24,426 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:41:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:41:24,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:24,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314955461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:24,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-29 21:41:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123950191] [2023-08-29 21:41:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:24,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 332 [2023-08-29 21:41:24,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:24,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 332 [2023-08-29 21:41:24,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:24,880 INFO L130 PetriNetUnfolder]: 2787/5228 cut-off events. [2023-08-29 21:41:24,880 INFO L131 PetriNetUnfolder]: For 3108/3303 co-relation queries the response was YES. [2023-08-29 21:41:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12213 conditions, 5228 events. 2787/5228 cut-off events. For 3108/3303 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 36645 event pairs, 112 based on Foata normal form. 183/4442 useless extension candidates. Maximal degree in co-relation 10706. Up to 4320 conditions per place. [2023-08-29 21:41:24,906 INFO L137 encePairwiseOnDemand]: 328/332 looper letters, 76 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-29 21:41:24,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 505 flow [2023-08-29 21:41:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 663 transitions. [2023-08-29 21:41:24,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4992469879518072 [2023-08-29 21:41:24,908 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 663 transitions. [2023-08-29 21:41:24,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 663 transitions. [2023-08-29 21:41:24,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:24,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 663 transitions. [2023-08-29 21:41:24,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,912 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,912 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 223 flow. Second operand 4 states and 663 transitions. [2023-08-29 21:41:24,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 505 flow [2023-08-29 21:41:24,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:24,915 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 216 flow [2023-08-29 21:41:24,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-08-29 21:41:24,916 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-29 21:41:24,916 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 216 flow [2023-08-29 21:41:24,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:24,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:24,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:25,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:25,122 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:25,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash 519404579, now seen corresponding path program 1 times [2023-08-29 21:41:25,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:25,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522947996] [2023-08-29 21:41:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:25,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522947996] [2023-08-29 21:41:25,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522947996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731818453] [2023-08-29 21:41:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:25,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:25,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:25,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:25,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:41:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 21:41:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:25,302 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:41:25,303 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:41:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:41:25,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:25,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731818453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:25,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:25,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-29 21:41:25,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284966899] [2023-08-29 21:41:25,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:25,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:25,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:25,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 332 [2023-08-29 21:41:25,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:25,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 332 [2023-08-29 21:41:25,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:25,799 INFO L130 PetriNetUnfolder]: 2209/4167 cut-off events. [2023-08-29 21:41:25,800 INFO L131 PetriNetUnfolder]: For 1787/1913 co-relation queries the response was YES. [2023-08-29 21:41:25,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9982 conditions, 4167 events. 2209/4167 cut-off events. For 1787/1913 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 27939 event pairs, 183 based on Foata normal form. 119/3862 useless extension candidates. Maximal degree in co-relation 8346. Up to 2353 conditions per place. [2023-08-29 21:41:25,812 INFO L137 encePairwiseOnDemand]: 324/332 looper letters, 76 selfloop transitions, 10 changer transitions 2/98 dead transitions. [2023-08-29 21:41:25,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 512 flow [2023-08-29 21:41:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 675 transitions. [2023-08-29 21:41:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082831325301205 [2023-08-29 21:41:25,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 675 transitions. [2023-08-29 21:41:25,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 675 transitions. [2023-08-29 21:41:25,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:25,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 675 transitions. [2023-08-29 21:41:25,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.75) internal successors, (675), 4 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,819 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 216 flow. Second operand 4 states and 675 transitions. [2023-08-29 21:41:25,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 512 flow [2023-08-29 21:41:25,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 508 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:25,823 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 277 flow [2023-08-29 21:41:25,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2023-08-29 21:41:25,823 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-08-29 21:41:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 277 flow [2023-08-29 21:41:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:25,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 21:41:26,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:26,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:26,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1301941732, now seen corresponding path program 1 times [2023-08-29 21:41:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577983375] [2023-08-29 21:41:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:26,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577983375] [2023-08-29 21:41:26,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577983375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973141501] [2023-08-29 21:41:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:26,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:26,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:26,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:26,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:41:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:41:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:26,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973141501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:26,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:26,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:41:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186431279] [2023-08-29 21:41:26,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:26,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:41:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:41:26,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:41:26,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 332 [2023-08-29 21:41:26,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 277 flow. Second operand has 9 states, 9 states have (on average 153.44444444444446) internal successors, (1381), 9 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:26,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:26,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 332 [2023-08-29 21:41:26,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:26,301 INFO L130 PetriNetUnfolder]: 376/688 cut-off events. [2023-08-29 21:41:26,301 INFO L131 PetriNetUnfolder]: For 356/385 co-relation queries the response was YES. [2023-08-29 21:41:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 688 events. 376/688 cut-off events. For 356/385 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3180 event pairs, 0 based on Foata normal form. 81/768 useless extension candidates. Maximal degree in co-relation 1670. Up to 450 conditions per place. [2023-08-29 21:41:26,302 INFO L137 encePairwiseOnDemand]: 329/332 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-29 21:41:26,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 267 flow [2023-08-29 21:41:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:41:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:41:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-08-29 21:41:26,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843373493975904 [2023-08-29 21:41:26,305 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-08-29 21:41:26,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-08-29 21:41:26,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:26,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-08-29 21:41:26,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:26,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:26,309 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:26,309 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 277 flow. Second operand 5 states and 804 transitions. [2023-08-29 21:41:26,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 267 flow [2023-08-29 21:41:26,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 225 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-08-29 21:41:26,310 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 21:41:26,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=332, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-29 21:41:26,311 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -24 predicate places. [2023-08-29 21:41:26,311 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 21:41:26,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 153.44444444444446) internal successors, (1381), 9 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:26,312 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 32 remaining) [2023-08-29 21:41:26,312 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2023-08-29 21:41:26,312 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2023-08-29 21:41:26,312 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2023-08-29 21:41:26,312 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2023-08-29 21:41:26,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2023-08-29 21:41:26,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2023-08-29 21:41:26,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2023-08-29 21:41:26,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2023-08-29 21:41:26,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 32 remaining) [2023-08-29 21:41:26,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2023-08-29 21:41:26,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2023-08-29 21:41:26,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 32 remaining) [2023-08-29 21:41:26,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2023-08-29 21:41:26,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2023-08-29 21:41:26,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (1 of 32 remaining) [2023-08-29 21:41:26,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2023-08-29 21:41:26,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-29 21:41:26,520 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,SelfDestructingSolverStorable13 [2023-08-29 21:41:26,520 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:26,522 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:26,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:26,543 INFO L130 PetriNetUnfolder]: 31/295 cut-off events. [2023-08-29 21:41:26,543 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:26,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 295 events. 31/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-08-29 21:41:26,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:26,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:26,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:26,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:26,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:26,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 178 transitions, 374 flow [2023-08-29 21:41:26,566 INFO L130 PetriNetUnfolder]: 31/295 cut-off events. [2023-08-29 21:41:26,567 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:26,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 295 events. 31/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-08-29 21:41:26,572 INFO L119 LiptonReduction]: Number of co-enabled transitions 12464 [2023-08-29 21:41:29,425 INFO L134 LiptonReduction]: Checked pairs total: 31137 [2023-08-29 21:41:29,426 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-29 21:41:29,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:29,429 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;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:29,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:29,435 INFO L130 PetriNetUnfolder]: 10/84 cut-off events. [2023-08-29 21:41:29,436 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:41:29,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:29,436 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:41:29,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:29,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash -461105908, now seen corresponding path program 1 times [2023-08-29 21:41:29,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:29,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476900425] [2023-08-29 21:41:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:29,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:29,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:29,471 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:29,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:29,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:41:29,471 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:29,472 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:29,472 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:29,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:41:29,497 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:41:29,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 221 transitions, 472 flow [2023-08-29 21:41:29,536 INFO L130 PetriNetUnfolder]: 50/452 cut-off events. [2023-08-29 21:41:29,536 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:29,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 452 events. 50/452 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 303. Up to 16 conditions per place. [2023-08-29 21:41:29,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 221 transitions, 472 flow [2023-08-29 21:41:29,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 221 transitions, 472 flow [2023-08-29 21:41:29,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:29,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 221 transitions, 472 flow [2023-08-29 21:41:29,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 221 transitions, 472 flow [2023-08-29 21:41:29,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 221 transitions, 472 flow [2023-08-29 21:41:29,578 INFO L130 PetriNetUnfolder]: 50/452 cut-off events. [2023-08-29 21:41:29,578 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:29,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 452 events. 50/452 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 303. Up to 16 conditions per place. [2023-08-29 21:41:29,592 INFO L119 LiptonReduction]: Number of co-enabled transitions 24108 [2023-08-29 21:41:32,346 INFO L134 LiptonReduction]: Checked pairs total: 71190 [2023-08-29 21:41:32,346 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-29 21:41:32,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:32,348 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;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:32,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-29 21:41:32,349 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:41:32,349 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:32,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:32,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:32,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:32,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash 51216, now seen corresponding path program 1 times [2023-08-29 21:41:32,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:32,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254161974] [2023-08-29 21:41:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:32,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:32,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:32,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254161974] [2023-08-29 21:41:32,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254161974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:32,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:32,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:32,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193416356] [2023-08-29 21:41:32,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:32,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:32,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:32,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:32,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:32,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 401 [2023-08-29 21:41:32,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 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) [2023-08-29 21:41:32,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:32,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 401 [2023-08-29 21:41:32,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:41,683 INFO L130 PetriNetUnfolder]: 112902/166733 cut-off events. [2023-08-29 21:41:41,683 INFO L131 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2023-08-29 21:41:42,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324644 conditions, 166733 events. 112902/166733 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 5248. Compared 1402704 event pairs, 97500 based on Foata normal form. 9334/117743 useless extension candidates. Maximal degree in co-relation 75083. Up to 135312 conditions per place. [2023-08-29 21:41:42,670 INFO L137 encePairwiseOnDemand]: 370/401 looper letters, 94 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2023-08-29 21:41:42,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 452 flow [2023-08-29 21:41:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-08-29 21:41:42,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802161263507897 [2023-08-29 21:41:42,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-08-29 21:41:42,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-08-29 21:41:42,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:42,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-08-29 21:41:42,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:42,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:42,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:42,676 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 240 flow. Second operand 3 states and 698 transitions. [2023-08-29 21:41:42,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 452 flow [2023-08-29 21:41:42,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 452 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:42,680 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 190 flow [2023-08-29 21:41:42,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-08-29 21:41:42,681 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2023-08-29 21:41:42,681 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 190 flow [2023-08-29 21:41:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 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) [2023-08-29 21:41:42,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:42,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:42,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:41:42,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:42,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:42,682 INFO L85 PathProgramCache]: Analyzing trace with hash 51217, now seen corresponding path program 1 times [2023-08-29 21:41:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:42,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479310414] [2023-08-29 21:41:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479310414] [2023-08-29 21:41:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479310414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:42,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:42,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507477619] [2023-08-29 21:41:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:42,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:42,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:42,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 401 [2023-08-29 21:41:42,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:42,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:42,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 401 [2023-08-29 21:41:42,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:52,059 INFO L130 PetriNetUnfolder]: 112901/169300 cut-off events. [2023-08-29 21:41:52,059 INFO L131 PetriNetUnfolder]: For 4698/4698 co-relation queries the response was YES. [2023-08-29 21:41:52,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333144 conditions, 169300 events. 112901/169300 cut-off events. For 4698/4698 co-relation queries the response was YES. Maximal size of possible extension queue 5424. Compared 1450138 event pairs, 73429 based on Foata normal form. 0/113396 useless extension candidates. Maximal degree in co-relation 283659. Up to 156344 conditions per place. [2023-08-29 21:41:52,882 INFO L137 encePairwiseOnDemand]: 397/401 looper letters, 73 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-29 21:41:52,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 370 flow [2023-08-29 21:41:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-29 21:41:52,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5278470490440565 [2023-08-29 21:41:52,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-29 21:41:52,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-29 21:41:52,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:52,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-29 21:41:52,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,913 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 190 flow. Second operand 3 states and 635 transitions. [2023-08-29 21:41:52,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 370 flow [2023-08-29 21:41:53,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:53,308 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 198 flow [2023-08-29 21:41:53,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-08-29 21:41:53,309 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -5 predicate places. [2023-08-29 21:41:53,309 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 198 flow [2023-08-29 21:41:53,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:53,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:53,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:41:53,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:53,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash 98785553, now seen corresponding path program 1 times [2023-08-29 21:41:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:53,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130472893] [2023-08-29 21:41:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:53,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:53,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130472893] [2023-08-29 21:41:53,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130472893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881096969] [2023-08-29 21:41:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:53,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:53,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:53,389 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:53,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:41:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:53,476 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:41:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:53,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:53,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881096969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:53,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:53,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:53,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412225024] [2023-08-29 21:41:53,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:53,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 401 [2023-08-29 21:41:53,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:53,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 401 [2023-08-29 21:41:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:01,691 INFO L130 PetriNetUnfolder]: 107231/152836 cut-off events. [2023-08-29 21:42:01,691 INFO L131 PetriNetUnfolder]: For 10865/10865 co-relation queries the response was YES. [2023-08-29 21:42:01,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315170 conditions, 152836 events. 107231/152836 cut-off events. For 10865/10865 co-relation queries the response was YES. Maximal size of possible extension queue 4844. Compared 1223805 event pairs, 43 based on Foata normal form. 14/105915 useless extension candidates. Maximal degree in co-relation 33893. Up to 113602 conditions per place. [2023-08-29 21:42:02,354 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 183 selfloop transitions, 8 changer transitions 0/208 dead transitions. [2023-08-29 21:42:02,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 208 transitions, 848 flow [2023-08-29 21:42:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1287 transitions. [2023-08-29 21:42:02,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349127182044888 [2023-08-29 21:42:02,357 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1287 transitions. [2023-08-29 21:42:02,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1287 transitions. [2023-08-29 21:42:02,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:02,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1287 transitions. [2023-08-29 21:42:02,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.5) internal successors, (1287), 6 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,362 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,362 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 198 flow. Second operand 6 states and 1287 transitions. [2023-08-29 21:42:02,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 208 transitions, 848 flow [2023-08-29 21:42:02,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 208 transitions, 846 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:02,365 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 220 flow [2023-08-29 21:42:02,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2023-08-29 21:42:02,366 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -1 predicate places. [2023-08-29 21:42:02,366 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 220 flow [2023-08-29 21:42:02,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:02,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:02,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 21:42:02,570 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 [2023-08-29 21:42:02,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:02,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 99100808, now seen corresponding path program 1 times [2023-08-29 21:42:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:02,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140566829] [2023-08-29 21:42:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:02,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:02,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140566829] [2023-08-29 21:42:02,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140566829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:02,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:02,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:42:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083890761] [2023-08-29 21:42:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:42:02,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:42:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:42:02,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 401 [2023-08-29 21:42:02,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:02,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 401 [2023-08-29 21:42:02,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:09,486 INFO L130 PetriNetUnfolder]: 85915/129302 cut-off events. [2023-08-29 21:42:09,486 INFO L131 PetriNetUnfolder]: For 17504/17504 co-relation queries the response was YES. [2023-08-29 21:42:09,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264393 conditions, 129302 events. 85915/129302 cut-off events. For 17504/17504 co-relation queries the response was YES. Maximal size of possible extension queue 4001. Compared 1119892 event pairs, 4097 based on Foata normal form. 2691/99640 useless extension candidates. Maximal degree in co-relation 168904. Up to 94815 conditions per place. [2023-08-29 21:42:10,105 INFO L137 encePairwiseOnDemand]: 394/401 looper letters, 154 selfloop transitions, 11 changer transitions 0/182 dead transitions. [2023-08-29 21:42:10,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 182 transitions, 798 flow [2023-08-29 21:42:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1255 transitions. [2023-08-29 21:42:10,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216126350789693 [2023-08-29 21:42:10,108 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1255 transitions. [2023-08-29 21:42:10,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1255 transitions. [2023-08-29 21:42:10,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:10,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1255 transitions. [2023-08-29 21:42:10,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.16666666666666) internal successors, (1255), 6 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:10,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:10,112 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:10,112 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 220 flow. Second operand 6 states and 1255 transitions. [2023-08-29 21:42:10,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 182 transitions, 798 flow [2023-08-29 21:42:10,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 182 transitions, 782 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:10,167 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 241 flow [2023-08-29 21:42:10,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2023-08-29 21:42:10,168 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -1 predicate places. [2023-08-29 21:42:10,168 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 241 flow [2023-08-29 21:42:10,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:10,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:10,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:42:10,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:10,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1222842776, now seen corresponding path program 1 times [2023-08-29 21:42:10,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:10,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7025881] [2023-08-29 21:42:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:10,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:10,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7025881] [2023-08-29 21:42:10,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7025881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:10,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:10,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:42:10,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648612383] [2023-08-29 21:42:10,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:10,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:42:10,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:10,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:42:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:42:10,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 401 [2023-08-29 21:42:10,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:10,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:10,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 401 [2023-08-29 21:42:10,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:16,229 INFO L130 PetriNetUnfolder]: 73623/110646 cut-off events. [2023-08-29 21:42:16,230 INFO L131 PetriNetUnfolder]: For 19913/19913 co-relation queries the response was YES. [2023-08-29 21:42:16,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230440 conditions, 110646 events. 73623/110646 cut-off events. For 19913/19913 co-relation queries the response was YES. Maximal size of possible extension queue 3412. Compared 904311 event pairs, 36522 based on Foata normal form. 0/84466 useless extension candidates. Maximal degree in co-relation 179396. Up to 71795 conditions per place. [2023-08-29 21:42:16,765 INFO L137 encePairwiseOnDemand]: 388/401 looper letters, 155 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2023-08-29 21:42:16,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 184 transitions, 816 flow [2023-08-29 21:42:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:42:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:42:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2023-08-29 21:42:16,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516209476309227 [2023-08-29 21:42:16,769 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2023-08-29 21:42:16,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2023-08-29 21:42:16,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:16,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2023-08-29 21:42:16,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:16,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:16,773 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:16,773 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 241 flow. Second operand 5 states and 1035 transitions. [2023-08-29 21:42:16,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 184 transitions, 816 flow [2023-08-29 21:42:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 184 transitions, 815 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:17,050 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 318 flow [2023-08-29 21:42:17,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2023-08-29 21:42:17,051 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2023-08-29 21:42:17,051 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 318 flow [2023-08-29 21:42:17,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:17,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:17,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:17,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:42:17,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:17,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:17,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1176123125, now seen corresponding path program 1 times [2023-08-29 21:42:17,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:17,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346618150] [2023-08-29 21:42:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:42:17,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346618150] [2023-08-29 21:42:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346618150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:17,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722049595] [2023-08-29 21:42:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:17,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:17,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:17,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:42:17,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:42:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:17,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:42:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:42:17,217 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:42:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:42:17,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:42:17,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722049595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:17,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:42:17,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-29 21:42:17,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236011386] [2023-08-29 21:42:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:17,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:17,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:17,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 401 [2023-08-29 21:42:17,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:17,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:17,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 401 [2023-08-29 21:42:17,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:22,764 INFO L130 PetriNetUnfolder]: 61105/98255 cut-off events. [2023-08-29 21:42:22,764 INFO L131 PetriNetUnfolder]: For 54431/54691 co-relation queries the response was YES. [2023-08-29 21:42:22,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219834 conditions, 98255 events. 61105/98255 cut-off events. For 54431/54691 co-relation queries the response was YES. Maximal size of possible extension queue 2765. Compared 882276 event pairs, 3281 based on Foata normal form. 2200/81056 useless extension candidates. Maximal degree in co-relation 195028. Up to 80910 conditions per place. [2023-08-29 21:42:23,274 INFO L137 encePairwiseOnDemand]: 397/401 looper letters, 115 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2023-08-29 21:42:23,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 765 flow [2023-08-29 21:42:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 830 transitions. [2023-08-29 21:42:23,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174563591022444 [2023-08-29 21:42:23,277 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 830 transitions. [2023-08-29 21:42:23,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 830 transitions. [2023-08-29 21:42:23,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:23,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 830 transitions. [2023-08-29 21:42:23,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:23,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:23,280 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:23,280 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 318 flow. Second operand 4 states and 830 transitions. [2023-08-29 21:42:23,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 765 flow [2023-08-29 21:42:23,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 134 transitions, 744 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:23,326 INFO L231 Difference]: Finished difference. Result has 92 places, 83 transitions, 307 flow [2023-08-29 21:42:23,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=92, PETRI_TRANSITIONS=83} [2023-08-29 21:42:23,326 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2023-08-29 21:42:23,326 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 83 transitions, 307 flow [2023-08-29 21:42:23,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:23,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:23,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:23,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 21:42:23,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:23,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:23,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2100072823, now seen corresponding path program 1 times [2023-08-29 21:42:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735993811] [2023-08-29 21:42:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:42:23,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:23,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735993811] [2023-08-29 21:42:23,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735993811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:23,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:23,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:42:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831300746] [2023-08-29 21:42:23,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:23,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:42:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:42:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:42:23,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 401 [2023-08-29 21:42:23,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 83 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:23,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:23,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 401 [2023-08-29 21:42:23,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:29,372 INFO L130 PetriNetUnfolder]: 66430/101639 cut-off events. [2023-08-29 21:42:29,373 INFO L131 PetriNetUnfolder]: For 42934/43270 co-relation queries the response was YES. [2023-08-29 21:42:29,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236783 conditions, 101639 events. 66430/101639 cut-off events. For 42934/43270 co-relation queries the response was YES. Maximal size of possible extension queue 2951. Compared 828784 event pairs, 14699 based on Foata normal form. 0/84156 useless extension candidates. Maximal degree in co-relation 190100. Up to 55223 conditions per place. [2023-08-29 21:42:29,874 INFO L137 encePairwiseOnDemand]: 389/401 looper letters, 152 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2023-08-29 21:42:29,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 188 transitions, 984 flow [2023-08-29 21:42:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:42:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:42:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1025 transitions. [2023-08-29 21:42:29,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112219451371571 [2023-08-29 21:42:29,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1025 transitions. [2023-08-29 21:42:29,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1025 transitions. [2023-08-29 21:42:29,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:29,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1025 transitions. [2023-08-29 21:42:29,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,880 INFO L175 Difference]: Start difference. First operand has 92 places, 83 transitions, 307 flow. Second operand 5 states and 1025 transitions. [2023-08-29 21:42:29,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 188 transitions, 984 flow [2023-08-29 21:42:30,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 188 transitions, 980 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:30,005 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 487 flow [2023-08-29 21:42:30,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=487, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2023-08-29 21:42:30,005 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 9 predicate places. [2023-08-29 21:42:30,005 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 487 flow [2023-08-29 21:42:30,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:30,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:30,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:42:30,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:30,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 404290168, now seen corresponding path program 1 times [2023-08-29 21:42:30,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:30,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246056661] [2023-08-29 21:42:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:30,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246056661] [2023-08-29 21:42:30,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246056661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:30,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084453749] [2023-08-29 21:42:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:30,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:30,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:30,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:42:30,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:42:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:30,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:42:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:30,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084453749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:30,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:30,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:42:30,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528298608] [2023-08-29 21:42:30,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:42:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:42:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:42:30,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 401 [2023-08-29 21:42:30,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 487 flow. Second operand has 9 states, 9 states have (on average 188.44444444444446) internal successors, (1696), 9 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:30,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:30,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 401 [2023-08-29 21:42:30,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:31,059 INFO L130 PetriNetUnfolder]: 8860/14225 cut-off events. [2023-08-29 21:42:31,059 INFO L131 PetriNetUnfolder]: For 12862/13192 co-relation queries the response was YES. [2023-08-29 21:42:31,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37873 conditions, 14225 events. 8860/14225 cut-off events. For 12862/13192 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 99552 event pairs, 980 based on Foata normal form. 1260/14285 useless extension candidates. Maximal degree in co-relation 37859. Up to 8686 conditions per place. [2023-08-29 21:42:31,118 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 85 selfloop transitions, 4 changer transitions 6/107 dead transitions. [2023-08-29 21:42:31,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 524 flow [2023-08-29 21:42:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1213 transitions. [2023-08-29 21:42:31,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041562759767249 [2023-08-29 21:42:31,120 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1213 transitions. [2023-08-29 21:42:31,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1213 transitions. [2023-08-29 21:42:31,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:31,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1213 transitions. [2023-08-29 21:42:31,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 401.0) internal successors, (2807), 7 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,124 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 487 flow. Second operand 6 states and 1213 transitions. [2023-08-29 21:42:31,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 524 flow [2023-08-29 21:42:31,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 436 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-08-29 21:42:31,135 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 125 flow [2023-08-29 21:42:31,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-08-29 21:42:31,135 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -21 predicate places. [2023-08-29 21:42:31,135 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 125 flow [2023-08-29 21:42:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 188.44444444444446) internal successors, (1696), 9 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:31,136 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:31,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 21:42:31,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-29 21:42:31,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:31,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1958615785, now seen corresponding path program 1 times [2023-08-29 21:42:31,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:31,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910701838] [2023-08-29 21:42:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:31,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:42:31,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910701838] [2023-08-29 21:42:31,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910701838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321791609] [2023-08-29 21:42:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:31,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:31,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:42:31,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 21:42:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:42:31,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:31,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:42:31,482 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 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:42:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 21:42:31,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:42:31,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321791609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:31,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:42:31,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-29 21:42:31,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751064463] [2023-08-29 21:42:31,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:31,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:31,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 401 [2023-08-29 21:42:31,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:31,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 401 [2023-08-29 21:42:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:32,187 INFO L130 PetriNetUnfolder]: 5545/9496 cut-off events. [2023-08-29 21:42:32,187 INFO L131 PetriNetUnfolder]: For 2752/2752 co-relation queries the response was YES. [2023-08-29 21:42:32,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20262 conditions, 9496 events. 5545/9496 cut-off events. For 2752/2752 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 67445 event pairs, 904 based on Foata normal form. 0/8669 useless extension candidates. Maximal degree in co-relation 20254. Up to 6531 conditions per place. [2023-08-29 21:42:32,218 INFO L137 encePairwiseOnDemand]: 397/401 looper letters, 49 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-29 21:42:32,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 268 flow [2023-08-29 21:42:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 787 transitions. [2023-08-29 21:42:32,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906483790523691 [2023-08-29 21:42:32,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 787 transitions. [2023-08-29 21:42:32,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 787 transitions. [2023-08-29 21:42:32,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:32,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 787 transitions. [2023-08-29 21:42:32,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:32,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:32,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:32,223 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 125 flow. Second operand 4 states and 787 transitions. [2023-08-29 21:42:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 268 flow [2023-08-29 21:42:32,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:42:32,224 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 118 flow [2023-08-29 21:42:32,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=4, PETRI_FLOW=118, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-29 21:42:32,224 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -27 predicate places. [2023-08-29 21:42:32,224 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 118 flow [2023-08-29 21:42:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:32,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:32,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:32,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-29 21:42:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-29 21:42:32,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:42:32,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 587545444, now seen corresponding path program 1 times [2023-08-29 21:42:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:32,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346930321] [2023-08-29 21:42:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:32,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:42:32,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:32,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346930321] [2023-08-29 21:42:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346930321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:32,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:42:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504034710] [2023-08-29 21:42:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:42:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:42:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:42:32,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 401 [2023-08-29 21:42:32,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:32,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:32,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 401 [2023-08-29 21:42:32,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:33,021 INFO L130 PetriNetUnfolder]: 5545/8416 cut-off events. [2023-08-29 21:42:33,021 INFO L131 PetriNetUnfolder]: For 1361/1361 co-relation queries the response was YES. [2023-08-29 21:42:33,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19352 conditions, 8416 events. 5545/8416 cut-off events. For 1361/1361 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 50252 event pairs, 904 based on Foata normal form. 270/8669 useless extension candidates. Maximal degree in co-relation 19344. Up to 6531 conditions per place. [2023-08-29 21:42:33,037 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-29 21:42:33,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 256 flow [2023-08-29 21:42:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 745 transitions. [2023-08-29 21:42:33,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644638403990025 [2023-08-29 21:42:33,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 745 transitions. [2023-08-29 21:42:33,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 745 transitions. [2023-08-29 21:42:33,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:33,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 745 transitions. [2023-08-29 21:42:33,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.25) internal successors, (745), 4 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:33,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:33,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 401.0) internal successors, (2005), 5 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:33,041 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 118 flow. Second operand 4 states and 745 transitions. [2023-08-29 21:42:33,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 256 flow [2023-08-29 21:42:33,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:33,044 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-29 21:42:33,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-29 21:42:33,044 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -30 predicate places. [2023-08-29 21:42:33,045 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-29 21:42:33,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 40 remaining) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 40 remaining) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2023-08-29 21:42:33,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2023-08-29 21:42:33,046 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2023-08-29 21:42:33,047 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 40 remaining) [2023-08-29 21:42:33,048 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 40 remaining) [2023-08-29 21:42:33,049 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2023-08-29 21:42:33,049 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (2 of 40 remaining) [2023-08-29 21:42:33,049 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2023-08-29 21:42:33,049 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 40 remaining) [2023-08-29 21:42:33,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 21:42:33,049 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:33,049 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:33,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 221 transitions, 472 flow [2023-08-29 21:42:33,074 INFO L130 PetriNetUnfolder]: 50/452 cut-off events. [2023-08-29 21:42:33,074 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:42:33,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 452 events. 50/452 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 303. Up to 16 conditions per place. [2023-08-29 21:42:33,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 221 transitions, 472 flow [2023-08-29 21:42:33,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 221 transitions, 472 flow [2023-08-29 21:42:33,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:33,077 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 221 transitions, 472 flow [2023-08-29 21:42:33,077 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 221 transitions, 472 flow [2023-08-29 21:42:33,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 221 transitions, 472 flow [2023-08-29 21:42:33,100 INFO L130 PetriNetUnfolder]: 50/452 cut-off events. [2023-08-29 21:42:33,100 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:42:33,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 452 events. 50/452 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 303. Up to 16 conditions per place. [2023-08-29 21:42:33,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 24108 [2023-08-29 21:42:36,085 INFO L134 LiptonReduction]: Checked pairs total: 64464 [2023-08-29 21:42:36,085 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-29 21:42:36,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:36,086 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;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:36,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:36,092 INFO L130 PetriNetUnfolder]: 19/134 cut-off events. [2023-08-29 21:42:36,093 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:42:36,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:36,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:42:36,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:36,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:36,093 INFO L85 PathProgramCache]: Analyzing trace with hash -977496668, now seen corresponding path program 1 times [2023-08-29 21:42:36,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235399864] [2023-08-29 21:42:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:36,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:36,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:36,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:36,111 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:36,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:36,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 21:42:36,112 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:36,112 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:36,112 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:36,112 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:42:36,133 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:42:36,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 264 transitions, 572 flow [2023-08-29 21:42:36,179 INFO L130 PetriNetUnfolder]: 81/693 cut-off events. [2023-08-29 21:42:36,179 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:42:36,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 693 events. 81/693 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3111 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 472. Up to 32 conditions per place. [2023-08-29 21:42:36,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 264 transitions, 572 flow [2023-08-29 21:42:36,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 264 transitions, 572 flow [2023-08-29 21:42:36,224 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:36,224 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 240 places, 264 transitions, 572 flow [2023-08-29 21:42:36,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 240 places, 264 transitions, 572 flow [2023-08-29 21:42:36,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 264 transitions, 572 flow [2023-08-29 21:42:36,274 INFO L130 PetriNetUnfolder]: 81/693 cut-off events. [2023-08-29 21:42:36,274 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:42:36,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 693 events. 81/693 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3111 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 472. Up to 32 conditions per place. [2023-08-29 21:42:36,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 39360 [2023-08-29 21:42:39,163 INFO L134 LiptonReduction]: Checked pairs total: 111950 [2023-08-29 21:42:39,164 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-29 21:42:39,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:39,165 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;@6be2d61a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:39,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-29 21:42:39,166 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:42:39,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:39,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:39,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:39,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 21:42:39,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash 73695, now seen corresponding path program 1 times [2023-08-29 21:42:39,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:39,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271010264] [2023-08-29 21:42:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:39,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:39,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271010264] [2023-08-29 21:42:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271010264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:39,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:39,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251754672] [2023-08-29 21:42:39,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:39,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:39,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:39,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 482 [2023-08-29 21:42:39,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:39,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 482 [2023-08-29 21:42:39,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand