./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.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 eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:02:06,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:02:06,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:02:06,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:02:06,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:02:06,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:02:06,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:02:06,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:02:06,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:02:06,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:02:06,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:02:06,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:02:06,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:02:06,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:02:06,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:02:06,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:02:06,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:02:06,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:02:06,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:02:06,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:02:06,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:02:06,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:02:06,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:02:06,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:02:06,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:02:06,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:02:06,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:02:06,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:02:06,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:02:06,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:02:06,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:02:06,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:02:06,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:02:06,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:02:06,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:02:06,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:02:06,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:02:06,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:02:06,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:02:06,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:02:06,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:02:06,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:02:07,001 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:02:07,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:02:07,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:02:07,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:02:07,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:02:07,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:02:07,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:02:07,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:02:07,005 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:02:07,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:02:07,006 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:02:07,006 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:02:07,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:02:07,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:02:07,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:02:07,007 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:02:07,007 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:02:07,007 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:02:07,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:02:07,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:02:07,008 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:02:07,008 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:02:07,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:02:07,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:02:07,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:02:07,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:07,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:02:07,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:02:07,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:02:07,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:02:07,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:02:07,010 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:02:07,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:02:07,010 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:02:07,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:02:07,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:02:07,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:02:07,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:02:07,358 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:02:07,358 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:02:07,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-30 04:02:08,531 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:02:08,753 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:02:08,754 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2023-08-30 04:02:08,772 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114055d92/c28ef88996934e3aa9e33b253c7b5ec9/FLAGb6a8d0f94 [2023-08-30 04:02:08,785 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114055d92/c28ef88996934e3aa9e33b253c7b5ec9 [2023-08-30 04:02:08,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:02:08,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:02:08,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:08,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:02:08,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:02:08,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:08" (1/1) ... [2023-08-30 04:02:08,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e14852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:08, skipping insertion in model container [2023-08-30 04:02:08,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:08" (1/1) ... [2023-08-30 04:02:08,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:02:08,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:02:09,108 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_01-simple_racing.i[30176,30189] [2023-08-30 04:02:09,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:09,152 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:02:09,179 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_01-simple_racing.i[30176,30189] [2023-08-30 04:02:09,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:09,219 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:02:09,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09 WrapperNode [2023-08-30 04:02:09,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:09,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:09,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:02:09,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:02:09,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,269 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-08-30 04:02:09,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:09,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:02:09,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:02:09,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:02:09,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,305 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:02:09,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:02:09,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:02:09,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:02:09,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (1/1) ... [2023-08-30 04:02:09,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:09,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:02:09,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:02:09,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:02:09,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:02:09,390 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:02:09,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:02:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:02:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:02:09,391 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:02:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:02:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:02:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:02:09,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:02:09,393 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:02:09,562 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:02:09,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:02:09,892 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:02:09,898 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:02:09,904 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 04:02:09,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:09 BoogieIcfgContainer [2023-08-30 04:02:09,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:02:09,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:02:09,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:02:09,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:02:09,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:02:08" (1/3) ... [2023-08-30 04:02:09,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e735f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:09, skipping insertion in model container [2023-08-30 04:02:09,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:09" (2/3) ... [2023-08-30 04:02:09,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e735f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:09, skipping insertion in model container [2023-08-30 04:02:09,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:09" (3/3) ... [2023-08-30 04:02:09,915 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-08-30 04:02:09,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:02:09,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:02:09,931 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:02:10,011 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:02:10,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2023-08-30 04:02:10,154 INFO L130 PetriNetUnfolder]: 17/154 cut-off events. [2023-08-30 04:02:10,154 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:10,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 154 events. 17/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 04:02:10,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2023-08-30 04:02:10,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 114 transitions, 236 flow [2023-08-30 04:02:10,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:10,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 114 transitions, 236 flow [2023-08-30 04:02:10,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 114 transitions, 236 flow [2023-08-30 04:02:10,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2023-08-30 04:02:10,242 INFO L130 PetriNetUnfolder]: 17/154 cut-off events. [2023-08-30 04:02:10,242 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:10,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 154 events. 17/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 04:02:10,246 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-08-30 04:02:13,637 INFO L134 LiptonReduction]: Checked pairs total: 5138 [2023-08-30 04:02:13,637 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-30 04:02:13,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:13,656 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;@6a934382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:13,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:13,658 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:02:13,658 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:13,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:13,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:13,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:13,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash 13992, now seen corresponding path program 1 times [2023-08-30 04:02:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062225966] [2023-08-30 04:02:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:13,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062225966] [2023-08-30 04:02:13,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062225966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:13,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:13,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772961047] [2023-08-30 04:02:13,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:13,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:13,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 212 [2023-08-30 04:02:13,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:13,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:13,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 212 [2023-08-30 04:02:13,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:14,043 INFO L130 PetriNetUnfolder]: 113/267 cut-off events. [2023-08-30 04:02:14,044 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:02:14,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 267 events. 113/267 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 96 based on Foata normal form. 25/221 useless extension candidates. Maximal degree in co-relation 493. Up to 227 conditions per place. [2023-08-30 04:02:14,048 INFO L137 encePairwiseOnDemand]: 198/212 looper letters, 30 selfloop transitions, 2 changer transitions 2/36 dead transitions. [2023-08-30 04:02:14,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 148 flow [2023-08-30 04:02:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-30 04:02:14,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2023-08-30 04:02:14,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-30 04:02:14,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-30 04:02:14,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:14,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-30 04:02:14,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:14,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 04:02:14,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 04:02:14,115 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 327 transitions. [2023-08-30 04:02:14,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 148 flow [2023-08-30 04:02:14,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:14,132 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 64 flow [2023-08-30 04:02:14,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 04:02:14,137 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 04:02:14,137 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 64 flow [2023-08-30 04:02:14,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:14,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:14,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:14,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:02:14,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:14,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash 13990, now seen corresponding path program 1 times [2023-08-30 04:02:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231399016] [2023-08-30 04:02:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:14,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231399016] [2023-08-30 04:02:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231399016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:14,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185530062] [2023-08-30 04:02:14,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:14,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:14,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:14,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-08-30 04:02:14,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:14,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:14,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-08-30 04:02:14,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:14,358 INFO L130 PetriNetUnfolder]: 96/223 cut-off events. [2023-08-30 04:02:14,358 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 04:02:14,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 223 events. 96/223 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 77 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 434. Up to 210 conditions per place. [2023-08-30 04:02:14,360 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-30 04:02:14,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 148 flow [2023-08-30 04:02:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-30 04:02:14,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2023-08-30 04:02:14,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-30 04:02:14,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-30 04:02:14,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:14,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-30 04:02:14,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:14,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 04:02:14,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 04:02:14,367 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 64 flow. Second operand 3 states and 320 transitions. [2023-08-30 04:02:14,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 148 flow [2023-08-30 04:02:14,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:14,369 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 70 flow [2023-08-30 04:02:14,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 04:02:14,370 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-30 04:02:14,370 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 70 flow [2023-08-30 04:02:14,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:14,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:14,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:02:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:02:14,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:14,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 417115487, now seen corresponding path program 1 times [2023-08-30 04:02:14,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:14,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247601098] [2023-08-30 04:02:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247601098] [2023-08-30 04:02:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247601098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801016249] [2023-08-30 04:02:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:14,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:14,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:02:14,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:02:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:14,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:14,715 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 [2023-08-30 04:02:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:14,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:14,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801016249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:14,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:14,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:02:14,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044162915] [2023-08-30 04:02:14,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:02:14,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:14,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:02:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:02:14,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 212 [2023-08-30 04:02:14,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 92.875) internal successors, (743), 8 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) [2023-08-30 04:02:14,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:14,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 212 [2023-08-30 04:02:14,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:15,058 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2023-08-30 04:02:15,058 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:02:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 16/48 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-30 04:02:15,059 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 04:02:15,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2023-08-30 04:02:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:02:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:02:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 387 transitions. [2023-08-30 04:02:15,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563679245283019 [2023-08-30 04:02:15,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 387 transitions. [2023-08-30 04:02:15,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 387 transitions. [2023-08-30 04:02:15,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:15,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 387 transitions. [2023-08-30 04:02:15,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:15,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:15,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:15,069 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 4 states and 387 transitions. [2023-08-30 04:02:15,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2023-08-30 04:02:15,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:02:15,070 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2023-08-30 04:02:15,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-30 04:02:15,071 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -12 predicate places. [2023-08-30 04:02:15,072 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2023-08-30 04:02:15,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 92.875) internal successors, (743), 8 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) [2023-08-30 04:02:15,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:15,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:02:15,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:02:15,282 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 [2023-08-30 04:02:15,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:15,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 45678548, now seen corresponding path program 1 times [2023-08-30 04:02:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:15,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380440794] [2023-08-30 04:02:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:15,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:15,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:15,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:15,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:02:15,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:02:15,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:02:15,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:02:15,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:02:15,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:02:15,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:02:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:02:15,363 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:02:15,366 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:15,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:02:15,393 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:02:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-30 04:02:15,437 INFO L130 PetriNetUnfolder]: 31/253 cut-off events. [2023-08-30 04:02:15,441 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:02:15,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-30 04:02:15,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 144 transitions, 306 flow [2023-08-30 04:02:15,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 144 transitions, 306 flow [2023-08-30 04:02:15,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:15,448 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-30 04:02:15,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-30 04:02:15,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-30 04:02:15,475 INFO L130 PetriNetUnfolder]: 31/253 cut-off events. [2023-08-30 04:02:15,475 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:02:15,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 735 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-30 04:02:15,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-08-30 04:02:18,285 INFO L134 LiptonReduction]: Checked pairs total: 17440 [2023-08-30 04:02:18,286 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-30 04:02:18,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:18,288 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;@6a934382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:18,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:18,290 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:02:18,290 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:18,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:18,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:18,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:18,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash 22983, now seen corresponding path program 1 times [2023-08-30 04:02:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367514897] [2023-08-30 04:02:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:18,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367514897] [2023-08-30 04:02:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367514897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:18,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:18,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519272086] [2023-08-30 04:02:18,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:18,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 251 [2023-08-30 04:02:18,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:18,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:18,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 251 [2023-08-30 04:02:18,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:18,659 INFO L130 PetriNetUnfolder]: 1741/3197 cut-off events. [2023-08-30 04:02:18,660 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 04:02:18,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6117 conditions, 3197 events. 1741/3197 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 20421 event pairs, 1484 based on Foata normal form. 699/3319 useless extension candidates. Maximal degree in co-relation 3144. Up to 2459 conditions per place. [2023-08-30 04:02:18,675 INFO L137 encePairwiseOnDemand]: 231/251 looper letters, 44 selfloop transitions, 2 changer transitions 2/59 dead transitions. [2023-08-30 04:02:18,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 232 flow [2023-08-30 04:02:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-30 04:02:18,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564409030544488 [2023-08-30 04:02:18,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-30 04:02:18,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-30 04:02:18,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:18,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-30 04:02:18,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:18,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:18,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:18,682 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 419 transitions. [2023-08-30 04:02:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 232 flow [2023-08-30 04:02:18,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:18,684 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 108 flow [2023-08-30 04:02:18,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-30 04:02:18,685 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-30 04:02:18,685 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 108 flow [2023-08-30 04:02:18,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:18,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:18,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:18,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:02:18,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:18,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 22984, now seen corresponding path program 1 times [2023-08-30 04:02:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:18,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713469746] [2023-08-30 04:02:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:18,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:18,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713469746] [2023-08-30 04:02:18,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713469746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:18,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:18,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:18,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759167570] [2023-08-30 04:02:18,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:18,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:18,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:18,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 251 [2023-08-30 04:02:18,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:18,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:18,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 251 [2023-08-30 04:02:18,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:19,034 INFO L130 PetriNetUnfolder]: 1500/2681 cut-off events. [2023-08-30 04:02:19,035 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2023-08-30 04:02:19,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5291 conditions, 2681 events. 1500/2681 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16426 event pairs, 712 based on Foata normal form. 0/2370 useless extension candidates. Maximal degree in co-relation 4788. Up to 2461 conditions per place. [2023-08-30 04:02:19,047 INFO L137 encePairwiseOnDemand]: 247/251 looper letters, 38 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-30 04:02:19,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 204 flow [2023-08-30 04:02:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-30 04:02:19,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219123505976095 [2023-08-30 04:02:19,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-30 04:02:19,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-30 04:02:19,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:19,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-30 04:02:19,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,053 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 108 flow. Second operand 3 states and 393 transitions. [2023-08-30 04:02:19,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 204 flow [2023-08-30 04:02:19,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:19,060 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 118 flow [2023-08-30 04:02:19,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-08-30 04:02:19,063 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-30 04:02:19,064 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 118 flow [2023-08-30 04:02:19,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:19,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:02:19,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:02:19,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:19,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash -232744163, now seen corresponding path program 1 times [2023-08-30 04:02:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127005158] [2023-08-30 04:02:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127005158] [2023-08-30 04:02:19,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127005158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792055582] [2023-08-30 04:02:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:19,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:19,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:02:19,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:02:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:19,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:19,238 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 [2023-08-30 04:02:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:19,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:19,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792055582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:19,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:19,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:02:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606575614] [2023-08-30 04:02:19,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:19,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:02:19,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:02:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:02:19,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 251 [2023-08-30 04:02:19,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:19,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 251 [2023-08-30 04:02:19,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:19,726 INFO L130 PetriNetUnfolder]: 1347/2326 cut-off events. [2023-08-30 04:02:19,727 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-08-30 04:02:19,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 2326 events. 1347/2326 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 14166 event pairs, 51 based on Foata normal form. 7/2107 useless extension candidates. Maximal degree in co-relation 4104. Up to 1855 conditions per place. [2023-08-30 04:02:19,741 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 64 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-08-30 04:02:19,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 322 flow [2023-08-30 04:02:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:02:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:02:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 641 transitions. [2023-08-30 04:02:19,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107569721115538 [2023-08-30 04:02:19,744 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 641 transitions. [2023-08-30 04:02:19,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 641 transitions. [2023-08-30 04:02:19,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:19,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 641 transitions. [2023-08-30 04:02:19,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,750 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 251.0) internal successors, (1506), 6 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,750 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 118 flow. Second operand 5 states and 641 transitions. [2023-08-30 04:02:19,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 322 flow [2023-08-30 04:02:19,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:02:19,753 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 124 flow [2023-08-30 04:02:19,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-30 04:02:19,754 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-30 04:02:19,754 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 124 flow [2023-08-30 04:02:19,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 115.875) internal successors, (927), 8 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:19,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:19,755 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:02:19,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:02:19,963 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,SelfDestructingSolverStorable6 [2023-08-30 04:02:19,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:19,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash 804072915, now seen corresponding path program 1 times [2023-08-30 04:02:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:19,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215034758] [2023-08-30 04:02:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:19,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:20,009 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:20,010 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:20,010 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:02:20,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:02:20,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:02:20,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:02:20,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:02:20,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:02:20,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:02:20,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:02:20,012 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:02:20,013 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:20,013 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:02:20,036 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:02:20,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2023-08-30 04:02:20,087 INFO L130 PetriNetUnfolder]: 50/393 cut-off events. [2023-08-30 04:02:20,087 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:02:20,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 393 events. 50/393 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-30 04:02:20,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 174 transitions, 378 flow [2023-08-30 04:02:20,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 174 transitions, 378 flow [2023-08-30 04:02:20,095 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:20,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 174 transitions, 378 flow [2023-08-30 04:02:20,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 174 transitions, 378 flow [2023-08-30 04:02:20,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2023-08-30 04:02:20,129 INFO L130 PetriNetUnfolder]: 50/393 cut-off events. [2023-08-30 04:02:20,130 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:02:20,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 393 events. 50/393 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1331 event pairs, 1 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-30 04:02:20,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-08-30 04:02:22,804 INFO L134 LiptonReduction]: Checked pairs total: 35758 [2023-08-30 04:02:22,805 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-30 04:02:22,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:22,811 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;@6a934382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:22,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:22,812 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:02:22,812 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:22,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:22,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:22,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:22,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash 33516, now seen corresponding path program 1 times [2023-08-30 04:02:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563278171] [2023-08-30 04:02:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:22,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:22,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563278171] [2023-08-30 04:02:22,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563278171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:22,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:22,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:22,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903452460] [2023-08-30 04:02:22,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:22,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:22,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:22,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 299 [2023-08-30 04:02:22,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:22,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:22,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 299 [2023-08-30 04:02:22,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:26,636 INFO L130 PetriNetUnfolder]: 35207/52727 cut-off events. [2023-08-30 04:02:26,636 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2023-08-30 04:02:26,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103137 conditions, 52727 events. 35207/52727 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 379836 event pairs, 22873 based on Foata normal form. 10455/55436 useless extension candidates. Maximal degree in co-relation 8674. Up to 49660 conditions per place. [2023-08-30 04:02:26,939 INFO L137 encePairwiseOnDemand]: 275/299 looper letters, 55 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-30 04:02:26,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 286 flow [2023-08-30 04:02:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-30 04:02:26,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607580824972129 [2023-08-30 04:02:26,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-30 04:02:26,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-30 04:02:26,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:26,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-30 04:02:26,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:26,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:26,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:26,946 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 188 flow. Second operand 3 states and 503 transitions. [2023-08-30 04:02:26,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 286 flow [2023-08-30 04:02:26,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 286 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:26,950 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 160 flow [2023-08-30 04:02:26,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-30 04:02:26,952 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-30 04:02:26,952 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 160 flow [2023-08-30 04:02:26,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:26,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:26,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:26,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:02:26,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:26,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 33518, now seen corresponding path program 1 times [2023-08-30 04:02:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298087551] [2023-08-30 04:02:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:26,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:26,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298087551] [2023-08-30 04:02:26,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298087551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:26,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:26,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160195821] [2023-08-30 04:02:26,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:27,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-08-30 04:02:27,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:27,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:27,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-08-30 04:02:27,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:29,487 INFO L130 PetriNetUnfolder]: 28311/42030 cut-off events. [2023-08-30 04:02:29,488 INFO L131 PetriNetUnfolder]: For 2652/2652 co-relation queries the response was YES. [2023-08-30 04:02:29,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85175 conditions, 42030 events. 28311/42030 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 291392 event pairs, 25801 based on Foata normal form. 0/37982 useless extension candidates. Maximal degree in co-relation 85103. Up to 36555 conditions per place. [2023-08-30 04:02:29,723 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 67 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 04:02:29,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 342 flow [2023-08-30 04:02:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-30 04:02:29,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328874024526199 [2023-08-30 04:02:29,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-30 04:02:29,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-30 04:02:29,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:29,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-30 04:02:29,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:29,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:29,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:29,730 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 160 flow. Second operand 3 states and 478 transitions. [2023-08-30 04:02:29,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 342 flow [2023-08-30 04:02:29,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:02:29,735 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 158 flow [2023-08-30 04:02:29,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-30 04:02:29,737 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-30 04:02:29,737 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 158 flow [2023-08-30 04:02:29,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:29,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:29,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:02:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:02:29,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:29,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 916100972, now seen corresponding path program 1 times [2023-08-30 04:02:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:29,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205554071] [2023-08-30 04:02:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:29,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:29,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205554071] [2023-08-30 04:02:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205554071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853188392] [2023-08-30 04:02:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:29,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:29,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:02:29,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:02:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:29,914 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 [2023-08-30 04:02:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:29,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853188392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:29,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:29,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:02:29,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159693377] [2023-08-30 04:02:29,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:29,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:02:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:02:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:02:30,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-08-30 04:02:30,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 137.71428571428572) internal successors, (964), 7 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:30,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:30,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-08-30 04:02:30,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:32,407 INFO L130 PetriNetUnfolder]: 26682/39083 cut-off events. [2023-08-30 04:02:32,407 INFO L131 PetriNetUnfolder]: For 3854/3854 co-relation queries the response was YES. [2023-08-30 04:02:32,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82462 conditions, 39083 events. 26682/39083 cut-off events. For 3854/3854 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 272829 event pairs, 1192 based on Foata normal form. 9/37163 useless extension candidates. Maximal degree in co-relation 74351. Up to 29667 conditions per place. [2023-08-30 04:02:32,637 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 126 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2023-08-30 04:02:32,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 144 transitions, 606 flow [2023-08-30 04:02:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:02:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:02:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-08-30 04:02:32,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306577480490524 [2023-08-30 04:02:32,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-08-30 04:02:32,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-08-30 04:02:32,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:32,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-08-30 04:02:32,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:32,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:32,648 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:32,648 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 158 flow. Second operand 6 states and 952 transitions. [2023-08-30 04:02:32,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 144 transitions, 606 flow [2023-08-30 04:02:32,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 144 transitions, 600 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:32,873 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 172 flow [2023-08-30 04:02:32,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=172, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-08-30 04:02:32,874 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-30 04:02:32,874 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 172 flow [2023-08-30 04:02:32,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 137.71428571428572) internal successors, (964), 7 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:32,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:32,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:02:32,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:02:33,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:33,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:33,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -958365601, now seen corresponding path program 1 times [2023-08-30 04:02:33,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:33,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718099045] [2023-08-30 04:02:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:02:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718099045] [2023-08-30 04:02:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718099045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:33,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948231896] [2023-08-30 04:02:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:33,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 299 [2023-08-30 04:02:33,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:33,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:33,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 299 [2023-08-30 04:02:33,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:35,255 INFO L130 PetriNetUnfolder]: 26592/39608 cut-off events. [2023-08-30 04:02:35,255 INFO L131 PetriNetUnfolder]: For 6765/6765 co-relation queries the response was YES. [2023-08-30 04:02:35,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82421 conditions, 39608 events. 26592/39608 cut-off events. For 6765/6765 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 270923 event pairs, 11377 based on Foata normal form. 0/37684 useless extension candidates. Maximal degree in co-relation 44377. Up to 36552 conditions per place. [2023-08-30 04:02:35,412 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 66 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-30 04:02:35,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 394 flow [2023-08-30 04:02:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-30 04:02:35,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306577480490524 [2023-08-30 04:02:35,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-30 04:02:35,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-30 04:02:35,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:35,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-30 04:02:35,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:35,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:35,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:35,418 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 172 flow. Second operand 3 states and 476 transitions. [2023-08-30 04:02:35,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 394 flow [2023-08-30 04:02:35,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:35,425 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 191 flow [2023-08-30 04:02:35,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-30 04:02:35,425 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-30 04:02:35,425 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 191 flow [2023-08-30 04:02:35,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:35,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:35,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:02:35,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:02:35,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:35,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:35,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2118954669, now seen corresponding path program 1 times [2023-08-30 04:02:35,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:35,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156914737] [2023-08-30 04:02:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:35,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:35,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:35,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:35,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:35,468 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:02:35,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:02:35,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:02:35,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:02:35,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:02:35,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:02:35,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:02:35,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:02:35,470 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:02:35,470 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:35,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:02:35,491 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:02:35,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2023-08-30 04:02:35,551 INFO L130 PetriNetUnfolder]: 81/617 cut-off events. [2023-08-30 04:02:35,551 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:02:35,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 81/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2493 event pairs, 6 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-08-30 04:02:35,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 204 transitions, 452 flow [2023-08-30 04:02:35,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 204 transitions, 452 flow [2023-08-30 04:02:35,562 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:35,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 204 transitions, 452 flow [2023-08-30 04:02:35,562 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 204 transitions, 452 flow [2023-08-30 04:02:35,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2023-08-30 04:02:35,618 INFO L130 PetriNetUnfolder]: 81/617 cut-off events. [2023-08-30 04:02:35,618 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:02:35,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 81/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2493 event pairs, 6 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-08-30 04:02:35,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-08-30 04:02:38,986 INFO L134 LiptonReduction]: Checked pairs total: 59483 [2023-08-30 04:02:38,987 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 04:02:38,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:38,988 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;@6a934382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:38,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:02:38,990 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:02:38,990 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:38,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:38,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:38,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:02:38,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash 45485, now seen corresponding path program 1 times [2023-08-30 04:02:38,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:38,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206343806] [2023-08-30 04:02:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:38,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:39,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:39,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206343806] [2023-08-30 04:02:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206343806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:39,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:39,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:39,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205262696] [2023-08-30 04:02:39,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:39,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:39,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:39,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:39,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:39,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 344 [2023-08-30 04:02:39,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:39,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:39,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 344 [2023-08-30 04:02:39,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:04,944 INFO L130 PetriNetUnfolder]: 276210/381713 cut-off events. [2023-08-30 04:03:04,944 INFO L131 PetriNetUnfolder]: For 12213/12213 co-relation queries the response was YES. [2023-08-30 04:03:05,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750566 conditions, 381713 events. 276210/381713 cut-off events. For 12213/12213 co-relation queries the response was YES. Maximal size of possible extension queue 8563. Compared 3018939 event pairs, 229706 based on Foata normal form. 65615/406001 useless extension candidates. Maximal degree in co-relation 71768. Up to 301814 conditions per place. [2023-08-30 04:03:06,910 INFO L137 encePairwiseOnDemand]: 313/344 looper letters, 78 selfloop transitions, 2 changer transitions 1/99 dead transitions. [2023-08-30 04:03:06,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 404 flow [2023-08-30 04:03:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-30 04:03:06,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5881782945736435 [2023-08-30 04:03:06,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-30 04:03:06,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-30 04:03:06,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:06,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-30 04:03:06,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:06,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:06,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:06,917 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 240 flow. Second operand 3 states and 607 transitions. [2023-08-30 04:03:06,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 404 flow [2023-08-30 04:03:06,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:03:06,921 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 186 flow [2023-08-30 04:03:06,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-08-30 04:03:06,922 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-08-30 04:03:06,922 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 186 flow [2023-08-30 04:03:06,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:06,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:06,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:06,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:03:06,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:06,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash 45484, now seen corresponding path program 1 times [2023-08-30 04:03:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:06,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833994517] [2023-08-30 04:03:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:06,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:06,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833994517] [2023-08-30 04:03:06,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833994517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:06,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:06,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:06,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771135899] [2023-08-30 04:03:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:06,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 344 [2023-08-30 04:03:06,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:06,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:06,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 344 [2023-08-30 04:03:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:29,528 INFO L130 PetriNetUnfolder]: 253367/352994 cut-off events. [2023-08-30 04:03:29,529 INFO L131 PetriNetUnfolder]: For 17335/17335 co-relation queries the response was YES. [2023-08-30 04:03:30,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699000 conditions, 352994 events. 253367/352994 cut-off events. For 17335/17335 co-relation queries the response was YES. Maximal size of possible extension queue 7974. Compared 2793434 event pairs, 187350 based on Foata normal form. 0/327464 useless extension candidates. Maximal degree in co-relation 630052. Up to 331930 conditions per place. [2023-08-30 04:03:31,618 INFO L137 encePairwiseOnDemand]: 340/344 looper letters, 58 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-30 04:03:31,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 324 flow [2023-08-30 04:03:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:03:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:03:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-30 04:03:31,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281007751937985 [2023-08-30 04:03:31,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-30 04:03:31,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-30 04:03:31,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:31,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-30 04:03:31,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:31,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:31,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:31,625 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 186 flow. Second operand 3 states and 545 transitions. [2023-08-30 04:03:31,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 324 flow [2023-08-30 04:03:36,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:03:36,106 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 196 flow [2023-08-30 04:03:36,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-08-30 04:03:36,106 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2023-08-30 04:03:36,106 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 196 flow [2023-08-30 04:03:36,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:36,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:36,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:03:36,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:03:36,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:36,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash -906985292, now seen corresponding path program 1 times [2023-08-30 04:03:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:36,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144723148] [2023-08-30 04:03:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:36,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:36,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144723148] [2023-08-30 04:03:36,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144723148] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:03:36,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888886786] [2023-08-30 04:03:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:36,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:03:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:03:36,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:03:36,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:03:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:03:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:03:36,281 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 [2023-08-30 04:03:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:36,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:03:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:36,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888886786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:03:36,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:03:36,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:03:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381541760] [2023-08-30 04:03:36,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:03:36,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:03:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:03:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:03:36,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 344 [2023-08-30 04:03:36,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 158.875) internal successors, (1271), 8 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:36,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:36,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 344 [2023-08-30 04:03:36,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:03:54,105 INFO L130 PetriNetUnfolder]: 227813/304904 cut-off events. [2023-08-30 04:03:54,105 INFO L131 PetriNetUnfolder]: For 14695/14695 co-relation queries the response was YES. [2023-08-30 04:03:54,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620787 conditions, 304904 events. 227813/304904 cut-off events. For 14695/14695 co-relation queries the response was YES. Maximal size of possible extension queue 6757. Compared 2237603 event pairs, 7005 based on Foata normal form. 584/286172 useless extension candidates. Maximal degree in co-relation 88950. Up to 225005 conditions per place. [2023-08-30 04:03:56,050 INFO L137 encePairwiseOnDemand]: 338/344 looper letters, 150 selfloop transitions, 7 changer transitions 0/175 dead transitions. [2023-08-30 04:03:56,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 175 transitions, 722 flow [2023-08-30 04:03:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:03:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:03:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1263 transitions. [2023-08-30 04:03:56,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245016611295681 [2023-08-30 04:03:56,054 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1263 transitions. [2023-08-30 04:03:56,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1263 transitions. [2023-08-30 04:03:56,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:03:56,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1263 transitions. [2023-08-30 04:03:56,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.42857142857142) internal successors, (1263), 7 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:56,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:56,062 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:56,062 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 196 flow. Second operand 7 states and 1263 transitions. [2023-08-30 04:03:56,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 175 transitions, 722 flow [2023-08-30 04:03:56,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 175 transitions, 720 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:03:56,066 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 232 flow [2023-08-30 04:03:56,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-30 04:03:56,067 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 8 predicate places. [2023-08-30 04:03:56,068 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 232 flow [2023-08-30 04:03:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.875) internal successors, (1271), 8 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:56,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:56,068 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:03:56,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:03:56,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 04:03:56,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:56,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1454478199, now seen corresponding path program 1 times [2023-08-30 04:03:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:56,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615765815] [2023-08-30 04:03:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:56,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:56,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:03:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:03:56,302 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:03:56,302 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:03:56,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:03:56,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:03:56,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:03:56,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:03:56,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:03:56,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:03:56,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:03:56,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:03:56,304 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:03:56,304 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:03:56,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:03:56,322 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:03:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 528 flow [2023-08-30 04:03:56,441 INFO L130 PetriNetUnfolder]: 140/1013 cut-off events. [2023-08-30 04:03:56,441 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:03:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1013 events. 140/1013 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4992 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 662. Up to 80 conditions per place. [2023-08-30 04:03:56,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 528 flow [2023-08-30 04:03:56,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 528 flow [2023-08-30 04:03:56,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:03:56,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 528 flow [2023-08-30 04:03:56,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 528 flow [2023-08-30 04:03:56,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 528 flow [2023-08-30 04:03:56,553 INFO L130 PetriNetUnfolder]: 140/1013 cut-off events. [2023-08-30 04:03:56,553 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:03:56,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 1013 events. 140/1013 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4992 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 662. Up to 80 conditions per place. [2023-08-30 04:03:56,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 31360 [2023-08-30 04:03:59,348 INFO L134 LiptonReduction]: Checked pairs total: 87836 [2023-08-30 04:03:59,348 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-30 04:03:59,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:03:59,351 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;@6a934382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:03:59,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:03:59,352 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:03:59,352 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:03:59,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:03:59,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:03:59,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:03:59,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:03:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash 58794, now seen corresponding path program 1 times [2023-08-30 04:03:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:03:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749602366] [2023-08-30 04:03:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:03:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:03:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:03:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:03:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:03:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749602366] [2023-08-30 04:03:59,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749602366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:03:59,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:03:59,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:03:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311636826] [2023-08-30 04:03:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:03:59,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:03:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:03:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:03:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:03:59,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 386 [2023-08-30 04:03:59,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:03:59,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:03:59,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 386 [2023-08-30 04:03:59,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand