./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_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 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:40:57,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:40:57,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:40:57,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:40:57,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:40:57,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:40:57,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:40:57,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:40:57,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:40:57,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:40:57,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:40:57,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:40:57,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:40:57,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:40:57,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:40:57,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:40:57,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:40:57,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:40:57,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:40:57,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:40:57,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:40:57,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:40:57,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:40:57,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:40:57,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:40:57,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:40:57,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:40:57,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:40:57,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:40:57,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:40:57,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:40:57,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:40:57,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:40:57,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:40:57,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:40:57,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:40:57,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:40:57,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:40:57,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:40:57,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:40:57,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:40:57,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:40:57,934 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:40:57,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:40:57,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:40:57,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:40:57,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:40:57,937 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:40:57,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:40:57,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:40:57,938 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:40:57,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:40:57,938 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:40:57,939 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:40:57,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:40:57,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:40:57,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:40:57,939 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:40:57,940 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:40:57,940 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:40:57,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:40:57,940 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:40:57,941 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:40:57,941 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:40:57,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:40:57,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:40:57,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:40:57,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:40:57,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:40:57,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:40:57,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:40:57,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:40:57,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:40:57,943 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:40:57,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:40:57,943 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:40:57,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:40:58,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:40:58,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:40:58,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:40:58,276 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:40:58,276 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:40:58,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-29 21:40:59,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:40:59,609 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:40:59,610 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-29 21:40:59,620 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af4eae00/b0a8ad758c254401839ba61196b40bea/FLAGd2142fc7e [2023-08-29 21:40:59,634 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af4eae00/b0a8ad758c254401839ba61196b40bea [2023-08-29 21:40:59,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:40:59,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:40:59,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:40:59,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:40:59,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:40:59,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:40:59" (1/1) ... [2023-08-29 21:40:59,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626a8404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:59, skipping insertion in model container [2023-08-29 21:40:59,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:40:59" (1/1) ... [2023-08-29 21:40:59,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:40:59,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:40:59,898 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_11-ptr_racing.i[30176,30189] [2023-08-29 21:40:59,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:40:59,935 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:40:59,997 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_11-ptr_racing.i[30176,30189] [2023-08-29 21:41:00,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:00,072 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:41:00,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00 WrapperNode [2023-08-29 21:41:00,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:00,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:00,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:41:00,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:41:00,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,136 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-08-29 21:41:00,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:00,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:41:00,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:41:00,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:41:00,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,168 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:41:00,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:41:00,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:41:00,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:41:00,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (1/1) ... [2023-08-29 21:41:00,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:00,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:41:00,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:41:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:41:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:41:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:41:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:41:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:41:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:41:00,236 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:41:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:41:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:41:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:41:00,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:41:00,238 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:41:00,339 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:41:00,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:41:00,628 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:41:00,635 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:41:00,643 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:41:00,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:00 BoogieIcfgContainer [2023-08-29 21:41:00,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:41:00,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:41:00,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:41:00,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:41:00,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:40:59" (1/3) ... [2023-08-29 21:41:00,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f764c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:00, skipping insertion in model container [2023-08-29 21:41:00,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:00" (2/3) ... [2023-08-29 21:41:00,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f764c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:00, skipping insertion in model container [2023-08-29 21:41:00,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:00" (3/3) ... [2023-08-29 21:41:00,652 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-08-29 21:41:00,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:41:00,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-29 21:41:00,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:41:00,773 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:41:00,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:00,864 INFO L130 PetriNetUnfolder]: 17/177 cut-off events. [2023-08-29 21:41:00,864 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:00,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 177 events. 17/177 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 516 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:00,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:00,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:00,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:00,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:00,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:00,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:00,952 INFO L130 PetriNetUnfolder]: 17/177 cut-off events. [2023-08-29 21:41:00,953 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:00,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 177 events. 17/177 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 516 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:00,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 4100 [2023-08-29 21:41:04,502 INFO L134 LiptonReduction]: Checked pairs total: 8685 [2023-08-29 21:41:04,502 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-29 21:41:04,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:04,520 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:04,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-29 21:41:04,523 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:41:04,523 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:04,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:04,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:04,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:04,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:04,529 INFO L85 PathProgramCache]: Analyzing trace with hash 16223, now seen corresponding path program 1 times [2023-08-29 21:41:04,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:04,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850575332] [2023-08-29 21:41:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:04,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:04,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:04,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850575332] [2023-08-29 21:41:04,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850575332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:04,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:04,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021816543] [2023-08-29 21:41:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:04,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:04,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:04,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 250 [2023-08-29 21:41:04,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:04,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:04,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 250 [2023-08-29 21:41:04,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:04,966 INFO L130 PetriNetUnfolder]: 181/458 cut-off events. [2023-08-29 21:41:04,967 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:04,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 458 events. 181/458 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2292 event pairs, 156 based on Foata normal form. 16/325 useless extension candidates. Maximal degree in co-relation 826. Up to 353 conditions per place. [2023-08-29 21:41:04,977 INFO L137 encePairwiseOnDemand]: 235/250 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-08-29 21:41:04,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 192 flow [2023-08-29 21:41:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-29 21:41:04,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2023-08-29 21:41:04,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-29 21:41:04,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-29 21:41:04,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:04,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-29 21:41:05,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,011 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 106 flow. Second operand 3 states and 396 transitions. [2023-08-29 21:41:05,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 192 flow [2023-08-29 21:41:05,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:05,021 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 88 flow [2023-08-29 21:41:05,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-29 21:41:05,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-29 21:41:05,027 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 88 flow [2023-08-29 21:41:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:05,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:41:05,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:05,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash 16222, now seen corresponding path program 1 times [2023-08-29 21:41:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665872462] [2023-08-29 21:41:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665872462] [2023-08-29 21:41:05,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665872462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:05,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:05,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940430615] [2023-08-29 21:41:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:05,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:05,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:05,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:05,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:05,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 250 [2023-08-29 21:41:05,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 88 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) [2023-08-29 21:41:05,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:05,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 250 [2023-08-29 21:41:05,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:05,313 INFO L130 PetriNetUnfolder]: 180/436 cut-off events. [2023-08-29 21:41:05,314 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-29 21:41:05,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 436 events. 180/436 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2159 event pairs, 154 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 836. Up to 382 conditions per place. [2023-08-29 21:41:05,317 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 42 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-29 21:41:05,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 202 flow [2023-08-29 21:41:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-29 21:41:05,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173333333333333 [2023-08-29 21:41:05,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-29 21:41:05,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-29 21:41:05,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:05,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-29 21:41:05,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:05,323 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 88 flow. Second operand 3 states and 388 transitions. [2023-08-29 21:41:05,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 202 flow [2023-08-29 21:41:05,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:05,327 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2023-08-29 21:41:05,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-29 21:41:05,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-29 21:41:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2023-08-29 21:41:05,329 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) [2023-08-29 21:41:05,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:05,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:41:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:41:05,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:05,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash 483600753, now seen corresponding path program 1 times [2023-08-29 21:41:05,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:05,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321929290] [2023-08-29 21:41:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:05,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:05,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:05,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321929290] [2023-08-29 21:41:05,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321929290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67213639] [2023-08-29 21:41:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:05,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:05,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:05,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:41:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:05,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:05,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:41:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:05,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:05,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67213639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:05,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:05,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696826480] [2023-08-29 21:41:05,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:05,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:06,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 250 [2023-08-29 21:41:06,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 111.875) internal successors, (895), 8 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:06,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 250 [2023-08-29 21:41:06,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:06,152 INFO L130 PetriNetUnfolder]: 24/83 cut-off events. [2023-08-29 21:41:06,152 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 21:41:06,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 83 events. 24/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 261 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 155. Up to 50 conditions per place. [2023-08-29 21:41:06,153 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-29 21:41:06,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-29 21:41:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-29 21:41:06,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471 [2023-08-29 21:41:06,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-29 21:41:06,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-29 21:41:06,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:06,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-29 21:41:06,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,160 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,160 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 471 transitions. [2023-08-29 21:41:06,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-29 21:41:06,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:06,161 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 47 flow [2023-08-29 21:41:06,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-29 21:41:06,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2023-08-29 21:41:06,163 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 47 flow [2023-08-29 21:41:06,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.875) internal successors, (895), 8 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:06,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:06,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:06,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:06,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2106686454, now seen corresponding path program 1 times [2023-08-29 21:41:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:06,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674082651] [2023-08-29 21:41:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:06,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:06,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674082651] [2023-08-29 21:41:06,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674082651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:06,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:06,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431782082] [2023-08-29 21:41:06,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:06,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:06,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 250 [2023-08-29 21:41:06,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:06,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 250 [2023-08-29 21:41:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:06,708 INFO L130 PetriNetUnfolder]: 14/56 cut-off events. [2023-08-29 21:41:06,711 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:41:06,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 56 events. 14/56 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 123 event pairs, 0 based on Foata normal form. 3/56 useless extension candidates. Maximal degree in co-relation 97. Up to 35 conditions per place. [2023-08-29 21:41:06,712 INFO L137 encePairwiseOnDemand]: 246/250 looper letters, 11 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-29 21:41:06,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 75 flow [2023-08-29 21:41:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-08-29 21:41:06,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2023-08-29 21:41:06,718 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-08-29 21:41:06,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-08-29 21:41:06,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:06,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-08-29 21:41:06,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,723 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,723 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 47 flow. Second operand 4 states and 455 transitions. [2023-08-29 21:41:06,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 75 flow [2023-08-29 21:41:06,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:06,724 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 44 flow [2023-08-29 21:41:06,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-29 21:41:06,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -19 predicate places. [2023-08-29 21:41:06,726 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 44 flow [2023-08-29 21:41:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:06,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:41:06,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-29 21:41:06,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:06,729 INFO L85 PathProgramCache]: Analyzing trace with hash 882767750, now seen corresponding path program 1 times [2023-08-29 21:41:06,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:06,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120663281] [2023-08-29 21:41:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:06,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120663281] [2023-08-29 21:41:06,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120663281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:06,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:06,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:06,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566889204] [2023-08-29 21:41:06,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:06,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:06,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:06,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:06,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 250 [2023-08-29 21:41:06,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:06,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 250 [2023-08-29 21:41:06,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:06,947 INFO L130 PetriNetUnfolder]: 12/42 cut-off events. [2023-08-29 21:41:06,947 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:41:06,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 42 events. 12/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 3/45 useless extension candidates. Maximal degree in co-relation 80. Up to 30 conditions per place. [2023-08-29 21:41:06,947 INFO L137 encePairwiseOnDemand]: 244/250 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-29 21:41:06,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 65 flow [2023-08-29 21:41:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 416 transitions. [2023-08-29 21:41:06,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416 [2023-08-29 21:41:06,950 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 416 transitions. [2023-08-29 21:41:06,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 416 transitions. [2023-08-29 21:41:06,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:06,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 416 transitions. [2023-08-29 21:41:06,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,955 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,955 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 44 flow. Second operand 4 states and 416 transitions. [2023-08-29 21:41:06,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 65 flow [2023-08-29 21:41:06,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:06,957 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-29 21:41:06,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-29 21:41:06,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -22 predicate places. [2023-08-29 21:41:06,960 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-29 21:41:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:06,963 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 24 remaining) [2023-08-29 21:41:06,966 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2023-08-29 21:41:06,966 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-08-29 21:41:06,966 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-08-29 21:41:06,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-08-29 21:41:06,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-08-29 21:41:06,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-08-29 21:41:06,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2023-08-29 21:41:06,967 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-08-29 21:41:06,968 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-08-29 21:41:06,968 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-08-29 21:41:06,968 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (12 of 24 remaining) [2023-08-29 21:41:06,968 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-08-29 21:41:06,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-08-29 21:41:06,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-08-29 21:41:06,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-08-29 21:41:06,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2023-08-29 21:41:06,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (6 of 24 remaining) [2023-08-29 21:41:06,969 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 24 remaining) [2023-08-29 21:41:06,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2023-08-29 21:41:06,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2023-08-29 21:41:06,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2023-08-29 21:41:06,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2023-08-29 21:41:06,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 24 remaining) [2023-08-29 21:41:06,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:41:06,971 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:41:06,973 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:06,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:06,999 INFO L130 PetriNetUnfolder]: 17/177 cut-off events. [2023-08-29 21:41:06,999 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:07,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 177 events. 17/177 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 516 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:07,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 133 transitions, 274 flow [2023-08-29 21:41:07,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 128 transitions, 261 flow [2023-08-29 21:41:07,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:07,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 128 transitions, 261 flow [2023-08-29 21:41:07,003 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 128 transitions, 261 flow [2023-08-29 21:41:07,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 128 transitions, 261 flow [2023-08-29 21:41:07,023 INFO L130 PetriNetUnfolder]: 16/172 cut-off events. [2023-08-29 21:41:07,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:07,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 172 events. 16/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 497 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-29 21:41:07,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 4100 [2023-08-29 21:41:10,021 INFO L134 LiptonReduction]: Checked pairs total: 8276 [2023-08-29 21:41:10,021 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-08-29 21:41:10,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:10,023 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:10,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:10,027 INFO L130 PetriNetUnfolder]: 2/32 cut-off events. [2023-08-29 21:41:10,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:10,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:10,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:41:10,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:10,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1153159857, now seen corresponding path program 1 times [2023-08-29 21:41:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110060376] [2023-08-29 21:41:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:10,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:10,038 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:10,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:10,057 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:10,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:41:10,058 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:10,059 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:10,059 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:10,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:41:10,078 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:41:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:10,104 INFO L130 PetriNetUnfolder]: 31/293 cut-off events. [2023-08-29 21:41:10,104 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:10,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 293 events. 31/293 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1034 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-08-29 21:41:10,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:10,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:10,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:10,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:10,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:10,136 INFO L130 PetriNetUnfolder]: 31/293 cut-off events. [2023-08-29 21:41:10,136 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:10,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 293 events. 31/293 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1034 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-08-29 21:41:10,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 12464 [2023-08-29 21:41:13,841 INFO L134 LiptonReduction]: Checked pairs total: 34385 [2023-08-29 21:41:13,841 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-29 21:41:13,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:13,843 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:13,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-29 21:41:13,845 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:41:13,845 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:13,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:13,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:13,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:13,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash 31635, now seen corresponding path program 1 times [2023-08-29 21:41:13,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:13,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873776503] [2023-08-29 21:41:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:13,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:13,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873776503] [2023-08-29 21:41:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873776503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:13,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:13,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674311993] [2023-08-29 21:41:13,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:13,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:13,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 326 [2023-08-29 21:41:13,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:13,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:13,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 326 [2023-08-29 21:41:13,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:14,795 INFO L130 PetriNetUnfolder]: 5944/10002 cut-off events. [2023-08-29 21:41:14,795 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-08-29 21:41:14,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19510 conditions, 10002 events. 5944/10002 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 72340 event pairs, 5148 based on Foata normal form. 471/6702 useless extension candidates. Maximal degree in co-relation 11685. Up to 8188 conditions per place. [2023-08-29 21:41:14,844 INFO L137 encePairwiseOnDemand]: 303/326 looper letters, 70 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-29 21:41:14,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 332 flow [2023-08-29 21:41:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-29 21:41:14,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593047034764826 [2023-08-29 21:41:14,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-29 21:41:14,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-29 21:41:14,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:14,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-29 21:41:14,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,851 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 174 flow. Second operand 3 states and 547 transitions. [2023-08-29 21:41:14,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 332 flow [2023-08-29 21:41:14,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:14,855 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 140 flow [2023-08-29 21:41:14,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-29 21:41:14,857 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-08-29 21:41:14,857 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 140 flow [2023-08-29 21:41:14,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:14,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:41:14,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:14,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 31636, now seen corresponding path program 1 times [2023-08-29 21:41:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021501062] [2023-08-29 21:41:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021501062] [2023-08-29 21:41:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021501062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:14,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:14,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561593299] [2023-08-29 21:41:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:14,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 326 [2023-08-29 21:41:14,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:14,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:14,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 326 [2023-08-29 21:41:14,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:15,735 INFO L130 PetriNetUnfolder]: 5943/10031 cut-off events. [2023-08-29 21:41:15,735 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-08-29 21:41:15,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19998 conditions, 10031 events. 5943/10031 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 72515 event pairs, 2808 based on Foata normal form. 0/6477 useless extension candidates. Maximal degree in co-relation 17052. Up to 9394 conditions per place. [2023-08-29 21:41:15,778 INFO L137 encePairwiseOnDemand]: 322/326 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-29 21:41:15,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 294 flow [2023-08-29 21:41:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-29 21:41:15,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224948875255624 [2023-08-29 21:41:15,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-29 21:41:15,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-29 21:41:15,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:15,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-29 21:41:15,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,786 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 140 flow. Second operand 3 states and 511 transitions. [2023-08-29 21:41:15,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 294 flow [2023-08-29 21:41:15,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:15,804 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2023-08-29 21:41:15,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-29 21:41:15,806 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2023-08-29 21:41:15,806 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2023-08-29 21:41:15,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:15,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:15,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:15,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:41:15,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:15,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash -825147249, now seen corresponding path program 1 times [2023-08-29 21:41:15,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:15,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967550002] [2023-08-29 21:41:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967550002] [2023-08-29 21:41:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967550002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:15,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:15,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856767837] [2023-08-29 21:41:15,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:16,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 326 [2023-08-29 21:41:16,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:16,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:16,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 326 [2023-08-29 21:41:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:16,794 INFO L130 PetriNetUnfolder]: 4750/8043 cut-off events. [2023-08-29 21:41:16,794 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2023-08-29 21:41:16,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16224 conditions, 8043 events. 4750/8043 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 55595 event pairs, 2036 based on Foata normal form. 226/5582 useless extension candidates. Maximal degree in co-relation 15545. Up to 6141 conditions per place. [2023-08-29 21:41:16,892 INFO L137 encePairwiseOnDemand]: 319/326 looper letters, 106 selfloop transitions, 7 changer transitions 0/124 dead transitions. [2023-08-29 21:41:16,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 124 transitions, 521 flow [2023-08-29 21:41:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:41:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:41:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2023-08-29 21:41:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504601226993865 [2023-08-29 21:41:16,896 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2023-08-29 21:41:16,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2023-08-29 21:41:16,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:16,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2023-08-29 21:41:16,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:16,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 326.0) internal successors, (2282), 7 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:16,903 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 326.0) internal successors, (2282), 7 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:16,904 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 6 states and 987 transitions. [2023-08-29 21:41:16,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 124 transitions, 521 flow [2023-08-29 21:41:16,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 124 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:16,908 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 160 flow [2023-08-29 21:41:16,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-29 21:41:16,910 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-08-29 21:41:16,910 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 160 flow [2023-08-29 21:41:16,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:16,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:16,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:16,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:41:16,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:16,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash -825395937, now seen corresponding path program 1 times [2023-08-29 21:41:16,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:16,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608815017] [2023-08-29 21:41:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:16,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:16,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608815017] [2023-08-29 21:41:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608815017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:16,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469964834] [2023-08-29 21:41:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:17,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:17,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:41:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:17,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:41:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:17,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469964834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:17,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157471931] [2023-08-29 21:41:17,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:17,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 326 [2023-08-29 21:41:17,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:17,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:17,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 326 [2023-08-29 21:41:17,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:17,628 INFO L130 PetriNetUnfolder]: 796/1571 cut-off events. [2023-08-29 21:41:17,628 INFO L131 PetriNetUnfolder]: For 404/404 co-relation queries the response was YES. [2023-08-29 21:41:17,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3516 conditions, 1571 events. 796/1571 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9850 event pairs, 0 based on Foata normal form. 180/1458 useless extension candidates. Maximal degree in co-relation 3160. Up to 956 conditions per place. [2023-08-29 21:41:17,634 INFO L137 encePairwiseOnDemand]: 322/326 looper letters, 64 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-29 21:41:17,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 314 flow [2023-08-29 21:41:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:41:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:41:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2023-08-29 21:41:17,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883435582822086 [2023-08-29 21:41:17,637 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2023-08-29 21:41:17,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2023-08-29 21:41:17,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:17,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2023-08-29 21:41:17,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:17,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 326.0) internal successors, (1956), 6 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:17,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 326.0) internal successors, (1956), 6 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:17,643 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 160 flow. Second operand 5 states and 796 transitions. [2023-08-29 21:41:17,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 314 flow [2023-08-29 21:41:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 307 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:17,645 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 103 flow [2023-08-29 21:41:17,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-29 21:41:17,646 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 21:41:17,646 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 103 flow [2023-08-29 21:41:17,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:17,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:17,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:17,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-29 21:41:17,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:17,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 190237598, now seen corresponding path program 1 times [2023-08-29 21:41:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:17,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709792237] [2023-08-29 21:41:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:17,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:17,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:17,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709792237] [2023-08-29 21:41:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709792237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:17,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363602586] [2023-08-29 21:41:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:18,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 326 [2023-08-29 21:41:18,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:18,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 326 [2023-08-29 21:41:18,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:18,156 INFO L130 PetriNetUnfolder]: 656/1198 cut-off events. [2023-08-29 21:41:18,156 INFO L131 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2023-08-29 21:41:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1198 events. 656/1198 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6207 event pairs, 446 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 2503. Up to 1035 conditions per place. [2023-08-29 21:41:18,161 INFO L137 encePairwiseOnDemand]: 320/326 looper letters, 37 selfloop transitions, 2 changer transitions 6/53 dead transitions. [2023-08-29 21:41:18,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 232 flow [2023-08-29 21:41:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-29 21:41:18,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532208588957055 [2023-08-29 21:41:18,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-29 21:41:18,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-29 21:41:18,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:18,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-29 21:41:18,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,169 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 103 flow. Second operand 4 states and 591 transitions. [2023-08-29 21:41:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 232 flow [2023-08-29 21:41:18,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 221 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:18,170 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-08-29 21:41:18,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-29 21:41:18,171 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-08-29 21:41:18,171 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-08-29 21:41:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:18,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:18,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:41:18,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:18,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash 337706342, now seen corresponding path program 1 times [2023-08-29 21:41:18,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:18,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478906679] [2023-08-29 21:41:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:41:18,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478906679] [2023-08-29 21:41:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478906679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011503400] [2023-08-29 21:41:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:18,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:41:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:41:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:41:18,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:41:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:41:18,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011503400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:18,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:18,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-29 21:41:18,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878815554] [2023-08-29 21:41:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:18,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:18,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:18,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:18,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 326 [2023-08-29 21:41:18,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:18,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 326 [2023-08-29 21:41:18,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:18,646 INFO L130 PetriNetUnfolder]: 376/777 cut-off events. [2023-08-29 21:41:18,646 INFO L131 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2023-08-29 21:41:18,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 777 events. 376/777 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4136 event pairs, 40 based on Foata normal form. 27/721 useless extension candidates. Maximal degree in co-relation 1287. Up to 552 conditions per place. [2023-08-29 21:41:18,648 INFO L137 encePairwiseOnDemand]: 322/326 looper letters, 30 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-29 21:41:18,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 171 flow [2023-08-29 21:41:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-08-29 21:41:18,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762269938650307 [2023-08-29 21:41:18,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-08-29 21:41:18,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-08-29 21:41:18,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:18,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-08-29 21:41:18,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,660 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 4 states and 621 transitions. [2023-08-29 21:41:18,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 171 flow [2023-08-29 21:41:18,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:18,661 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 83 flow [2023-08-29 21:41:18,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-29 21:41:18,662 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -24 predicate places. [2023-08-29 21:41:18,662 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 83 flow [2023-08-29 21:41:18,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:18,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:18,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:18,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:18,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:18,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-29 21:41:18,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1878960096, now seen corresponding path program 1 times [2023-08-29 21:41:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:18,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715893296] [2023-08-29 21:41:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:41:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:18,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715893296] [2023-08-29 21:41:18,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715893296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:18,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:18,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513661779] [2023-08-29 21:41:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:19,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 326 [2023-08-29 21:41:19,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:19,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:19,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 326 [2023-08-29 21:41:19,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:19,126 INFO L130 PetriNetUnfolder]: 292/585 cut-off events. [2023-08-29 21:41:19,126 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2023-08-29 21:41:19,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 585 events. 292/585 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2845 event pairs, 40 based on Foata normal form. 27/610 useless extension candidates. Maximal degree in co-relation 1003. Up to 414 conditions per place. [2023-08-29 21:41:19,127 INFO L137 encePairwiseOnDemand]: 320/326 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-29 21:41:19,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 159 flow [2023-08-29 21:41:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-08-29 21:41:19,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424846625766871 [2023-08-29 21:41:19,130 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-08-29 21:41:19,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-08-29 21:41:19,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:19,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-08-29 21:41:19,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:19,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:19,134 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 326.0) internal successors, (1630), 5 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:19,134 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 83 flow. Second operand 4 states and 577 transitions. [2023-08-29 21:41:19,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 159 flow [2023-08-29 21:41:19,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:19,135 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-29 21:41:19,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-29 21:41:19,136 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -27 predicate places. [2023-08-29 21:41:19,136 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-29 21:41:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:19,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 32 remaining) [2023-08-29 21:41:19,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2023-08-29 21:41:19,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2023-08-29 21:41:19,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2023-08-29 21:41:19,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2023-08-29 21:41:19,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2023-08-29 21:41:19,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2023-08-29 21:41:19,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2023-08-29 21:41:19,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2023-08-29 21:41:19,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2023-08-29 21:41:19,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 32 remaining) [2023-08-29 21:41:19,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2023-08-29 21:41:19,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2023-08-29 21:41:19,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2023-08-29 21:41:19,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2023-08-29 21:41:19,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 32 remaining) [2023-08-29 21:41:19,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2023-08-29 21:41:19,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2023-08-29 21:41:19,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (1 of 32 remaining) [2023-08-29 21:41:19,142 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2023-08-29 21:41:19,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:41:19,142 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:19,142 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:19,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:19,169 INFO L130 PetriNetUnfolder]: 31/293 cut-off events. [2023-08-29 21:41:19,169 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:19,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 293 events. 31/293 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1034 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-08-29 21:41:19,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:19,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:19,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:19,172 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:19,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:19,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 176 transitions, 370 flow [2023-08-29 21:41:19,195 INFO L130 PetriNetUnfolder]: 31/293 cut-off events. [2023-08-29 21:41:19,196 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:19,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 293 events. 31/293 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1034 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-08-29 21:41:19,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 12464 [2023-08-29 21:41:22,807 INFO L134 LiptonReduction]: Checked pairs total: 31402 [2023-08-29 21:41:22,807 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-29 21:41:22,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:22,811 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:22,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:22,817 INFO L130 PetriNetUnfolder]: 10/80 cut-off events. [2023-08-29 21:41:22,817 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:41:22,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:22,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:41:22,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:22,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash -470476752, now seen corresponding path program 1 times [2023-08-29 21:41:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:22,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809945881] [2023-08-29 21:41:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:22,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:22,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:22,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:22,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:22,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:41:22,858 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:22,859 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:22,859 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:22,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:41:22,887 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:41:22,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:22,936 INFO L130 PetriNetUnfolder]: 50/450 cut-off events. [2023-08-29 21:41:22,937 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:22,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 450 events. 50/450 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 301. Up to 16 conditions per place. [2023-08-29 21:41:22,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:22,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:22,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:22,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:22,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:22,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:22,986 INFO L130 PetriNetUnfolder]: 50/450 cut-off events. [2023-08-29 21:41:22,986 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:22,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 450 events. 50/450 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 301. Up to 16 conditions per place. [2023-08-29 21:41:23,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 24108 [2023-08-29 21:41:26,665 INFO L134 LiptonReduction]: Checked pairs total: 71938 [2023-08-29 21:41:26,665 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-29 21:41:26,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:26,668 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:26,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-29 21:41:26,669 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:41:26,669 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:26,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:26,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:26,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:26,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 50585, now seen corresponding path program 1 times [2023-08-29 21:41:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581857626] [2023-08-29 21:41:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581857626] [2023-08-29 21:41:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581857626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779321726] [2023-08-29 21:41:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:26,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:26,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 397 [2023-08-29 21:41:26,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 240 flow. Second operand has 3 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) [2023-08-29 21:41:26,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:26,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 397 [2023-08-29 21:41:26,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:36,828 INFO L130 PetriNetUnfolder]: 112902/166733 cut-off events. [2023-08-29 21:41:36,828 INFO L131 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2023-08-29 21:41:36,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324644 conditions, 166733 events. 112902/166733 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 5267. Compared 1406474 event pairs, 97500 based on Foata normal form. 9334/117743 useless extension candidates. Maximal degree in co-relation 75083. Up to 135312 conditions per place. [2023-08-29 21:41:37,911 INFO L137 encePairwiseOnDemand]: 366/397 looper letters, 94 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2023-08-29 21:41:37,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 452 flow [2023-08-29 21:41:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-29 21:41:37,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581024349286314 [2023-08-29 21:41:37,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-29 21:41:37,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-29 21:41:37,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:37,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-29 21:41:37,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,919 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 240 flow. Second operand 3 states and 692 transitions. [2023-08-29 21:41:37,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 452 flow [2023-08-29 21:41:37,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 452 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:37,926 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 190 flow [2023-08-29 21:41:37,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-08-29 21:41:37,927 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -6 predicate places. [2023-08-29 21:41:37,928 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 190 flow [2023-08-29 21:41:37,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-29 21:41:37,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:37,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:37,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:41:37,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:37,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash 50584, now seen corresponding path program 1 times [2023-08-29 21:41:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:37,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516722607] [2023-08-29 21:41:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:37,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:37,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:37,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516722607] [2023-08-29 21:41:37,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516722607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:37,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:37,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840329891] [2023-08-29 21:41:37,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:38,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 397 [2023-08-29 21:41:38,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:38,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 397 [2023-08-29 21:41:38,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:47,764 INFO L130 PetriNetUnfolder]: 112901/169300 cut-off events. [2023-08-29 21:41:47,764 INFO L131 PetriNetUnfolder]: For 4698/4698 co-relation queries the response was YES. [2023-08-29 21:41:47,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333144 conditions, 169300 events. 112901/169300 cut-off events. For 4698/4698 co-relation queries the response was YES. Maximal size of possible extension queue 5349. Compared 1448771 event pairs, 73429 based on Foata normal form. 0/113396 useless extension candidates. Maximal degree in co-relation 283659. Up to 156344 conditions per place. [2023-08-29 21:41:48,510 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 73 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-29 21:41:48,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 370 flow [2023-08-29 21:41:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-29 21:41:48,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281276238455079 [2023-08-29 21:41:48,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-29 21:41:48,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-29 21:41:48,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:48,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-29 21:41:48,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:48,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:48,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 397.0) internal successors, (1588), 4 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:48,517 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 190 flow. Second operand 3 states and 629 transitions. [2023-08-29 21:41:48,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 370 flow [2023-08-29 21:41:48,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:48,902 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 198 flow [2023-08-29 21:41:48,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-08-29 21:41:48,903 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -5 predicate places. [2023-08-29 21:41:48,903 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 198 flow [2023-08-29 21:41:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:48,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:48,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:48,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:41:48,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:48,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -485432834, now seen corresponding path program 1 times [2023-08-29 21:41:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:48,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320908954] [2023-08-29 21:41:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:48,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:48,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320908954] [2023-08-29 21:41:48,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320908954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:48,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751402179] [2023-08-29 21:41:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:48,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:48,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:48,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:41:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:49,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 21:41:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:49,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751402179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:49,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029521451] [2023-08-29 21:41:49,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:49,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:49,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 397 [2023-08-29 21:41:49,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 181.875) internal successors, (1455), 8 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:49,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 397 [2023-08-29 21:41:49,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:51,134 INFO L130 PetriNetUnfolder]: 18380/29349 cut-off events. [2023-08-29 21:41:51,135 INFO L131 PetriNetUnfolder]: For 10696/10696 co-relation queries the response was YES. [2023-08-29 21:41:51,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 29349 events. 18380/29349 cut-off events. For 10696/10696 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 231868 event pairs, 1960 based on Foata normal form. 2562/25938 useless extension candidates. Maximal degree in co-relation 6969. Up to 17862 conditions per place. [2023-08-29 21:41:51,405 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 119 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-08-29 21:41:51,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 139 transitions, 555 flow [2023-08-29 21:41:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:41:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:41:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1209 transitions. [2023-08-29 21:41:51,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075566750629723 [2023-08-29 21:41:51,409 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1209 transitions. [2023-08-29 21:41:51,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1209 transitions. [2023-08-29 21:41:51,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:51,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1209 transitions. [2023-08-29 21:41:51,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.5) internal successors, (1209), 6 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 397.0) internal successors, (2779), 7 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,417 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 397.0) internal successors, (2779), 7 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,417 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 198 flow. Second operand 6 states and 1209 transitions. [2023-08-29 21:41:51,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 139 transitions, 555 flow [2023-08-29 21:41:51,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 547 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:51,430 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 153 flow [2023-08-29 21:41:51,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-08-29 21:41:51,430 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -16 predicate places. [2023-08-29 21:41:51,431 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 153 flow [2023-08-29 21:41:51,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.875) internal successors, (1455), 8 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:51,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 21:41:51,636 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,SelfDestructingSolverStorable16 [2023-08-29 21:41:51,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:51,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash -485147436, now seen corresponding path program 1 times [2023-08-29 21:41:51,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:51,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911359591] [2023-08-29 21:41:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:51,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911359591] [2023-08-29 21:41:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911359591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:51,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:51,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821309297] [2023-08-29 21:41:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:51,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:51,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 397 [2023-08-29 21:41:51,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:51,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 397 [2023-08-29 21:41:51,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:53,207 INFO L130 PetriNetUnfolder]: 15676/24642 cut-off events. [2023-08-29 21:41:53,207 INFO L131 PetriNetUnfolder]: For 7088/7088 co-relation queries the response was YES. [2023-08-29 21:41:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51820 conditions, 24642 events. 15676/24642 cut-off events. For 7088/7088 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 194038 event pairs, 804 based on Foata normal form. 549/20626 useless extension candidates. Maximal degree in co-relation 51592. Up to 20911 conditions per place. [2023-08-29 21:41:53,299 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 71 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-29 21:41:53,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 377 flow [2023-08-29 21:41:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2023-08-29 21:41:53,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981108312342569 [2023-08-29 21:41:53,302 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2023-08-29 21:41:53,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2023-08-29 21:41:53,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:53,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2023-08-29 21:41:53,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,307 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,307 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 153 flow. Second operand 4 states and 791 transitions. [2023-08-29 21:41:53,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 377 flow [2023-08-29 21:41:53,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 362 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:53,310 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 144 flow [2023-08-29 21:41:53,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2023-08-29 21:41:53,310 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -18 predicate places. [2023-08-29 21:41:53,311 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 144 flow [2023-08-29 21:41:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:41:53,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:53,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2140299052, now seen corresponding path program 1 times [2023-08-29 21:41:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:53,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331270580] [2023-08-29 21:41:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:53,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331270580] [2023-08-29 21:41:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331270580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:53,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:53,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779087348] [2023-08-29 21:41:53,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:41:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:41:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:41:53,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 397 [2023-08-29 21:41:53,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:53,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 397 [2023-08-29 21:41:53,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:54,495 INFO L130 PetriNetUnfolder]: 12972/19742 cut-off events. [2023-08-29 21:41:54,495 INFO L131 PetriNetUnfolder]: For 2794/2794 co-relation queries the response was YES. [2023-08-29 21:41:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41020 conditions, 19742 events. 12972/19742 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 144041 event pairs, 804 based on Foata normal form. 0/16839 useless extension candidates. Maximal degree in co-relation 40840. Up to 17109 conditions per place. [2023-08-29 21:41:54,573 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-29 21:41:54,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 354 flow [2023-08-29 21:41:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2023-08-29 21:41:54,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4729219143576826 [2023-08-29 21:41:54,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2023-08-29 21:41:54,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2023-08-29 21:41:54,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:54,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2023-08-29 21:41:54,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,580 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 144 flow. Second operand 4 states and 751 transitions. [2023-08-29 21:41:54,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 354 flow [2023-08-29 21:41:54,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:54,582 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 137 flow [2023-08-29 21:41:54,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-29 21:41:54,583 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -21 predicate places. [2023-08-29 21:41:54,583 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 137 flow [2023-08-29 21:41:54,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:54,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:54,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:41:54,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:54,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:54,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1314217138, now seen corresponding path program 1 times [2023-08-29 21:41:54,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:54,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122439937] [2023-08-29 21:41:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:54,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:41:54,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:54,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122439937] [2023-08-29 21:41:54,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122439937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116484562] [2023-08-29 21:41:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:54,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:54,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:54,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 21:41:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:41:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:54,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:41:54,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:41:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:41:54,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:54,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116484562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:54,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:54,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-29 21:41:54,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872740912] [2023-08-29 21:41:54,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:54,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:54,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 397 [2023-08-29 21:41:54,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:54,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 397 [2023-08-29 21:41:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:55,717 INFO L130 PetriNetUnfolder]: 10916/17308 cut-off events. [2023-08-29 21:41:55,718 INFO L131 PetriNetUnfolder]: For 2366/2366 co-relation queries the response was YES. [2023-08-29 21:41:55,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35733 conditions, 17308 events. 10916/17308 cut-off events. For 2366/2366 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 122423 event pairs, 3606 based on Foata normal form. 420/14821 useless extension candidates. Maximal degree in co-relation 31130. Up to 14480 conditions per place. [2023-08-29 21:41:55,784 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 62 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-29 21:41:55,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 323 flow [2023-08-29 21:41:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2023-08-29 21:41:55,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981108312342569 [2023-08-29 21:41:55,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2023-08-29 21:41:55,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2023-08-29 21:41:55,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:55,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2023-08-29 21:41:55,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,790 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,790 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 137 flow. Second operand 4 states and 791 transitions. [2023-08-29 21:41:55,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 323 flow [2023-08-29 21:41:55,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:55,793 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 134 flow [2023-08-29 21:41:55,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-29 21:41:55,793 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -22 predicate places. [2023-08-29 21:41:55,793 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 134 flow [2023-08-29 21:41:55,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:55,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:55,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:55,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:55,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:55,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2086019912, now seen corresponding path program 1 times [2023-08-29 21:41:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:55,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295453413] [2023-08-29 21:41:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:55,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:56,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:56,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295453413] [2023-08-29 21:41:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295453413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:56,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411807406] [2023-08-29 21:41:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:56,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:56,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:56,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:56,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 21:41:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:56,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 21:41:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:56,178 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:41:56,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:41:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 21:41:56,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411807406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:56,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:56,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-29 21:41:56,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914012228] [2023-08-29 21:41:56,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:56,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:56,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:56,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 397 [2023-08-29 21:41:56,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:56,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:56,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 397 [2023-08-29 21:41:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:56,983 INFO L130 PetriNetUnfolder]: 8860/13932 cut-off events. [2023-08-29 21:41:56,984 INFO L131 PetriNetUnfolder]: For 1979/1979 co-relation queries the response was YES. [2023-08-29 21:41:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29373 conditions, 13932 events. 8860/13932 cut-off events. For 1979/1979 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 92693 event pairs, 2946 based on Foata normal form. 420/12825 useless extension candidates. Maximal degree in co-relation 25574. Up to 11584 conditions per place. [2023-08-29 21:41:57,034 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 54 selfloop transitions, 2 changer transitions 6/74 dead transitions. [2023-08-29 21:41:57,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 311 flow [2023-08-29 21:41:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 787 transitions. [2023-08-29 21:41:57,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49559193954659947 [2023-08-29 21:41:57,041 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 787 transitions. [2023-08-29 21:41:57,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 787 transitions. [2023-08-29 21:41:57,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:57,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 787 transitions. [2023-08-29 21:41:57,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,046 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,046 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 134 flow. Second operand 4 states and 787 transitions. [2023-08-29 21:41:57,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 311 flow [2023-08-29 21:41:57,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:57,048 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 121 flow [2023-08-29 21:41:57,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-29 21:41:57,049 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -25 predicate places. [2023-08-29 21:41:57,049 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 121 flow [2023-08-29 21:41:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:57,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:57,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 21:41:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:57,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:57,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash 414177533, now seen corresponding path program 1 times [2023-08-29 21:41:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978944726] [2023-08-29 21:41:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:57,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:41:57,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978944726] [2023-08-29 21:41:57,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978944726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974124665] [2023-08-29 21:41:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:57,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:57,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:57,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 21:41:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:41:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:41:57,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 21:41:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 21:41:57,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974124665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:57,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-29 21:41:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001675306] [2023-08-29 21:41:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:57,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:57,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 397 [2023-08-29 21:41:57,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:57,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 397 [2023-08-29 21:41:57,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:58,127 INFO L130 PetriNetUnfolder]: 5545/9496 cut-off events. [2023-08-29 21:41:58,128 INFO L131 PetriNetUnfolder]: For 1379/1379 co-relation queries the response was YES. [2023-08-29 21:41:58,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19686 conditions, 9496 events. 5545/9496 cut-off events. For 1379/1379 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 67333 event pairs, 904 based on Foata normal form. 0/8669 useless extension candidates. Maximal degree in co-relation 17123. Up to 6531 conditions per place. [2023-08-29 21:41:58,160 INFO L137 encePairwiseOnDemand]: 393/397 looper letters, 49 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-29 21:41:58,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 264 flow [2023-08-29 21:41:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 779 transitions. [2023-08-29 21:41:58,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905541561712846 [2023-08-29 21:41:58,163 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 779 transitions. [2023-08-29 21:41:58,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 779 transitions. [2023-08-29 21:41:58,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:58,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 779 transitions. [2023-08-29 21:41:58,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:58,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:58,167 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:58,167 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 121 flow. Second operand 4 states and 779 transitions. [2023-08-29 21:41:58,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 264 flow [2023-08-29 21:41:58,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:58,170 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 118 flow [2023-08-29 21:41:58,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-29 21:41:58,170 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -29 predicate places. [2023-08-29 21:41:58,171 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 118 flow [2023-08-29 21:41:58,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:58,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:58,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:58,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:58,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-29 21:41:58,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash -45400037, now seen corresponding path program 1 times [2023-08-29 21:41:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:58,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931430669] [2023-08-29 21:41:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 21:41:58,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931430669] [2023-08-29 21:41:58,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931430669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080340424] [2023-08-29 21:41:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:58,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:58,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:58,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:58,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 21:41:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-29 21:41:58,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:58,562 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 21:41:58,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 21:41:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-29 21:41:58,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:41:58,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080340424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:58,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:41:58,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-29 21:41:58,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894520720] [2023-08-29 21:41:58,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:58,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:58,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:58,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 397 [2023-08-29 21:41:58,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:58,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:58,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 397 [2023-08-29 21:41:58,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:59,040 INFO L130 PetriNetUnfolder]: 4219/7090 cut-off events. [2023-08-29 21:41:59,040 INFO L131 PetriNetUnfolder]: For 1181/1181 co-relation queries the response was YES. [2023-08-29 21:41:59,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15276 conditions, 7090 events. 4219/7090 cut-off events. For 1181/1181 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 46894 event pairs, 904 based on Foata normal form. 810/7883 useless extension candidates. Maximal degree in co-relation 13262. Up to 4665 conditions per place. [2023-08-29 21:41:59,052 INFO L137 encePairwiseOnDemand]: 391/397 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-29 21:41:59,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 252 flow [2023-08-29 21:41:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 775 transitions. [2023-08-29 21:41:59,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880352644836272 [2023-08-29 21:41:59,054 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 775 transitions. [2023-08-29 21:41:59,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 775 transitions. [2023-08-29 21:41:59,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:59,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 775 transitions. [2023-08-29 21:41:59,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,058 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 397.0) internal successors, (1985), 5 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,058 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 118 flow. Second operand 4 states and 775 transitions. [2023-08-29 21:41:59,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 252 flow [2023-08-29 21:41:59,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:59,062 INFO L231 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2023-08-29 21:41:59,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=397, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2023-08-29 21:41:59,062 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -32 predicate places. [2023-08-29 21:41:59,062 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2023-08-29 21:41:59,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 40 remaining) [2023-08-29 21:41:59,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2023-08-29 21:41:59,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2023-08-29 21:41:59,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2023-08-29 21:41:59,064 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2023-08-29 21:41:59,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 40 remaining) [2023-08-29 21:41:59,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2023-08-29 21:41:59,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2023-08-29 21:41:59,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2023-08-29 21:41:59,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2023-08-29 21:41:59,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2023-08-29 21:41:59,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2023-08-29 21:41:59,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2023-08-29 21:41:59,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2023-08-29 21:41:59,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2023-08-29 21:41:59,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 40 remaining) [2023-08-29 21:41:59,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 40 remaining) [2023-08-29 21:41:59,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 40 remaining) [2023-08-29 21:41:59,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2023-08-29 21:41:59,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (2 of 40 remaining) [2023-08-29 21:41:59,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2023-08-29 21:41:59,069 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 40 remaining) [2023-08-29 21:41:59,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-29 21:41:59,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-29 21:41:59,274 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:59,275 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:59,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:59,302 INFO L130 PetriNetUnfolder]: 50/450 cut-off events. [2023-08-29 21:41:59,302 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:59,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 450 events. 50/450 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 301. Up to 16 conditions per place. [2023-08-29 21:41:59,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:59,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:59,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:59,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:59,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:59,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 219 transitions, 468 flow [2023-08-29 21:41:59,330 INFO L130 PetriNetUnfolder]: 50/450 cut-off events. [2023-08-29 21:41:59,330 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:59,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 450 events. 50/450 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1779 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 301. Up to 16 conditions per place. [2023-08-29 21:41:59,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 24108 [2023-08-29 21:42:03,233 INFO L134 LiptonReduction]: Checked pairs total: 71279 [2023-08-29 21:42:03,233 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-29 21:42:03,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:03,235 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:03,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:03,243 INFO L130 PetriNetUnfolder]: 19/134 cut-off events. [2023-08-29 21:42:03,243 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:42:03,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:03,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:42:03,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:03,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash -790539743, now seen corresponding path program 1 times [2023-08-29 21:42:03,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:03,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325814483] [2023-08-29 21:42:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:03,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:03,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:03,267 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:03,267 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:03,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:03,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 21:42:03,268 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:03,268 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:03,268 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:03,268 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:42:03,300 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:42:03,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 262 transitions, 568 flow [2023-08-29 21:42:03,386 INFO L130 PetriNetUnfolder]: 81/691 cut-off events. [2023-08-29 21:42:03,387 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:42:03,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 691 events. 81/691 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3111 event pairs, 6 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 470. Up to 32 conditions per place. [2023-08-29 21:42:03,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 262 transitions, 568 flow [2023-08-29 21:42:03,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 262 transitions, 568 flow [2023-08-29 21:42:03,400 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:03,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 262 transitions, 568 flow [2023-08-29 21:42:03,401 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 262 transitions, 568 flow [2023-08-29 21:42:03,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 262 transitions, 568 flow [2023-08-29 21:42:03,479 INFO L130 PetriNetUnfolder]: 81/691 cut-off events. [2023-08-29 21:42:03,479 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:42:03,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 691 events. 81/691 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3111 event pairs, 6 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 470. Up to 32 conditions per place. [2023-08-29 21:42:03,502 INFO L119 LiptonReduction]: Number of co-enabled transitions 39360 [2023-08-29 21:42:07,332 INFO L134 LiptonReduction]: Checked pairs total: 113498 [2023-08-29 21:42:07,332 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-29 21:42:07,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:07,334 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;@2a02d8d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:07,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-29 21:42:07,335 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:42:07,335 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:07,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:07,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:07,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-29 21:42:07,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash 72930, now seen corresponding path program 1 times [2023-08-29 21:42:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775608278] [2023-08-29 21:42:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:07,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775608278] [2023-08-29 21:42:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775608278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:07,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:07,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960901549] [2023-08-29 21:42:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:07,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 477 [2023-08-29 21:42:07,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:07,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:07,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 477 [2023-08-29 21:42:07,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand