./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50de8acec85b0b2508f1f33521d9ab6717fa1b5141d6b9e2d08fcb4af894112b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:02:14,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:02:14,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:02:14,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:02:14,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:02:14,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:02:14,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:02:14,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:02:14,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:02:14,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:02:14,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:02:14,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:02:14,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:02:14,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:02:14,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:02:14,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:02:14,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:02:14,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:02:14,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:02:14,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:02:14,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:02:14,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:02:14,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:02:14,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:02:14,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:02:14,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:02:14,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:02:14,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:02:14,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:02:14,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:02:14,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:02:14,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:02:14,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:02:14,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:02:15,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:02:15,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:02:15,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:02:15,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:02:15,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:02:15,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:02:15,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:02:15,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:02:15,043 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:02:15,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:02:15,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:02:15,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:02:15,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:02:15,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:02:15,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:02:15,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:02:15,047 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:02:15,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:02:15,048 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:02:15,048 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:02:15,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:02:15,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:02:15,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:02:15,049 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:02:15,049 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:02:15,049 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:02:15,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:02:15,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:02:15,050 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:02:15,050 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:02:15,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:02:15,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:02:15,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:02:15,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:15,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:02:15,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:02:15,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:02:15,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:02:15,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:02:15,052 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:02:15,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:02:15,052 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:02:15,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50de8acec85b0b2508f1f33521d9ab6717fa1b5141d6b9e2d08fcb4af894112b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:02:15,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:02:15,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:02:15,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:02:15,357 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:02:15,358 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:02:15,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-08-30 04:02:16,480 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:02:16,724 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:02:16,729 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-08-30 04:02:16,752 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97bf8624/48f915715a8c4a50a7b8ecf9dbf2b860/FLAG590592e2e [2023-08-30 04:02:16,766 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97bf8624/48f915715a8c4a50a7b8ecf9dbf2b860 [2023-08-30 04:02:16,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:02:16,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:02:16,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:16,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:02:16,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:02:16,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:16" (1/1) ... [2023-08-30 04:02:16,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a7e36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:16, skipping insertion in model container [2023-08-30 04:02:16,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:16" (1/1) ... [2023-08-30 04:02:16,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:02:16,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:02:17,132 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_04-munge_racefree.i[30176,30189] [2023-08-30 04:02:17,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:17,179 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:02:17,228 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_04-munge_racefree.i[30176,30189] [2023-08-30 04:02:17,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:17,323 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:02:17,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17 WrapperNode [2023-08-30 04:02:17,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:17,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:17,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:02:17,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:02:17,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,379 INFO L138 Inliner]: procedures = 172, calls = 37, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 202 [2023-08-30 04:02:17,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:17,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:02:17,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:02:17,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:02:17,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:02:17,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:02:17,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:02:17,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:02:17,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (1/1) ... [2023-08-30 04:02:17,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:17,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:02:17,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:02:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:02:17,486 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 04:02:17,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 04:02:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:02:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:02:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:02:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:02:17,487 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 04:02:17,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 04:02:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:02:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:02:17,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:02:17,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:02:17,490 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:02:17,677 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:02:17,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:02:17,973 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:02:17,981 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:02:17,985 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-30 04:02:17,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:17 BoogieIcfgContainer [2023-08-30 04:02:17,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:02:17,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:02:17,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:02:17,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:02:17,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:02:16" (1/3) ... [2023-08-30 04:02:17,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511a4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:17, skipping insertion in model container [2023-08-30 04:02:17,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:17" (2/3) ... [2023-08-30 04:02:17,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511a4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:17, skipping insertion in model container [2023-08-30 04:02:17,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:17" (3/3) ... [2023-08-30 04:02:17,997 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_04-munge_racefree.i [2023-08-30 04:02:18,012 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:02:18,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-30 04:02:18,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:02:18,135 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:02:18,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 212 transitions, 446 flow [2023-08-30 04:02:18,327 INFO L130 PetriNetUnfolder]: 58/399 cut-off events. [2023-08-30 04:02:18,327 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 04:02:18,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 399 events. 58/399 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1791 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-30 04:02:18,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 212 transitions, 446 flow [2023-08-30 04:02:18,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 212 transitions, 446 flow [2023-08-30 04:02:18,357 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:18,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 212 transitions, 446 flow [2023-08-30 04:02:18,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 212 transitions, 446 flow [2023-08-30 04:02:18,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 212 transitions, 446 flow [2023-08-30 04:02:18,435 INFO L130 PetriNetUnfolder]: 58/399 cut-off events. [2023-08-30 04:02:18,435 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 04:02:18,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 399 events. 58/399 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1791 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-30 04:02:18,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 18036 [2023-08-30 04:02:22,360 INFO L134 LiptonReduction]: Checked pairs total: 35591 [2023-08-30 04:02:22,360 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-30 04:02:22,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:22,376 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;@19bc6aa0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:22,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-30 04:02:22,378 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:02:22,379 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:22,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:22,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:22,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:22,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 27138, now seen corresponding path program 1 times [2023-08-30 04:02:22,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:22,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923340195] [2023-08-30 04:02:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:22,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:22,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923340195] [2023-08-30 04:02:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923340195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:22,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:22,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414207245] [2023-08-30 04:02:22,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:22,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:22,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 372 [2023-08-30 04:02:22,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 91 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:22,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:22,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 372 [2023-08-30 04:02:22,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:23,724 INFO L130 PetriNetUnfolder]: 5533/9583 cut-off events. [2023-08-30 04:02:23,725 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2023-08-30 04:02:23,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18210 conditions, 9583 events. 5533/9583 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 71784 event pairs, 2522 based on Foata normal form. 1545/8150 useless extension candidates. Maximal degree in co-relation 17394. Up to 8496 conditions per place. [2023-08-30 04:02:23,804 INFO L137 encePairwiseOnDemand]: 347/372 looper letters, 65 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 04:02:23,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 322 flow [2023-08-30 04:02:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-30 04:02:23,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-30 04:02:23,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-30 04:02:23,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-30 04:02:23,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:23,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-30 04:02:23,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:23,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:23,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:23,846 INFO L175 Difference]: Start difference. First operand has 69 places, 91 transitions, 204 flow. Second operand 3 states and 620 transitions. [2023-08-30 04:02:23,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 322 flow [2023-08-30 04:02:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:23,856 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 170 flow [2023-08-30 04:02:23,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-08-30 04:02:23,861 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2023-08-30 04:02:23,861 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 170 flow [2023-08-30 04:02:23,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:23,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:23,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:23,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:02:23,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:23,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash 27137, now seen corresponding path program 1 times [2023-08-30 04:02:23,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:23,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613820166] [2023-08-30 04:02:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:23,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613820166] [2023-08-30 04:02:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613820166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:23,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:23,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:23,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7502578] [2023-08-30 04:02:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:23,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:23,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:23,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:23,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:23,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 372 [2023-08-30 04:02:23,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:23,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:23,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 372 [2023-08-30 04:02:23,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:24,691 INFO L130 PetriNetUnfolder]: 5325/9142 cut-off events. [2023-08-30 04:02:24,691 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-08-30 04:02:24,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17379 conditions, 9142 events. 5325/9142 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 66563 event pairs, 4184 based on Foata normal form. 0/6333 useless extension candidates. Maximal degree in co-relation 17281. Up to 6915 conditions per place. [2023-08-30 04:02:24,746 INFO L137 encePairwiseOnDemand]: 367/372 looper letters, 73 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-30 04:02:24,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 368 flow [2023-08-30 04:02:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-08-30 04:02:24,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241935483870968 [2023-08-30 04:02:24,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-08-30 04:02:24,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-08-30 04:02:24,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:24,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-08-30 04:02:24,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:24,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:24,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:24,754 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 170 flow. Second operand 3 states and 585 transitions. [2023-08-30 04:02:24,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 368 flow [2023-08-30 04:02:24,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:24,758 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 168 flow [2023-08-30 04:02:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2023-08-30 04:02:24,759 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-08-30 04:02:24,759 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 168 flow [2023-08-30 04:02:24,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:24,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:24,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:02:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:02:24,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:24,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash 809151194, now seen corresponding path program 1 times [2023-08-30 04:02:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:24,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560828777] [2023-08-30 04:02:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:24,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:24,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560828777] [2023-08-30 04:02:24,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560828777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:24,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643800712] [2023-08-30 04:02:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:24,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:24,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:02:24,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:02:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:24,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:25,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:02:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:25,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:25,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643800712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:25,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:25,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:02:25,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126709745] [2023-08-30 04:02:25,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:25,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:02:25,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:02:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:02:25,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 372 [2023-08-30 04:02:25,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 169.875) internal successors, (1359), 8 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:25,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:25,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 372 [2023-08-30 04:02:25,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:25,384 INFO L130 PetriNetUnfolder]: 25/85 cut-off events. [2023-08-30 04:02:25,385 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:25,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 85 events. 25/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 289 event pairs, 0 based on Foata normal form. 13/91 useless extension candidates. Maximal degree in co-relation 179. Up to 50 conditions per place. [2023-08-30 04:02:25,386 INFO L137 encePairwiseOnDemand]: 368/372 looper letters, 27 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 04:02:25,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 141 flow [2023-08-30 04:02:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:02:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:02:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 703 transitions. [2023-08-30 04:02:25,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724462365591398 [2023-08-30 04:02:25,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 703 transitions. [2023-08-30 04:02:25,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 703 transitions. [2023-08-30 04:02:25,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:25,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 703 transitions. [2023-08-30 04:02:25,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:25,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:25,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:25,395 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 168 flow. Second operand 4 states and 703 transitions. [2023-08-30 04:02:25,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 141 flow [2023-08-30 04:02:25,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:25,396 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 58 flow [2023-08-30 04:02:25,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-30 04:02:25,397 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -38 predicate places. [2023-08-30 04:02:25,397 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 58 flow [2023-08-30 04:02:25,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.875) internal successors, (1359), 8 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:25,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:25,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:02:25,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:02:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:25,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:25,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash -686116079, now seen corresponding path program 1 times [2023-08-30 04:02:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:25,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775839648] [2023-08-30 04:02:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:25,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:25,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:25,651 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:25,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2023-08-30 04:02:25,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2023-08-30 04:02:25,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-30 04:02:25,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-30 04:02:25,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-30 04:02:25,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-30 04:02:25,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-08-30 04:02:25,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-30 04:02:25,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-30 04:02:25,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-30 04:02:25,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2023-08-30 04:02:25,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2023-08-30 04:02:25,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2023-08-30 04:02:25,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2023-08-30 04:02:25,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-08-30 04:02:25,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:02:25,666 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:02:25,668 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:25,668 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:02:25,724 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 04:02:25,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 326 transitions, 700 flow [2023-08-30 04:02:25,924 INFO L130 PetriNetUnfolder]: 197/1183 cut-off events. [2023-08-30 04:02:25,925 INFO L131 PetriNetUnfolder]: For 72/75 co-relation queries the response was YES. [2023-08-30 04:02:25,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 1183 events. 197/1183 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7207 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 722. Up to 32 conditions per place. [2023-08-30 04:02:25,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 275 places, 326 transitions, 700 flow [2023-08-30 04:02:25,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 275 places, 326 transitions, 700 flow [2023-08-30 04:02:25,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:25,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 275 places, 326 transitions, 700 flow [2023-08-30 04:02:25,958 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 275 places, 326 transitions, 700 flow [2023-08-30 04:02:25,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 326 transitions, 700 flow [2023-08-30 04:02:26,145 INFO L130 PetriNetUnfolder]: 197/1183 cut-off events. [2023-08-30 04:02:26,145 INFO L131 PetriNetUnfolder]: For 72/75 co-relation queries the response was YES. [2023-08-30 04:02:26,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 1183 events. 197/1183 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7207 event pairs, 1 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 722. Up to 32 conditions per place. [2023-08-30 04:02:26,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 61560 [2023-08-30 04:02:30,455 INFO L134 LiptonReduction]: Checked pairs total: 148137 [2023-08-30 04:02:30,455 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-30 04:02:30,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:30,458 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;@19bc6aa0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:30,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-30 04:02:30,460 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:02:30,461 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:30,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:30,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:30,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 04:02:30,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 48222, now seen corresponding path program 1 times [2023-08-30 04:02:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:30,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347725278] [2023-08-30 04:02:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347725278] [2023-08-30 04:02:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347725278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118332517] [2023-08-30 04:02:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:30,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:30,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:30,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 547 [2023-08-30 04:02:30,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 161 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:02:30,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:30,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 547 [2023-08-30 04:02:30,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand