./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --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 [2023-08-31 00:30:12,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:30:12,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:30:12,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:30:12,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:30:12,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:30:12,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:30:12,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:30:12,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:30:12,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:30:12,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:30:12,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:30:12,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:30:12,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:30:12,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:30:12,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:30:12,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:30:12,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:30:12,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:30:12,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:30:12,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:30:12,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:30:12,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:30:12,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:30:12,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:30:12,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:30:12,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:30:12,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:30:12,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:30:12,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:30:12,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:30:12,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:30:12,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:30:12,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:30:12,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:30:12,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:30:12,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:30:12,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:30:12,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:30:12,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:30:12,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:30:12,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:30:12,872 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:30:12,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:30:12,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:30:12,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:30:12,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:30:12,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:30:12,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:30:12,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:30:12,878 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:30:12,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:30:12,879 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:30:12,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:30:12,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:30:12,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:30:12,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:30:12,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:30:12,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:30:12,880 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:30:12,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:30:12,880 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:30:12,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:30:12,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:30:12,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:30:12,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:30:12,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:30:12,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:30:12,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:30:12,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:30:12,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:30:12,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:30:12,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:30:12,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:30:12,882 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:30:12,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:30:12,882 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:30:12,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:30:13,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:30:13,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:30:13,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:30:13,145 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:30:13,145 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:30:13,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-31 00:30:14,112 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:30:14,333 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:30:14,334 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-31 00:30:14,347 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e4fc7acf/f08fbc570132424bbff3390f12b73820/FLAGe4cd6ba83 [2023-08-31 00:30:14,357 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e4fc7acf/f08fbc570132424bbff3390f12b73820 [2023-08-31 00:30:14,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:30:14,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:30:14,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:30:14,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:30:14,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:30:14,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:14,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ea7f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14, skipping insertion in model container [2023-08-31 00:30:14,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:14,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:30:14,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:30:14,807 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_82-list_racefree.i[47038,47051] [2023-08-31 00:30:14,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:30:14,858 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:30:14,886 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_82-list_racefree.i[47038,47051] [2023-08-31 00:30:14,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:30:14,972 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:30:14,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14 WrapperNode [2023-08-31 00:30:14,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:30:14,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:30:14,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:30:14,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:30:14,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,035 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-08-31 00:30:15,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:30:15,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:30:15,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:30:15,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:30:15,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:30:15,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:30:15,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:30:15,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:30:15,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (1/1) ... [2023-08-31 00:30:15,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:30:15,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:30:15,125 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) [2023-08-31 00:30:15,144 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 [2023-08-31 00:30:15,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:30:15,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-31 00:30:15,149 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-31 00:30:15,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-31 00:30:15,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-31 00:30:15,150 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-31 00:30:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:30:15,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:30:15,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:30:15,152 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:30:15,275 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:30:15,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:30:15,490 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:30:15,496 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:30:15,496 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-31 00:30:15,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:30:15 BoogieIcfgContainer [2023-08-31 00:30:15,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:30:15,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:30:15,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:30:15,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:30:15,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:30:14" (1/3) ... [2023-08-31 00:30:15,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65187421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:30:15, skipping insertion in model container [2023-08-31 00:30:15,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:30:14" (2/3) ... [2023-08-31 00:30:15,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65187421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:30:15, skipping insertion in model container [2023-08-31 00:30:15,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:30:15" (3/3) ... [2023-08-31 00:30:15,503 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-08-31 00:30:15,509 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:30:15,515 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:30:15,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:30:15,515 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:30:15,684 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:30:15,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-08-31 00:30:15,859 INFO L130 PetriNetUnfolder]: 52/402 cut-off events. [2023-08-31 00:30:15,859 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-31 00:30:15,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-31 00:30:15,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-08-31 00:30:15,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 208 transitions, 432 flow [2023-08-31 00:30:15,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:30:15,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-31 00:30:15,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-31 00:30:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 208 transitions, 432 flow [2023-08-31 00:30:15,939 INFO L130 PetriNetUnfolder]: 48/390 cut-off events. [2023-08-31 00:30:15,939 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-08-31 00:30:15,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 390 events. 48/390 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-08-31 00:30:15,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 12936 [2023-08-31 00:30:21,349 INFO L134 LiptonReduction]: Checked pairs total: 23205 [2023-08-31 00:30:21,349 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-31 00:30:21,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:30:21,372 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@74c7a74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:30:21,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 00:30:21,377 INFO L130 PetriNetUnfolder]: 0/19 cut-off events. [2023-08-31 00:30:21,377 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:30:21,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:30:21,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:30:21,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 00:30:21,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:30:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1373220507, now seen corresponding path program 1 times [2023-08-31 00:30:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:30:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371513689] [2023-08-31 00:30:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:30:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:30:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:30:21,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:30:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:30:21,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:30:21,599 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:30:21,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-31 00:30:21,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-31 00:30:21,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-31 00:30:21,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-31 00:30:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:30:21,603 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 00:30:21,605 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:30:21,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:30:21,680 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-31 00:30:21,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-31 00:30:21,852 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-08-31 00:30:21,853 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-31 00:30:21,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-31 00:30:21,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-31 00:30:21,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 327 transitions, 702 flow [2023-08-31 00:30:21,869 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:30:21,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-31 00:30:21,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-31 00:30:21,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-31 00:30:22,027 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-08-31 00:30:22,027 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-31 00:30:22,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7367 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-31 00:30:22,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 53524 [2023-08-31 00:30:27,858 INFO L134 LiptonReduction]: Checked pairs total: 118633 [2023-08-31 00:30:27,858 INFO L136 LiptonReduction]: Total number of compositions: 248 [2023-08-31 00:30:27,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:30:27,866 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@74c7a74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:30:27,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:30:27,875 INFO L130 PetriNetUnfolder]: 9/80 cut-off events. [2023-08-31 00:30:27,875 INFO L131 PetriNetUnfolder]: For 5/6 co-relation queries the response was YES. [2023-08-31 00:30:27,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:30:27,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:30:27,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:30:27,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:30:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1284027515, now seen corresponding path program 1 times [2023-08-31 00:30:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:30:27,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013936038] [2023-08-31 00:30:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:30:27,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:30:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:30:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:30:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:30:28,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013936038] [2023-08-31 00:30:28,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013936038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:30:28,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:30:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:30:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341733596] [2023-08-31 00:30:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:30:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:30:28,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:30:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:30:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:30:28,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 575 [2023-08-31 00:30:28,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:30:28,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:30:28,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 575 [2023-08-31 00:30:28,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:31:40,010 INFO L130 PetriNetUnfolder]: 823691/1098759 cut-off events. [2023-08-31 00:31:40,011 INFO L131 PetriNetUnfolder]: For 46844/46844 co-relation queries the response was YES. [2023-08-31 00:31:42,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158676 conditions, 1098759 events. 823691/1098759 cut-off events. For 46844/46844 co-relation queries the response was YES. Maximal size of possible extension queue 22115. Compared 8430499 event pairs, 576024 based on Foata normal form. 74880/1019906 useless extension candidates. Maximal degree in co-relation 342012. Up to 1038244 conditions per place. [2023-08-31 00:31:45,220 INFO L137 encePairwiseOnDemand]: 550/575 looper letters, 82 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-31 00:31:45,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 101 transitions, 418 flow [2023-08-31 00:31:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:31:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:31:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-31 00:31:45,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-08-31 00:31:45,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-31 00:31:45,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-31 00:31:45,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:31:45,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-31 00:31:45,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:45,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:45,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:45,272 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 276 flow. Second operand 3 states and 950 transitions. [2023-08-31 00:31:45,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 101 transitions, 418 flow [2023-08-31 00:31:45,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:31:45,313 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 244 flow [2023-08-31 00:31:45,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2023-08-31 00:31:45,317 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2023-08-31 00:31:45,318 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 244 flow [2023-08-31 00:31:45,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:45,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:31:45,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:31:45,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:31:45,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:31:45,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:31:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 503193650, now seen corresponding path program 1 times [2023-08-31 00:31:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:31:45,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315033698] [2023-08-31 00:31:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:31:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:31:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:31:45,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:31:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:31:45,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:31:45,384 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:31:45,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:31:45,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:31:45,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-31 00:31:45,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:31:45,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:31:45,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:31:45,386 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:31:45,386 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:31:45,386 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:31:45,430 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-31 00:31:45,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 444 transitions, 966 flow [2023-08-31 00:31:45,950 INFO L130 PetriNetUnfolder]: 664/3318 cut-off events. [2023-08-31 00:31:45,950 INFO L131 PetriNetUnfolder]: For 419/494 co-relation queries the response was YES. [2023-08-31 00:31:46,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 3318 events. 664/3318 cut-off events. For 419/494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 25435 event pairs, 32 based on Foata normal form. 0/2817 useless extension candidates. Maximal degree in co-relation 2178. Up to 192 conditions per place. [2023-08-31 00:31:46,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 444 transitions, 966 flow [2023-08-31 00:31:46,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 396 places, 444 transitions, 966 flow [2023-08-31 00:31:46,057 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:31:46,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 396 places, 444 transitions, 966 flow [2023-08-31 00:31:46,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 396 places, 444 transitions, 966 flow [2023-08-31 00:31:46,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 444 transitions, 966 flow [2023-08-31 00:31:46,633 INFO L130 PetriNetUnfolder]: 664/3318 cut-off events. [2023-08-31 00:31:46,633 INFO L131 PetriNetUnfolder]: For 419/494 co-relation queries the response was YES. [2023-08-31 00:31:46,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 3318 events. 664/3318 cut-off events. For 419/494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 25435 event pairs, 32 based on Foata normal form. 0/2817 useless extension candidates. Maximal degree in co-relation 2178. Up to 192 conditions per place. [2023-08-31 00:31:46,829 INFO L119 LiptonReduction]: Number of co-enabled transitions 120384 [2023-08-31 00:31:53,665 INFO L134 LiptonReduction]: Checked pairs total: 270596 [2023-08-31 00:31:53,665 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-31 00:31:53,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:31:53,667 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@74c7a74d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:31:53,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:31:53,672 INFO L130 PetriNetUnfolder]: 11/81 cut-off events. [2023-08-31 00:31:53,672 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2023-08-31 00:31:53,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:31:53,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:31:53,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:31:53,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:31:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1246506739, now seen corresponding path program 1 times [2023-08-31 00:31:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:31:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367625775] [2023-08-31 00:31:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:31:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:31:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:31:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:31:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:31:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367625775] [2023-08-31 00:31:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367625775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:31:53,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:31:53,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:31:53,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243811009] [2023-08-31 00:31:53,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:31:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:31:53,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:31:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:31:53,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:31:53,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 775 [2023-08-31 00:31:53,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 161 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:53,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:31:53,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 775 [2023-08-31 00:31:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand