./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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 ../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:53:10,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:53:10,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:53:10,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:53:10,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:53:10,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:53:10,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:53:10,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:53:10,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:53:10,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:53:10,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:53:10,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:53:10,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:53:10,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:53:10,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:53:10,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:53:10,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:53:10,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:53:10,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:53:10,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:53:10,954 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:53:10,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:53:10,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:53:10,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:53:10,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:53:10,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:53:10,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:53:10,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:53:10,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:53:10,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:53:10,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:53:10,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:53:10,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:53:10,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:53:10,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:53:10,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:53:10,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:53:10,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:53:10,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:53:10,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:53:10,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:53:10,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:53:10,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:53:11,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:53:11,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:53:11,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:53:11,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:53:11,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:53:11,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:53:11,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:53:11,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:53:11,014 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:53:11,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:53:11,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:53:11,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:53:11,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:53:11,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:53:11,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:53:11,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:53:11,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:53:11,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:53:11,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:53:11,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:53:11,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:53:11,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:53:11,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:53:11,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:53:11,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:11,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:53:11,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:53:11,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:53:11,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:53:11,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:53:11,019 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:53:11,019 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:53:11,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:53:11,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-07-21 08:53:11,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:53:11,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:53:11,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:53:11,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:53:11,362 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:53:11,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-07-21 08:53:11,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4badf75d/307c249cc3a0448b964c78af175db5f4/FLAGd54230805 [2022-07-21 08:53:11,903 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:53:11,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-07-21 08:53:11,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4badf75d/307c249cc3a0448b964c78af175db5f4/FLAGd54230805 [2022-07-21 08:53:12,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4badf75d/307c249cc3a0448b964c78af175db5f4 [2022-07-21 08:53:12,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:53:12,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:53:12,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:12,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:53:12,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:53:12,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7b006b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12, skipping insertion in model container [2022-07-21 08:53:12,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:53:12,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:53:12,652 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-07-21 08:53:12,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:12,761 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:53:12,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-07-21 08:53:12,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:12,881 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:53:12,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12 WrapperNode [2022-07-21 08:53:12,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:12,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:12,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:53:12,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:53:12,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,928 INFO L137 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 224 [2022-07-21 08:53:12,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:12,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:53:12,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:53:12,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:53:12,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:53:13,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:53:13,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:53:13,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:53:13,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:13,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:13,031 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) [2022-07-21 08:53:13,059 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 [2022-07-21 08:53:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:53:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 08:53:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-07-21 08:53:13,076 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-07-21 08:53:13,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:53:13,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:53:13,077 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-07-21 08:53:13,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-07-21 08:53:13,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:53:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:53:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:53:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:53:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 08:53:13,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:53:13,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:53:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:53:13,080 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:53:13,240 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:53:13,242 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:53:13,603 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:53:13,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:53:13,625 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-21 08:53:13,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:13 BoogieIcfgContainer [2022-07-21 08:53:13,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:53:13,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:53:13,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:53:13,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:53:13,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:53:12" (1/3) ... [2022-07-21 08:53:13,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf2ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:13, skipping insertion in model container [2022-07-21 08:53:13,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (2/3) ... [2022-07-21 08:53:13,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf2ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:13, skipping insertion in model container [2022-07-21 08:53:13,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:13" (3/3) ... [2022-07-21 08:53:13,648 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-07-21 08:53:13,651 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:53:13,658 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:53:13,665 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:53:13,665 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:53:13,764 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:53:13,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 498 flow [2022-07-21 08:53:13,959 INFO L129 PetriNetUnfolder]: 54/440 cut-off events. [2022-07-21 08:53:13,960 INFO L130 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-07-21 08:53:13,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 440 events. 54/440 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1762 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2022-07-21 08:53:13,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 498 flow [2022-07-21 08:53:13,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 236 transitions, 488 flow [2022-07-21 08:53:13,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:13,997 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@703260f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68be8ff1 [2022-07-21 08:53:13,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:53:14,018 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2022-07-21 08:53:14,018 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:14,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,019 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1997877220, now seen corresponding path program 1 times [2022-07-21 08:53:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617496160] [2022-07-21 08:53:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617496160] [2022-07-21 08:53:14,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617496160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:14,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:14,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718993974] [2022-07-21 08:53:14,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:14,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:14,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 238 [2022-07-21 08:53:14,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 236 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 238 [2022-07-21 08:53:14,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,434 INFO L129 PetriNetUnfolder]: 11/402 cut-off events. [2022-07-21 08:53:14,434 INFO L130 PetriNetUnfolder]: For 18/27 co-relation queries the response was YES. [2022-07-21 08:53:14,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 402 events. 11/402 cut-off events. For 18/27 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1466 event pairs, 0 based on Foata normal form. 54/431 useless extension candidates. Maximal degree in co-relation 222. Up to 16 conditions per place. [2022-07-21 08:53:14,438 INFO L132 encePairwiseOnDemand]: 218/238 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-07-21 08:53:14,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 223 transitions, 496 flow [2022-07-21 08:53:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-07-21 08:53:14,458 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9159663865546218 [2022-07-21 08:53:14,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-07-21 08:53:14,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-07-21 08:53:14,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-07-21 08:53:14,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,473 INFO L186 Difference]: Start difference. First operand has 218 places, 236 transitions, 488 flow. Second operand 3 states and 654 transitions. [2022-07-21 08:53:14,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 223 transitions, 496 flow [2022-07-21 08:53:14,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 223 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:14,481 INFO L242 Difference]: Finished difference. Result has 220 places, 219 transitions, 464 flow [2022-07-21 08:53:14,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=220, PETRI_TRANSITIONS=219} [2022-07-21 08:53:14,486 INFO L279 CegarLoopForPetriNet]: 218 programPoint places, 2 predicate places. [2022-07-21 08:53:14,486 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 219 transitions, 464 flow [2022-07-21 08:53:14,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,487 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,487 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:53:14,488 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 1 more)] === [2022-07-21 08:53:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash -787589799, now seen corresponding path program 1 times [2022-07-21 08:53:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430775592] [2022-07-21 08:53:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430775592] [2022-07-21 08:53:14,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430775592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321235539] [2022-07-21 08:53:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:14,590 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) [2022-07-21 08:53:14,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:53:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:14,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321235539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:14,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:14,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128857508] [2022-07-21 08:53:14,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:14,960 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-07-21 08:53:14,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 219 transitions, 464 flow. Second operand has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-07-21 08:53:14,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:15,096 INFO L129 PetriNetUnfolder]: 11/420 cut-off events. [2022-07-21 08:53:15,097 INFO L130 PetriNetUnfolder]: For 19/28 co-relation queries the response was YES. [2022-07-21 08:53:15,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 420 events. 11/420 cut-off events. For 19/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1393 event pairs, 0 based on Foata normal form. 2/398 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2022-07-21 08:53:15,100 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 17 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-07-21 08:53:15,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 231 transitions, 542 flow [2022-07-21 08:53:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1873 transitions. [2022-07-21 08:53:15,105 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8744164332399627 [2022-07-21 08:53:15,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1873 transitions. [2022-07-21 08:53:15,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1873 transitions. [2022-07-21 08:53:15,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:15,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1873 transitions. [2022-07-21 08:53:15,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.11111111111111) internal successors, (1873), 9 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:15,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:15,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:15,118 INFO L186 Difference]: Start difference. First operand has 220 places, 219 transitions, 464 flow. Second operand 9 states and 1873 transitions. [2022-07-21 08:53:15,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 231 transitions, 542 flow [2022-07-21 08:53:15,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 231 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:15,124 INFO L242 Difference]: Finished difference. Result has 230 places, 225 transitions, 512 flow [2022-07-21 08:53:15,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=512, PETRI_PLACES=230, PETRI_TRANSITIONS=225} [2022-07-21 08:53:15,125 INFO L279 CegarLoopForPetriNet]: 218 programPoint places, 12 predicate places. [2022-07-21 08:53:15,125 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 225 transitions, 512 flow [2022-07-21 08:53:15,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:15,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:15,127 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:15,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 08:53:15,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:15,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -113700397, now seen corresponding path program 2 times [2022-07-21 08:53:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:15,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355894086] [2022-07-21 08:53:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355894086] [2022-07-21 08:53:15,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355894086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309930892] [2022-07-21 08:53:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:53:15,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:15,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:15,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:15,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:53:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:53:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:53:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309930892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:15,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:15,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234640123] [2022-07-21 08:53:15,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:15,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:15,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:15,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:15,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-07-21 08:53:15,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 225 transitions, 512 flow. Second operand has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:15,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:15,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-07-21 08:53:15,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:16,201 INFO L129 PetriNetUnfolder]: 11/484 cut-off events. [2022-07-21 08:53:16,201 INFO L130 PetriNetUnfolder]: For 39/48 co-relation queries the response was YES. [2022-07-21 08:53:16,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 484 events. 11/484 cut-off events. For 39/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1396 event pairs, 0 based on Foata normal form. 4/464 useless extension candidates. Maximal degree in co-relation 390. Up to 12 conditions per place. [2022-07-21 08:53:16,205 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 29 selfloop transitions, 21 changer transitions 0/255 dead transitions. [2022-07-21 08:53:16,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 255 transitions, 732 flow [2022-07-21 08:53:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4359 transitions. [2022-07-21 08:53:16,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8721488595438175 [2022-07-21 08:53:16,216 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4359 transitions. [2022-07-21 08:53:16,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4359 transitions. [2022-07-21 08:53:16,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:16,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4359 transitions. [2022-07-21 08:53:16,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 207.57142857142858) internal successors, (4359), 21 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,238 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,239 INFO L186 Difference]: Start difference. First operand has 230 places, 225 transitions, 512 flow. Second operand 21 states and 4359 transitions. [2022-07-21 08:53:16,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 255 transitions, 732 flow [2022-07-21 08:53:16,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 255 transitions, 718 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:16,246 INFO L242 Difference]: Finished difference. Result has 254 places, 238 transitions, 636 flow [2022-07-21 08:53:16,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=636, PETRI_PLACES=254, PETRI_TRANSITIONS=238} [2022-07-21 08:53:16,247 INFO L279 CegarLoopForPetriNet]: 218 programPoint places, 36 predicate places. [2022-07-21 08:53:16,247 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 238 transitions, 636 flow [2022-07-21 08:53:16,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:16,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:16,249 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:16,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:16,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 08:53:16,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -506637625, now seen corresponding path program 3 times [2022-07-21 08:53:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065095222] [2022-07-21 08:53:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:16,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:16,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065095222] [2022-07-21 08:53:16,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065095222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:16,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950835066] [2022-07-21 08:53:16,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:53:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:16,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:16,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process