./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:58:36,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:58:36,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:58:36,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:58:36,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:58:36,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:58:36,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:58:36,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:58:36,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:58:36,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:58:36,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:58:36,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:58:36,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:58:36,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:58:36,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:58:36,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:58:36,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:58:36,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:58:36,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:58:36,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:58:36,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:58:36,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:58:36,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:58:36,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:58:36,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:58:36,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:58:36,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:58:36,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:58:36,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:58:36,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:58:36,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:58:36,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:58:36,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:58:36,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:58:36,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:58:36,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:58:36,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:58:36,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:58:36,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:58:36,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:58:36,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:58:36,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:58:36,860 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:58:36,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:58:36,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:58:36,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:58:36,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:58:36,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:58:36,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:58:36,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:58:36,863 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:58:36,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:58:36,864 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:58:36,864 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:58:36,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:58:36,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:58:36,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:58:36,865 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:58:36,865 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:58:36,866 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:58:36,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:58:36,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:58:36,866 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:58:36,866 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:58:36,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:58:36,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:58:36,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:58:36,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:58:36,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:58:36,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:58:36,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:58:36,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:58:36,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:58:36,868 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:58:36,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:58:36,869 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:58:36,869 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:58:37,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:58:37,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:58:37,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:58:37,192 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:58:37,192 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:58:37,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-09-01 00:58:38,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:58:38,679 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:58:38,679 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-09-01 00:58:38,699 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065b7b002/fb29d724eb1a41c194e8662c01e6b890/FLAGde20e8f4b [2023-09-01 00:58:38,710 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065b7b002/fb29d724eb1a41c194e8662c01e6b890 [2023-09-01 00:58:38,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:58:38,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:58:38,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:58:38,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:58:38,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:58:38,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:58:38" (1/1) ... [2023-09-01 00:58:38,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a487c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:38, skipping insertion in model container [2023-09-01 00:58:38,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:58:38" (1/1) ... [2023-09-01 00:58:38,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:58:38,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:58:39,247 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_87-lists_racefree.i[47038,47051] [2023-09-01 00:58:39,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:58:39,367 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:58:39,399 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_87-lists_racefree.i[47038,47051] [2023-09-01 00:58:39,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:58:39,500 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:58:39,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39 WrapperNode [2023-09-01 00:58:39,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:58:39,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:58:39,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:58:39,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:58:39,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,574 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 228 [2023-09-01 00:58:39,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:58:39,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:58:39,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:58:39,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:58:39,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,611 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:58:39,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:58:39,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:58:39,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:58:39,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (1/1) ... [2023-09-01 00:58:39,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:58:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:58:39,665 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) [2023-09-01 00:58:39,672 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 [2023-09-01 00:58:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:58:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 00:58:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 00:58:39,698 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 00:58:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:58:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:58:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 00:58:39,699 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 00:58:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:58:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:58:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 00:58:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:58:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 00:58:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:58:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:58:39,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:58:39,702 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:58:39,915 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:58:39,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:58:40,333 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:58:40,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:58:40,347 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 00:58:40,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:58:40 BoogieIcfgContainer [2023-09-01 00:58:40,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:58:40,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:58:40,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:58:40,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:58:40,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:58:38" (1/3) ... [2023-09-01 00:58:40,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35979f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:58:40, skipping insertion in model container [2023-09-01 00:58:40,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:58:39" (2/3) ... [2023-09-01 00:58:40,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35979f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:58:40, skipping insertion in model container [2023-09-01 00:58:40,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:58:40" (3/3) ... [2023-09-01 00:58:40,358 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-09-01 00:58:40,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:58:40,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-09-01 00:58:40,373 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:58:40,526 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:58:40,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 275 transitions, 572 flow [2023-09-01 00:58:40,734 INFO L130 PetriNetUnfolder]: 54/518 cut-off events. [2023-09-01 00:58:40,735 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-09-01 00:58:40,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 518 events. 54/518 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2398 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 262. Up to 8 conditions per place. [2023-09-01 00:58:40,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 275 transitions, 572 flow [2023-09-01 00:58:40,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 265 transitions, 546 flow [2023-09-01 00:58:40,758 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:58:40,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 265 transitions, 546 flow [2023-09-01 00:58:40,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 265 transitions, 546 flow [2023-09-01 00:58:40,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 265 transitions, 546 flow [2023-09-01 00:58:40,847 INFO L130 PetriNetUnfolder]: 50/496 cut-off events. [2023-09-01 00:58:40,847 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-09-01 00:58:40,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 496 events. 50/496 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2244 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-09-01 00:58:40,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 23926 [2023-09-01 00:58:47,534 INFO L134 LiptonReduction]: Checked pairs total: 58038 [2023-09-01 00:58:47,534 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-09-01 00:58:47,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:58:47,551 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11cb5244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:58:47,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 00:58:47,558 INFO L130 PetriNetUnfolder]: 1/43 cut-off events. [2023-09-01 00:58:47,558 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:58:47,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:58:47,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:58:47,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:58:47,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:58:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1857518731, now seen corresponding path program 1 times [2023-09-01 00:58:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:58:47,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32940798] [2023-09-01 00:58:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:58:47,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:58:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:58:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:47,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:58:47,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32940798] [2023-09-01 00:58:47,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32940798] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:58:47,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:58:47,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:58:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822700748] [2023-09-01 00:58:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:58:47,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:58:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:58:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:58:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:58:47,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 485 [2023-09-01 00:58:47,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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) [2023-09-01 00:58:47,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:58:47,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 485 [2023-09-01 00:58:47,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:58:50,332 INFO L130 PetriNetUnfolder]: 16415/28726 cut-off events. [2023-09-01 00:58:50,333 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-09-01 00:58:50,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53988 conditions, 28726 events. 16415/28726 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 232113 event pairs, 15772 based on Foata normal form. 1106/15398 useless extension candidates. Maximal degree in co-relation 51234. Up to 25148 conditions per place. [2023-09-01 00:58:50,412 INFO L137 encePairwiseOnDemand]: 471/485 looper letters, 56 selfloop transitions, 2 changer transitions 16/92 dead transitions. [2023-09-01 00:58:50,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 348 flow [2023-09-01 00:58:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:58:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:58:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2023-09-01 00:58:50,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683848797250859 [2023-09-01 00:58:50,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2023-09-01 00:58:50,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2023-09-01 00:58:50,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:58:50,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2023-09-01 00:58:50,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 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) [2023-09-01 00:58:50,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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) [2023-09-01 00:58:50,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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) [2023-09-01 00:58:50,451 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 220 flow. Second operand 3 states and 827 transitions. [2023-09-01 00:58:50,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 348 flow [2023-09-01 00:58:50,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:58:50,463 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 172 flow [2023-09-01 00:58:50,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2023-09-01 00:58:50,470 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 3 predicate places. [2023-09-01 00:58:50,470 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 172 flow [2023-09-01 00:58:50,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 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) [2023-09-01 00:58:50,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:58:50,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:58:50,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:58:50,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:58:50,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:58:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1186641649, now seen corresponding path program 1 times [2023-09-01 00:58:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:58:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451705344] [2023-09-01 00:58:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:58:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:58:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:58:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:50,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:58:50,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451705344] [2023-09-01 00:58:50,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451705344] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:58:50,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559812878] [2023-09-01 00:58:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:58:50,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:58:50,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:58:50,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:58:50,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:58:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:58:50,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:58:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:58:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:50,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:58:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:50,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559812878] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:58:50,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:58:50,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:58:50,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772863614] [2023-09-01 00:58:50,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:58:50,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:58:50,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:58:50,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:58:50,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:58:50,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 485 [2023-09-01 00:58:50,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 247.57142857142858) internal successors, (1733), 7 states have internal predecessors, (1733), 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) [2023-09-01 00:58:50,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:58:50,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 485 [2023-09-01 00:58:50,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:58:51,775 INFO L130 PetriNetUnfolder]: 5131/9287 cut-off events. [2023-09-01 00:58:51,776 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 00:58:51,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17396 conditions, 9287 events. 5131/9287 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 65283 event pairs, 4938 based on Foata normal form. 0/4612 useless extension candidates. Maximal degree in co-relation 17383. Up to 8044 conditions per place. [2023-09-01 00:58:51,809 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 56 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-09-01 00:58:51,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 306 flow [2023-09-01 00:58:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:58:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:58:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1540 transitions. [2023-09-01 00:58:51,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292096219931272 [2023-09-01 00:58:51,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1540 transitions. [2023-09-01 00:58:51,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1540 transitions. [2023-09-01 00:58:51,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:58:51,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1540 transitions. [2023-09-01 00:58:51,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.6666666666667) internal successors, (1540), 6 states have internal predecessors, (1540), 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) [2023-09-01 00:58:51,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 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) [2023-09-01 00:58:51,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 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) [2023-09-01 00:58:51,825 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 172 flow. Second operand 6 states and 1540 transitions. [2023-09-01 00:58:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 306 flow [2023-09-01 00:58:51,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 302 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:58:51,828 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 204 flow [2023-09-01 00:58:51,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2023-09-01 00:58:51,829 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -4 predicate places. [2023-09-01 00:58:51,829 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 204 flow [2023-09-01 00:58:51,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 247.57142857142858) internal successors, (1733), 7 states have internal predecessors, (1733), 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) [2023-09-01 00:58:51,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:58:51,831 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:58:51,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:58:52,036 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 [2023-09-01 00:58:52,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:58:52,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:58:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -219814389, now seen corresponding path program 2 times [2023-09-01 00:58:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:58:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629889257] [2023-09-01 00:58:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:58:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:58:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:58:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:52,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:58:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629889257] [2023-09-01 00:58:52,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629889257] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:58:52,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450711389] [2023-09-01 00:58:52,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:58:52,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:58:52,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:58:52,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:58:52,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:58:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:58:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:58:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:58:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:58:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:52,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:58:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:52,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450711389] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:58:52,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:58:52,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:58:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28079094] [2023-09-01 00:58:52,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:58:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:58:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:58:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:58:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:58:52,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 485 [2023-09-01 00:58:52,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 204 flow. Second operand has 13 states, 13 states have (on average 247.30769230769232) internal successors, (3215), 13 states have internal predecessors, (3215), 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) [2023-09-01 00:58:52,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:58:52,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 485 [2023-09-01 00:58:52,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:58:53,478 INFO L130 PetriNetUnfolder]: 5131/9293 cut-off events. [2023-09-01 00:58:53,478 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-09-01 00:58:53,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17433 conditions, 9293 events. 5131/9293 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 65250 event pairs, 4938 based on Foata normal form. 6/4625 useless extension candidates. Maximal degree in co-relation 17374. Up to 8044 conditions per place. [2023-09-01 00:58:53,514 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 56 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2023-09-01 00:58:53,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 85 transitions, 374 flow [2023-09-01 00:58:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:58:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:58:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3025 transitions. [2023-09-01 00:58:53,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197594501718213 [2023-09-01 00:58:53,523 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3025 transitions. [2023-09-01 00:58:53,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3025 transitions. [2023-09-01 00:58:53,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:58:53,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3025 transitions. [2023-09-01 00:58:53,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.08333333333334) internal successors, (3025), 12 states have internal predecessors, (3025), 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) [2023-09-01 00:58:53,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 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) [2023-09-01 00:58:53,542 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 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) [2023-09-01 00:58:53,543 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 204 flow. Second operand 12 states and 3025 transitions. [2023-09-01 00:58:53,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 85 transitions, 374 flow [2023-09-01 00:58:53,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 360 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:58:53,546 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 274 flow [2023-09-01 00:58:53,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=274, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2023-09-01 00:58:53,547 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 12 predicate places. [2023-09-01 00:58:53,547 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 274 flow [2023-09-01 00:58:53,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 247.30769230769232) internal successors, (3215), 13 states have internal predecessors, (3215), 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) [2023-09-01 00:58:53,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:58:53,549 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:58:53,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 00:58:53,755 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 [2023-09-01 00:58:53,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:58:53,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:58:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1401807797, now seen corresponding path program 3 times [2023-09-01 00:58:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:58:53,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495384106] [2023-09-01 00:58:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:58:53,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:58:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:58:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:58:54,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:58:54,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495384106] [2023-09-01 00:58:54,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495384106] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:58:54,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502181594] [2023-09-01 00:58:54,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 00:58:54,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:58:54,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:58:54,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:58:54,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 01:00:26,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 01:00:26,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:00:26,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 01:00:26,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:00:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:26,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:00:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:26,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502181594] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:00:26,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:00:26,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 01:00:26,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158924762] [2023-09-01 01:00:26,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:00:26,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 01:00:26,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:00:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 01:00:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 01:00:27,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 485 [2023-09-01 01:00:27,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 274 flow. Second operand has 25 states, 25 states have (on average 247.16) internal successors, (6179), 25 states have internal predecessors, (6179), 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) [2023-09-01 01:00:27,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:00:27,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 485 [2023-09-01 01:00:27,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:00:28,092 INFO L130 PetriNetUnfolder]: 5131/9305 cut-off events. [2023-09-01 01:00:28,093 INFO L131 PetriNetUnfolder]: For 476/476 co-relation queries the response was YES. [2023-09-01 01:00:28,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17517 conditions, 9305 events. 5131/9305 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 65244 event pairs, 4938 based on Foata normal form. 12/4643 useless extension candidates. Maximal degree in co-relation 17380. Up to 8044 conditions per place. [2023-09-01 01:00:28,128 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 56 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2023-09-01 01:00:28,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 97 transitions, 528 flow [2023-09-01 01:00:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 01:00:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 01:00:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5995 transitions. [2023-09-01 01:00:28,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150343642611683 [2023-09-01 01:00:28,145 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5995 transitions. [2023-09-01 01:00:28,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5995 transitions. [2023-09-01 01:00:28,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:00:28,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5995 transitions. [2023-09-01 01:00:28,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 249.79166666666666) internal successors, (5995), 24 states have internal predecessors, (5995), 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) [2023-09-01 01:00:28,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 485.0) internal successors, (12125), 25 states have internal predecessors, (12125), 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) [2023-09-01 01:00:28,180 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 485.0) internal successors, (12125), 25 states have internal predecessors, (12125), 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) [2023-09-01 01:00:28,180 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 274 flow. Second operand 24 states and 5995 transitions. [2023-09-01 01:00:28,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 97 transitions, 528 flow [2023-09-01 01:00:28,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 97 transitions, 456 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-09-01 01:00:28,185 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 394 flow [2023-09-01 01:00:28,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=394, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2023-09-01 01:00:28,186 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 42 predicate places. [2023-09-01 01:00:28,186 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 394 flow [2023-09-01 01:00:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 247.16) internal successors, (6179), 25 states have internal predecessors, (6179), 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) [2023-09-01 01:00:28,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:00:28,189 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-09-01 01:00:28,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:00:28,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:28,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 01:00:28,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:00:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash -491161397, now seen corresponding path program 4 times [2023-09-01 01:00:28,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:00:28,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349817526] [2023-09-01 01:00:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:00:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:00:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:00:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:29,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:00:29,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349817526] [2023-09-01 01:00:29,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349817526] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:00:29,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7359085] [2023-09-01 01:00:29,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 01:00:29,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:29,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:00:29,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:00:29,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 01:00:30,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 01:00:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:00:30,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 01:00:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:00:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:30,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:00:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:30,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7359085] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:00:30,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:00:30,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 01:00:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702198082] [2023-09-01 01:00:30,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:00:30,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 01:00:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:00:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 01:00:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 01:00:31,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 485 [2023-09-01 01:00:31,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 394 flow. Second operand has 49 states, 49 states have (on average 247.08163265306123) internal successors, (12107), 49 states have internal predecessors, (12107), 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) [2023-09-01 01:00:31,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:00:31,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 485 [2023-09-01 01:00:31,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:00:32,535 INFO L130 PetriNetUnfolder]: 5131/9329 cut-off events. [2023-09-01 01:00:32,535 INFO L131 PetriNetUnfolder]: For 5246/5246 co-relation queries the response was YES. [2023-09-01 01:00:32,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17661 conditions, 9329 events. 5131/9329 cut-off events. For 5246/5246 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 65198 event pairs, 4938 based on Foata normal form. 24/4679 useless extension candidates. Maximal degree in co-relation 17392. Up to 8044 conditions per place. [2023-09-01 01:00:32,571 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 56 selfloop transitions, 47 changer transitions 0/121 dead transitions. [2023-09-01 01:00:32,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 121 transitions, 792 flow [2023-09-01 01:00:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 01:00:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 01:00:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11935 transitions. [2023-09-01 01:00:32,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126718213058419 [2023-09-01 01:00:32,595 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11935 transitions. [2023-09-01 01:00:32,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11935 transitions. [2023-09-01 01:00:32,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:00:32,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11935 transitions. [2023-09-01 01:00:32,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 248.64583333333334) internal successors, (11935), 48 states have internal predecessors, (11935), 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) [2023-09-01 01:00:32,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 485.0) internal successors, (23765), 49 states have internal predecessors, (23765), 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) [2023-09-01 01:00:32,652 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 485.0) internal successors, (23765), 49 states have internal predecessors, (23765), 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) [2023-09-01 01:00:32,652 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 394 flow. Second operand 48 states and 11935 transitions. [2023-09-01 01:00:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 121 transitions, 792 flow [2023-09-01 01:00:32,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 121 transitions, 648 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-09-01 01:00:32,659 INFO L231 Difference]: Finished difference. Result has 193 places, 121 transitions, 634 flow [2023-09-01 01:00:32,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=634, PETRI_PLACES=193, PETRI_TRANSITIONS=121} [2023-09-01 01:00:32,660 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 102 predicate places. [2023-09-01 01:00:32,660 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 121 transitions, 634 flow [2023-09-01 01:00:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 247.08163265306123) internal successors, (12107), 49 states have internal predecessors, (12107), 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) [2023-09-01 01:00:32,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:00:32,663 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-09-01 01:00:32,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 01:00:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:32,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 01:00:32,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:00:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1131672011, now seen corresponding path program 5 times [2023-09-01 01:00:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:00:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641277388] [2023-09-01 01:00:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:00:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:00:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:00:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 01:00:36,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:00:36,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641277388] [2023-09-01 01:00:36,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641277388] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:00:36,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170003205] [2023-09-01 01:00:36,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 01:00:36,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:00:36,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:00:36,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:00:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15