./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:17:45,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:17:45,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:17:45,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:17:45,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:17:45,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:17:45,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:17:45,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:17:45,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:17:45,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:17:45,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:17:45,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:17:45,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:17:45,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:17:45,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:17:45,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:17:45,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:17:45,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:17:45,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:17:45,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:17:45,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:17:45,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:17:45,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:17:45,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:17:45,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:17:45,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:17:45,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:17:45,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:17:45,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:17:45,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:17:45,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:17:45,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:17:45,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:17:45,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:17:45,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:17:45,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:17:45,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:17:45,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:17:45,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:17:45,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:17:45,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:17:45,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:17:45,795 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:17:45,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:17:45,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:17:45,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:17:45,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:17:45,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:17:45,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:17:45,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:17:45,799 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:17:45,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:17:45,800 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:17:45,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:17:45,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:17:45,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:17:45,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:17:45,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:17:45,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:17:45,801 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:17:45,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:17:45,802 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:17:45,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:17:45,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:17:45,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:17:45,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:17:45,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:17:45,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:17:45,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:17:45,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:17:45,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:17:45,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:17:45,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:17:45,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:17:45,804 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:17:45,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:17:45,805 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:17:45,805 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:17:46,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:17:46,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:17:46,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:17:46,144 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:17:46,144 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:17:46,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-31 00:17:47,263 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:17:47,525 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:17:47,528 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-31 00:17:47,542 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e40b647c/8db49ccf2ff64a9b9a7f2f2a3292c2a7/FLAG5983c3619 [2023-08-31 00:17:47,856 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e40b647c/8db49ccf2ff64a9b9a7f2f2a3292c2a7 [2023-08-31 00:17:47,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:17:47,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:17:47,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:17:47,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:17:47,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:17:47,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:17:47" (1/1) ... [2023-08-31 00:17:47,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab0cf0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:47, skipping insertion in model container [2023-08-31 00:17:47,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:17:47" (1/1) ... [2023-08-31 00:17:47,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:17:47,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:17:48,228 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-08-31 00:17:48,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:17:48,268 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:17:48,307 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_41-trylock_racefree.i[30176,30189] [2023-08-31 00:17:48,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:17:48,387 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:17:48,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48 WrapperNode [2023-08-31 00:17:48,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:17:48,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:17:48,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:17:48,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:17:48,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,447 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-08-31 00:17:48,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:17:48,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:17:48,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:17:48,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:17:48,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:17:48,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:17:48,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:17:48,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:17:48,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (1/1) ... [2023-08-31 00:17:48,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:17:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:17:48,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:17:48,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:17:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:17:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:17:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:17:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:17:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:17:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:17:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:17:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:17:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-31 00:17:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:17:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:17:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:17:48,574 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:17:48,697 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:17:48,698 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:17:48,905 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:17:48,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:17:48,911 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-31 00:17:48,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:17:48 BoogieIcfgContainer [2023-08-31 00:17:48,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:17:48,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:17:48,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:17:48,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:17:48,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:17:47" (1/3) ... [2023-08-31 00:17:48,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a1acd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:17:48, skipping insertion in model container [2023-08-31 00:17:48,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:48" (2/3) ... [2023-08-31 00:17:48,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a1acd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:17:48, skipping insertion in model container [2023-08-31 00:17:48,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:17:48" (3/3) ... [2023-08-31 00:17:48,920 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-31 00:17:48,927 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:17:48,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:17:48,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:17:48,936 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:17:48,994 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:17:49,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-08-31 00:17:49,080 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-08-31 00:17:49,080 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:17:49,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-31 00:17:49,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-08-31 00:17:49,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-08-31 00:17:49,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:49,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-31 00:17:49,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-08-31 00:17:49,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-08-31 00:17:49,165 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-08-31 00:17:49,172 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:49,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-31 00:17:49,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-08-31 00:17:51,565 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-08-31 00:17:51,566 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-31 00:17:51,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:51,584 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6eb74a2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:51,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:51,588 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-31 00:17:51,588 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:51,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:51,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:17:51,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:51,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 383557292, now seen corresponding path program 1 times [2023-08-31 00:17:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:51,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083432873] [2023-08-31 00:17:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:51,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:51,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083432873] [2023-08-31 00:17:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083432873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:17:51,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:17:51,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:17:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444369858] [2023-08-31 00:17:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:17:51,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:17:51,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:17:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:17:51,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-31 00:17:51,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:51,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:51,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-31 00:17:51,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:17:51,972 INFO L130 PetriNetUnfolder]: 89/209 cut-off events. [2023-08-31 00:17:51,972 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:51,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 209 events. 89/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 842 event pairs, 0 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 384. Up to 180 conditions per place. [2023-08-31 00:17:51,978 INFO L137 encePairwiseOnDemand]: 170/181 looper letters, 23 selfloop transitions, 2 changer transitions 5/33 dead transitions. [2023-08-31 00:17:51,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 131 flow [2023-08-31 00:17:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:17:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:17:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-31 00:17:51,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469613259668509 [2023-08-31 00:17:51,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-31 00:17:51,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-31 00:17:52,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:17:52,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-31 00:17:52,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:52,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:52,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:52,017 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 297 transitions. [2023-08-31 00:17:52,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 131 flow [2023-08-31 00:17:52,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:17:52,022 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-31 00:17:52,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-31 00:17:52,026 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-31 00:17:52,027 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-31 00:17:52,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:52,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:52,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:17:52,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:17:52,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:52,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -981753351, now seen corresponding path program 1 times [2023-08-31 00:17:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954026626] [2023-08-31 00:17:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:52,069 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:17:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:52,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:17:52,107 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:17:52,109 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:17:52,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:17:52,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:17:52,111 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:17:52,115 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:17:52,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:17:52,131 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:17:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-31 00:17:52,158 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-08-31 00:17:52,158 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:17:52,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-31 00:17:52,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-08-31 00:17:52,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-08-31 00:17:52,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:52,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-31 00:17:52,162 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-08-31 00:17:52,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-08-31 00:17:52,192 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-08-31 00:17:52,192 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:17:52,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-08-31 00:17:52,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-08-31 00:17:54,205 INFO L134 LiptonReduction]: Checked pairs total: 14688 [2023-08-31 00:17:54,205 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-31 00:17:54,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:54,208 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6eb74a2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:54,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:54,210 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-31 00:17:54,211 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:54,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:54,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:17:54,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:54,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 626726661, now seen corresponding path program 1 times [2023-08-31 00:17:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984404362] [2023-08-31 00:17:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:54,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:54,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:54,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984404362] [2023-08-31 00:17:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984404362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:17:54,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:17:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:17:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264048296] [2023-08-31 00:17:54,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:17:54,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:17:54,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:17:54,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:17:54,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 225 [2023-08-31 00:17:54,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:54,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:54,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 225 [2023-08-31 00:17:54,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:17:54,601 INFO L130 PetriNetUnfolder]: 1665/2829 cut-off events. [2023-08-31 00:17:54,601 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-31 00:17:54,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2829 events. 1665/2829 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15941 event pairs, 1331 based on Foata normal form. 442/2906 useless extension candidates. Maximal degree in co-relation 2459. Up to 2666 conditions per place. [2023-08-31 00:17:54,613 INFO L137 encePairwiseOnDemand]: 208/225 looper letters, 32 selfloop transitions, 2 changer transitions 9/52 dead transitions. [2023-08-31 00:17:54,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 206 flow [2023-08-31 00:17:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:17:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:17:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-31 00:17:54,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644444444444444 [2023-08-31 00:17:54,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-31 00:17:54,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-31 00:17:54,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:17:54,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-31 00:17:54,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:54,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:54,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:54,621 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 381 transitions. [2023-08-31 00:17:54,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 206 flow [2023-08-31 00:17:54,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:17:54,624 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 92 flow [2023-08-31 00:17:54,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-31 00:17:54,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-31 00:17:54,625 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 92 flow [2023-08-31 00:17:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:54,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:54,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:17:54,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:17:54,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:54,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1422392588, now seen corresponding path program 1 times [2023-08-31 00:17:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:54,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306963759] [2023-08-31 00:17:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:54,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306963759] [2023-08-31 00:17:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306963759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:17:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194710360] [2023-08-31 00:17:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:54,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:17:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:17:54,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:17:54,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:17:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:54,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:17:54,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:17:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:54,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:17:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194710360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:17:54,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:17:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:17:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440893769] [2023-08-31 00:17:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:17:54,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:17:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:17:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:17:54,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 225 [2023-08-31 00:17:54,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:54,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:54,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 225 [2023-08-31 00:17:54,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:17:55,043 INFO L130 PetriNetUnfolder]: 331/671 cut-off events. [2023-08-31 00:17:55,043 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-08-31 00:17:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 671 events. 331/671 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3361 event pairs, 50 based on Foata normal form. 80/748 useless extension candidates. Maximal degree in co-relation 1067. Up to 398 conditions per place. [2023-08-31 00:17:55,048 INFO L137 encePairwiseOnDemand]: 222/225 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-31 00:17:55,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 218 flow [2023-08-31 00:17:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 00:17:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 00:17:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 572 transitions. [2023-08-31 00:17:55,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084444444444445 [2023-08-31 00:17:55,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 572 transitions. [2023-08-31 00:17:55,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 572 transitions. [2023-08-31 00:17:55,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:17:55,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 572 transitions. [2023-08-31 00:17:55,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:55,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:55,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:55,056 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 92 flow. Second operand 5 states and 572 transitions. [2023-08-31 00:17:55,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 218 flow [2023-08-31 00:17:55,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:17:55,058 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-31 00:17:55,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-31 00:17:55,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-08-31 00:17:55,060 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-31 00:17:55,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:55,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:55,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:17:55,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:17:55,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:17:55,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:55,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1871727149, now seen corresponding path program 1 times [2023-08-31 00:17:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:55,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103394643] [2023-08-31 00:17:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:55,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:55,293 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:17:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:55,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:17:55,313 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:17:55,313 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:17:55,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:17:55,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:17:55,314 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:17:55,314 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:17:55,314 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:17:55,333 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:17:55,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-08-31 00:17:55,363 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-08-31 00:17:55,364 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:17:55,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-31 00:17:55,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-08-31 00:17:55,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-08-31 00:17:55,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:55,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-08-31 00:17:55,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-08-31 00:17:55,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-08-31 00:17:55,404 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-08-31 00:17:55,404 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:17:55,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-31 00:17:55,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-08-31 00:17:57,634 INFO L134 LiptonReduction]: Checked pairs total: 29489 [2023-08-31 00:17:57,634 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-31 00:17:57,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:57,637 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6eb74a2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:57,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:57,639 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-31 00:17:57,639 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:57,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:57,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:17:57,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:57,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 911945310, now seen corresponding path program 1 times [2023-08-31 00:17:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231588145] [2023-08-31 00:17:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:57,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:57,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231588145] [2023-08-31 00:17:57,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231588145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:17:57,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:17:57,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:17:57,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850292761] [2023-08-31 00:17:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:17:57,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:17:57,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:57,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:17:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:17:57,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 269 [2023-08-31 00:17:57,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:57,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:57,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 269 [2023-08-31 00:17:57,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:18:00,304 INFO L130 PetriNetUnfolder]: 21048/32110 cut-off events. [2023-08-31 00:18:00,305 INFO L131 PetriNetUnfolder]: For 929/929 co-relation queries the response was YES. [2023-08-31 00:18:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 32110 events. 21048/32110 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 227898 event pairs, 12977 based on Foata normal form. 5716/34332 useless extension candidates. Maximal degree in co-relation 6327. Up to 29586 conditions per place. [2023-08-31 00:18:00,467 INFO L137 encePairwiseOnDemand]: 245/269 looper letters, 41 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-08-31 00:18:00,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 266 flow [2023-08-31 00:18:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:18:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:18:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-31 00:18:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749690210656754 [2023-08-31 00:18:00,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-31 00:18:00,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-31 00:18:00,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:18:00,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-31 00:18:00,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:00,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:00,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:00,474 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 464 transitions. [2023-08-31 00:18:00,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 266 flow [2023-08-31 00:18:00,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:18:00,479 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 125 flow [2023-08-31 00:18:00,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-31 00:18:00,482 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-31 00:18:00,483 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 125 flow [2023-08-31 00:18:00,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:00,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:18:00,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:18:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:18:00,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:18:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:18:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1294793156, now seen corresponding path program 1 times [2023-08-31 00:18:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:18:00,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163664111] [2023-08-31 00:18:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:00,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:18:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:18:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:00,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:18:00,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163664111] [2023-08-31 00:18:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163664111] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:18:00,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615518590] [2023-08-31 00:18:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:18:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:18:00,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:18:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:18:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:18:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:18:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:18:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:00,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:18:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:00,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615518590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:18:00,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:18:00,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:18:00,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950764617] [2023-08-31 00:18:00,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:18:00,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:18:00,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:18:00,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:18:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:18:00,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 269 [2023-08-31 00:18:00,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:00,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:18:00,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 269 [2023-08-31 00:18:00,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:18:01,253 INFO L130 PetriNetUnfolder]: 4372/7186 cut-off events. [2023-08-31 00:18:01,253 INFO L131 PetriNetUnfolder]: For 2835/2835 co-relation queries the response was YES. [2023-08-31 00:18:01,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16259 conditions, 7186 events. 4372/7186 cut-off events. For 2835/2835 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 47034 event pairs, 504 based on Foata normal form. 657/7807 useless extension candidates. Maximal degree in co-relation 1849. Up to 4122 conditions per place. [2023-08-31 00:18:01,306 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 75 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-08-31 00:18:01,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 373 flow [2023-08-31 00:18:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:18:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:18:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 844 transitions. [2023-08-31 00:18:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229244114002478 [2023-08-31 00:18:01,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 844 transitions. [2023-08-31 00:18:01,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 844 transitions. [2023-08-31 00:18:01,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:18:01,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 844 transitions. [2023-08-31 00:18:01,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.66666666666666) internal successors, (844), 6 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:01,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:01,316 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:01,316 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 125 flow. Second operand 6 states and 844 transitions. [2023-08-31 00:18:01,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 373 flow [2023-08-31 00:18:01,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 365 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:18:01,322 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-31 00:18:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-31 00:18:01,323 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-08-31 00:18:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-31 00:18:01,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:01,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:18:01,324 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:18:01,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:18:01,531 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,SelfDestructingSolverStorable6 [2023-08-31 00:18:01,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:18:01,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:18:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1520084466, now seen corresponding path program 1 times [2023-08-31 00:18:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:18:01,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286308819] [2023-08-31 00:18:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:01,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:18:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:18:01,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:18:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:18:01,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:18:01,568 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:18:01,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:18:01,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:18:01,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 00:18:01,569 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:18:01,570 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:18:01,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:18:01,597 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:18:01,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-08-31 00:18:01,648 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-08-31 00:18:01,649 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:18:01,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-08-31 00:18:01,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-08-31 00:18:01,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-08-31 00:18:01,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:18:01,658 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-08-31 00:18:01,658 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-08-31 00:18:01,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-08-31 00:18:01,708 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-08-31 00:18:01,709 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:18:01,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-08-31 00:18:01,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-08-31 00:18:03,943 INFO L134 LiptonReduction]: Checked pairs total: 51303 [2023-08-31 00:18:03,943 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-31 00:18:03,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:18:03,946 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6eb74a2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:18:03,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:18:03,948 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-31 00:18:03,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:18:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:18:03,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:18:03,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:18:03,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:18:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1240196070, now seen corresponding path program 1 times [2023-08-31 00:18:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:18:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545546714] [2023-08-31 00:18:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:18:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:18:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:18:03,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545546714] [2023-08-31 00:18:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545546714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:18:03,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:18:03,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:18:03,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179949781] [2023-08-31 00:18:03,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:18:03,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:18:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:18:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:18:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:18:03,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 314 [2023-08-31 00:18:03,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:03,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:18:03,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 314 [2023-08-31 00:18:03,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:18:29,640 INFO L130 PetriNetUnfolder]: 298317/406719 cut-off events. [2023-08-31 00:18:29,640 INFO L131 PetriNetUnfolder]: For 14730/14730 co-relation queries the response was YES. [2023-08-31 00:18:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802382 conditions, 406719 events. 298317/406719 cut-off events. For 14730/14730 co-relation queries the response was YES. Maximal size of possible extension queue 8300. Compared 3051715 event pairs, 214660 based on Foata normal form. 65452/440647 useless extension candidates. Maximal degree in co-relation 69542. Up to 387526 conditions per place. [2023-08-31 00:18:31,658 INFO L137 encePairwiseOnDemand]: 284/314 looper letters, 51 selfloop transitions, 2 changer transitions 11/79 dead transitions. [2023-08-31 00:18:31,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-08-31 00:18:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:18:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:18:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-31 00:18:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806794055201698 [2023-08-31 00:18:31,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-31 00:18:31,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-31 00:18:31,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:18:31,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-31 00:18:31,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:31,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:31,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:31,665 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 238 flow. Second operand 3 states and 547 transitions. [2023-08-31 00:18:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-08-31 00:18:31,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:18:31,672 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 160 flow [2023-08-31 00:18:31,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2023-08-31 00:18:31,673 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-31 00:18:31,673 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 160 flow [2023-08-31 00:18:31,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:31,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:18:31,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:18:31,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:18:31,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:18:31,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:18:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash 692713985, now seen corresponding path program 1 times [2023-08-31 00:18:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:18:31,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7786284] [2023-08-31 00:18:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:31,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:18:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:18:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:18:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7786284] [2023-08-31 00:18:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7786284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:18:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766515359] [2023-08-31 00:18:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:31,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:18:31,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:18:31,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:18:31,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:18:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:18:31,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:18:31,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:18:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:31,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:18:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:31,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766515359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:18:31,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:18:31,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:18:31,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991267172] [2023-08-31 00:18:31,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:18:31,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:18:31,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:18:31,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:18:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:18:31,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 314 [2023-08-31 00:18:31,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 151.42857142857142) internal successors, (1060), 7 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:31,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:18:31,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 314 [2023-08-31 00:18:31,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:18:42,985 INFO L130 PetriNetUnfolder]: 150148/202498 cut-off events. [2023-08-31 00:18:42,986 INFO L131 PetriNetUnfolder]: For 23139/23139 co-relation queries the response was YES. [2023-08-31 00:18:43,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416811 conditions, 202498 events. 150148/202498 cut-off events. For 23139/23139 co-relation queries the response was YES. Maximal size of possible extension queue 4644. Compared 1411740 event pairs, 19242 based on Foata normal form. 729/197386 useless extension candidates. Maximal degree in co-relation 47367. Up to 138268 conditions per place. [2023-08-31 00:18:44,083 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 121 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-08-31 00:18:44,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 142 transitions, 584 flow [2023-08-31 00:18:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:18:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:18:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1024 transitions. [2023-08-31 00:18:44,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435244161358811 [2023-08-31 00:18:44,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1024 transitions. [2023-08-31 00:18:44,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1024 transitions. [2023-08-31 00:18:44,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:18:44,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1024 transitions. [2023-08-31 00:18:44,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.66666666666666) internal successors, (1024), 6 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:44,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:44,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:44,093 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 160 flow. Second operand 6 states and 1024 transitions. [2023-08-31 00:18:44,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 142 transitions, 584 flow [2023-08-31 00:18:44,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 570 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:18:44,110 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 186 flow [2023-08-31 00:18:44,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-31 00:18:44,111 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-31 00:18:44,111 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 186 flow [2023-08-31 00:18:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.42857142857142) internal successors, (1060), 7 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:44,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:18:44,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:18:44,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 00:18:44,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:18:44,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:18:44,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:18:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash 732234382, now seen corresponding path program 1 times [2023-08-31 00:18:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:18:44,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650919709] [2023-08-31 00:18:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:18:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:18:44,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:18:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:18:44,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:18:44,373 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:18:44,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:18:44,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:18:44,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:18:44,374 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:18:44,374 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:18:44,375 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:18:44,399 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 00:18:44,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-08-31 00:18:44,482 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-08-31 00:18:44,482 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:18:44,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-08-31 00:18:44,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 223 transitions, 506 flow [2023-08-31 00:18:44,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 223 transitions, 506 flow [2023-08-31 00:18:44,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:18:44,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 223 transitions, 506 flow [2023-08-31 00:18:44,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 223 transitions, 506 flow [2023-08-31 00:18:44,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-08-31 00:18:44,556 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-08-31 00:18:44,557 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:18:44,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-08-31 00:18:44,584 INFO L119 LiptonReduction]: Number of co-enabled transitions 30520 [2023-08-31 00:18:46,940 INFO L134 LiptonReduction]: Checked pairs total: 84639 [2023-08-31 00:18:46,940 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-31 00:18:46,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:18:46,942 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6eb74a2d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:18:46,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:18:46,944 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-31 00:18:46,944 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:18:46,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:18:46,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 00:18:46,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:18:46,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:18:46,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1611032964, now seen corresponding path program 1 times [2023-08-31 00:18:46,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:18:46,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350191916] [2023-08-31 00:18:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:18:46,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:18:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:18:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:18:46,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:18:46,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350191916] [2023-08-31 00:18:46,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350191916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:18:46,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:18:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:18:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334820700] [2023-08-31 00:18:46,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:18:46,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:18:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:18:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:18:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:18:46,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 359 [2023-08-31 00:18:46,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:18:46,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:18:46,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 359 [2023-08-31 00:18:46,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand