./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.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_81-list_racing.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 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b --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 00:29:47,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:29:47,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:29:47,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:29:47,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:29:47,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:29:47,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:29:47,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:29:47,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:29:47,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:29:47,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:29:47,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:29:47,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:29:47,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:29:47,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:29:47,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:29:47,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:29:47,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:29:47,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:29:47,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:29:47,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:29:47,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:29:47,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:29:47,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:29:47,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:29:47,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:29:47,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:29:47,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:29:47,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:29:47,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:29:47,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:29:47,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:29:47,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:29:47,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:29:47,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:29:47,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:29:47,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:29:47,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:29:47,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:29:47,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:29:47,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:29:47,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:29:47,509 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:29:47,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:29:47,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:29:47,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:29:47,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:29:47,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:29:47,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:29:47,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:29:47,512 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:29:47,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:29:47,512 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:29:47,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:29:47,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:29:47,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:29:47,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:29:47,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:29:47,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:29:47,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:29:47,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:29:47,515 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:29:47,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:29:47,516 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:29:47,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:29:47,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:29:47,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:29:47,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:29:47,750 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:29:47,750 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:29:47,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-31 00:29:48,663 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:29:48,897 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:29:48,898 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-31 00:29:48,915 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46681781b/e11e5c0fd7d44d1393e5dc167f478532/FLAG788ebc59c [2023-08-31 00:29:48,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46681781b/e11e5c0fd7d44d1393e5dc167f478532 [2023-08-31 00:29:48,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:29:48,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:29:48,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:29:48,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:29:48,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:29:48,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:29:48" (1/1) ... [2023-08-31 00:29:48,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75dd5be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:48, skipping insertion in model container [2023-08-31 00:29:48,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:29:48" (1/1) ... [2023-08-31 00:29:48,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:29:48,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:29:49,210 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_81-list_racing.i[47038,47051] [2023-08-31 00:29:49,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:29:49,252 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:29:49,283 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_81-list_racing.i[47038,47051] [2023-08-31 00:29:49,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:29:49,356 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:29:49,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49 WrapperNode [2023-08-31 00:29:49,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:29:49,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:29:49,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:29:49,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:29:49,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,419 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-08-31 00:29:49,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:29:49,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:29:49,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:29:49,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:29:49,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:29:49,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:29:49,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:29:49,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:29:49,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (1/1) ... [2023-08-31 00:29:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:29:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:29:49,496 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 00:29:49,514 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 00:29:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:29:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-31 00:29:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-31 00:29:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-31 00:29:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:29:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-31 00:29:49,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:29:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:29:49,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:29:49,527 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 00:29:49,659 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:29:49,661 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:29:49,907 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:29:49,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:29:49,916 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-31 00:29:49,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:29:49 BoogieIcfgContainer [2023-08-31 00:29:49,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:29:49,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:29:49,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:29:49,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:29:49,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:29:48" (1/3) ... [2023-08-31 00:29:49,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e771755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:29:49, skipping insertion in model container [2023-08-31 00:29:49,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:29:49" (2/3) ... [2023-08-31 00:29:49,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e771755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:29:49, skipping insertion in model container [2023-08-31 00:29:49,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:29:49" (3/3) ... [2023-08-31 00:29:49,943 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2023-08-31 00:29:49,948 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:29:49,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:29:49,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:29:49,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:29:50,099 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:29:50,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-08-31 00:29:50,274 INFO L130 PetriNetUnfolder]: 52/398 cut-off events. [2023-08-31 00:29:50,274 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-31 00:29:50,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-08-31 00:29:50,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-08-31 00:29:50,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 430 flow [2023-08-31 00:29:50,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:29:50,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-31 00:29:50,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-31 00:29:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 430 flow [2023-08-31 00:29:50,359 INFO L130 PetriNetUnfolder]: 48/386 cut-off events. [2023-08-31 00:29:50,359 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-08-31 00:29:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 386 events. 48/386 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1533 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-31 00:29:50,367 INFO L119 LiptonReduction]: Number of co-enabled transitions 12564 [2023-08-31 00:29:55,031 INFO L134 LiptonReduction]: Checked pairs total: 21299 [2023-08-31 00:29:55,032 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-31 00:29:55,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:29:55,062 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;@73385ebd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:29:55,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 00:29:55,066 INFO L130 PetriNetUnfolder]: 0/19 cut-off events. [2023-08-31 00:29:55,066 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:29:55,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:29:55,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:29:55,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 00:29:55,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:29:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1532212723, now seen corresponding path program 1 times [2023-08-31 00:29:55,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:29:55,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426757051] [2023-08-31 00:29:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:29:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:29:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:29:55,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:29:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:29:55,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:29:55,257 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:29:55,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-31 00:29:55,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-31 00:29:55,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-31 00:29:55,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-31 00:29:55,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:29:55,261 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 00:29:55,263 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:29:55,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:29:55,314 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-31 00:29:55,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-31 00:29:55,467 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-08-31 00:29:55,467 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-31 00:29:55,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-31 00:29:55,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-08-31 00:29:55,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 323 transitions, 694 flow [2023-08-31 00:29:55,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:29:55,484 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-31 00:29:55,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-31 00:29:55,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-31 00:29:55,631 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-08-31 00:29:55,632 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-31 00:29:55,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-31 00:29:55,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 51412 [2023-08-31 00:30:01,615 INFO L134 LiptonReduction]: Checked pairs total: 101735 [2023-08-31 00:30:01,615 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-31 00:30:01,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:30:01,618 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;@73385ebd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:30:01,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:30:01,623 INFO L130 PetriNetUnfolder]: 5/63 cut-off events. [2023-08-31 00:30:01,624 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 00:30:01,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:30:01,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:30:01,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:30:01,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:30:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1874496575, now seen corresponding path program 1 times [2023-08-31 00:30:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:30:01,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325817849] [2023-08-31 00:30:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:30:01,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:30:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:30:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:30:01,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:30:01,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325817849] [2023-08-31 00:30:01,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325817849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:30:01,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:30:01,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:30:01,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714833303] [2023-08-31 00:30:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:30:01,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:30:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:30:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:30:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:30:01,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 572 [2023-08-31 00:30:01,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:30:01,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:30:01,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 572 [2023-08-31 00:30:01,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:31:05,585 INFO L130 PetriNetUnfolder]: 783305/1048357 cut-off events. [2023-08-31 00:31:05,585 INFO L131 PetriNetUnfolder]: For 44920/44920 co-relation queries the response was YES. [2023-08-31 00:31:07,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056556 conditions, 1048357 events. 783305/1048357 cut-off events. For 44920/44920 co-relation queries the response was YES. Maximal size of possible extension queue 21058. Compared 8018875 event pairs, 546616 based on Foata normal form. 84048/984751 useless extension candidates. Maximal degree in co-relation 324969. Up to 987090 conditions per place. [2023-08-31 00:31:10,397 INFO L137 encePairwiseOnDemand]: 547/572 looper letters, 81 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-31 00:31:10,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 412 flow [2023-08-31 00:31:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:31:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:31:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-08-31 00:31:10,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546037296037296 [2023-08-31 00:31:10,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-08-31 00:31:10,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-08-31 00:31:10,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:31:10,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-08-31 00:31:10,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:10,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:10,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:10,426 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 272 flow. Second operand 3 states and 937 transitions. [2023-08-31 00:31:10,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 412 flow [2023-08-31 00:31:10,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 99 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:31:10,442 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 240 flow [2023-08-31 00:31:10,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2023-08-31 00:31:10,447 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-31 00:31:10,447 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 240 flow [2023-08-31 00:31:10,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:10,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:31:10,448 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:31:10,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:31:10,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:31:10,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:31:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash -792283344, now seen corresponding path program 1 times [2023-08-31 00:31:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:31:10,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528039658] [2023-08-31 00:31:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:31:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:31:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:31:10,498 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:31:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:31:10,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:31:10,526 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:31:10,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:31:10,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:31:10,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-31 00:31:10,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:31:10,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:31:10,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:31:10,528 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:31:10,528 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:31:10,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:31:10,569 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-31 00:31:10,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 437 transitions, 952 flow [2023-08-31 00:31:11,132 INFO L130 PetriNetUnfolder]: 664/3284 cut-off events. [2023-08-31 00:31:11,132 INFO L131 PetriNetUnfolder]: For 419/462 co-relation queries the response was YES. [2023-08-31 00:31:11,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 3284 events. 664/3284 cut-off events. For 419/462 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 24950 event pairs, 64 based on Foata normal form. 0/2791 useless extension candidates. Maximal degree in co-relation 2153. Up to 192 conditions per place. [2023-08-31 00:31:11,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 437 transitions, 952 flow [2023-08-31 00:31:11,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 437 transitions, 952 flow [2023-08-31 00:31:11,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:31:11,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 389 places, 437 transitions, 952 flow [2023-08-31 00:31:11,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 389 places, 437 transitions, 952 flow [2023-08-31 00:31:11,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 437 transitions, 952 flow [2023-08-31 00:31:11,646 INFO L130 PetriNetUnfolder]: 664/3284 cut-off events. [2023-08-31 00:31:11,646 INFO L131 PetriNetUnfolder]: For 419/462 co-relation queries the response was YES. [2023-08-31 00:31:11,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 3284 events. 664/3284 cut-off events. For 419/462 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 24950 event pairs, 64 based on Foata normal form. 0/2791 useless extension candidates. Maximal degree in co-relation 2153. Up to 192 conditions per place. [2023-08-31 00:31:11,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 115164 [2023-08-31 00:31:18,869 INFO L134 LiptonReduction]: Checked pairs total: 234918 [2023-08-31 00:31:18,870 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-31 00:31:18,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:31:18,872 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;@73385ebd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:31:18,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:31:18,876 INFO L130 PetriNetUnfolder]: 5/54 cut-off events. [2023-08-31 00:31:18,876 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 00:31:18,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:31:18,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:31:18,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:31:18,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:31:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 335112668, now seen corresponding path program 1 times [2023-08-31 00:31:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:31:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865816143] [2023-08-31 00:31:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:31:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:31:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:31:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:31:18,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:31:18,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865816143] [2023-08-31 00:31:18,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865816143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:31:18,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:31:18,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:31:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017052703] [2023-08-31 00:31:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:31:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:31:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:31:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:31:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:31:18,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 768 [2023-08-31 00:31:18,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:31:18,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:31:18,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 768 [2023-08-31 00:31:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand