./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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_86-lists_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 db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:16:34,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:16:34,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:16:34,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:16:34,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:16:34,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:16:34,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:16:34,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:16:34,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:16:34,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:16:34,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:16:34,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:16:34,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:16:34,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:16:34,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:16:34,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:16:34,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:16:34,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:16:34,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:16:34,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:16:34,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:16:34,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:16:34,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:16:34,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:16:34,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:16:34,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:16:34,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:16:34,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:16:34,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:16:34,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:16:34,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:16:34,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:16:34,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:16:34,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:16:34,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:16:34,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:16:34,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:16:34,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:16:34,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:16:34,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:16:34,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:16:34,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:16:34,456 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:16:34,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:16:34,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:16:34,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:16:34,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:16:34,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:16:34,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:16:34,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:16:34,458 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:16:34,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:16:34,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:16:34,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:16:34,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:16:34,461 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:16:34,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:16:34,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:16:34,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:16:34,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:16:34,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:16:34,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:16:34,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:16:34,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:16:34,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:16:34,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:16:34,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:16:34,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:16:34,463 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:16:34,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:16:34,463 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:16:34,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:16:34,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:16:34,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:16:34,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:16:34,735 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:16:34,735 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:16:34,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-09-01 11:16:35,635 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:16:35,869 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:16:35,869 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-09-01 11:16:35,892 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/544170991/c3ca946fd6d54d5b88b2039611376d90/FLAG842e7d219 [2023-09-01 11:16:35,905 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/544170991/c3ca946fd6d54d5b88b2039611376d90 [2023-09-01 11:16:35,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:16:35,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:16:35,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:16:35,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:16:35,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:16:35,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:16:35" (1/1) ... [2023-09-01 11:16:35,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590fba4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:35, skipping insertion in model container [2023-09-01 11:16:35,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:16:35" (1/1) ... [2023-09-01 11:16:35,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:16:35,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:16:36,261 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_86-lists_racing.i[47038,47051] [2023-09-01 11:16:36,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:16:36,403 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:16:36,431 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_86-lists_racing.i[47038,47051] [2023-09-01 11:16:36,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:16:36,489 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:16:36,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36 WrapperNode [2023-09-01 11:16:36,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:16:36,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:16:36,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:16:36,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:16:36,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,549 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 232 [2023-09-01 11:16:36,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:16:36,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:16:36,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:16:36,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:16:36,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,572 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:16:36,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:16:36,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:16:36,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:16:36,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (1/1) ... [2023-09-01 11:16:36,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:16:36,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:16:36,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 11:16:36,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 11:16:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:16:36,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 11:16:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 11:16:36,658 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 11:16:36,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:16:36,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:16:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 11:16:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 11:16:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:16:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:16:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:16:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:16:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 11:16:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:16:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:16:36,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:16:36,662 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:16:36,820 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:16:36,822 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:16:37,144 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:16:37,150 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:16:37,150 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 11:16:37,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:16:37 BoogieIcfgContainer [2023-09-01 11:16:37,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:16:37,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:16:37,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:16:37,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:16:37,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:16:35" (1/3) ... [2023-09-01 11:16:37,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530c36e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:16:37, skipping insertion in model container [2023-09-01 11:16:37,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:16:36" (2/3) ... [2023-09-01 11:16:37,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530c36e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:16:37, skipping insertion in model container [2023-09-01 11:16:37,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:16:37" (3/3) ... [2023-09-01 11:16:37,158 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-09-01 11:16:37,163 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:16:37,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:16:37,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:16:37,169 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:16:37,256 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:16:37,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 488 flow [2023-09-01 11:16:37,396 INFO L130 PetriNetUnfolder]: 54/435 cut-off events. [2023-09-01 11:16:37,396 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-09-01 11:16:37,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 435 events. 54/435 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1721 event pairs, 0 based on Foata normal form. 0/371 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-09-01 11:16:37,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 233 transitions, 488 flow [2023-09-01 11:16:37,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 231 transitions, 478 flow [2023-09-01 11:16:37,420 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:16:37,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 231 transitions, 478 flow [2023-09-01 11:16:37,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 231 transitions, 478 flow [2023-09-01 11:16:37,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 231 transitions, 478 flow [2023-09-01 11:16:37,474 INFO L130 PetriNetUnfolder]: 50/423 cut-off events. [2023-09-01 11:16:37,475 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-09-01 11:16:37,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 423 events. 50/423 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1639 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-09-01 11:16:37,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 15880 [2023-09-01 11:16:41,929 INFO L134 LiptonReduction]: Checked pairs total: 24331 [2023-09-01 11:16:41,929 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 11:16:41,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:16:41,943 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;@773925ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:16:41,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 11:16:41,948 INFO L130 PetriNetUnfolder]: 1/27 cut-off events. [2023-09-01 11:16:41,948 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:16:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:16:41,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:16:41,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:16:41,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:16:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash -438899358, now seen corresponding path program 1 times [2023-09-01 11:16:41,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:16:41,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806774805] [2023-09-01 11:16:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:16:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:16:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:16:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:42,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:16:42,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806774805] [2023-09-01 11:16:42,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806774805] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:16:42,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:16:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:16:42,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253554424] [2023-09-01 11:16:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:16:42,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:16:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:16:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:16:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:16:42,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 417 [2023-09-01 11:16:42,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 65 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:42,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:16:42,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 417 [2023-09-01 11:16:42,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:16:42,652 INFO L130 PetriNetUnfolder]: 3305/5516 cut-off events. [2023-09-01 11:16:42,653 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2023-09-01 11:16:42,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10754 conditions, 5516 events. 3305/5516 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 30891 event pairs, 3078 based on Foata normal form. 276/4857 useless extension candidates. Maximal degree in co-relation 9713. Up to 5166 conditions per place. [2023-09-01 11:16:42,664 INFO L137 encePairwiseOnDemand]: 403/417 looper letters, 38 selfloop transitions, 2 changer transitions 9/55 dead transitions. [2023-09-01 11:16:42,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 224 flow [2023-09-01 11:16:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:16:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:16:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-09-01 11:16:42,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403677058353318 [2023-09-01 11:16:42,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-09-01 11:16:42,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-09-01 11:16:42,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:16:42,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-09-01 11:16:42,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:42,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:42,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 417.0) internal successors, (1668), 4 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:42,687 INFO L175 Difference]: Start difference. First operand has 54 places, 65 transitions, 146 flow. Second operand 3 states and 676 transitions. [2023-09-01 11:16:42,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 224 flow [2023-09-01 11:16:42,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:16:42,694 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 112 flow [2023-09-01 11:16:42,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-09-01 11:16:42,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-09-01 11:16:42,697 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 112 flow [2023-09-01 11:16:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:42,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:16:42,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:16:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:16:42,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:16:42,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:16:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1830623665, now seen corresponding path program 1 times [2023-09-01 11:16:42,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:16:42,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529924395] [2023-09-01 11:16:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:16:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:16:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:16:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:42,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:16:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529924395] [2023-09-01 11:16:42,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529924395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:16:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115782623] [2023-09-01 11:16:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:16:42,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:16:42,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:16:42,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:16:42,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:16:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:16:42,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:16:42,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:16:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:42,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:16:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:42,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115782623] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:16:42,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:16:42,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:16:42,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387906716] [2023-09-01 11:16:42,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:16:42,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:16:42,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:16:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:16:42,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:16:42,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 417 [2023-09-01 11:16:42,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 112 flow. Second operand has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:42,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:16:42,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 417 [2023-09-01 11:16:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:16:43,192 INFO L130 PetriNetUnfolder]: 1331/2313 cut-off events. [2023-09-01 11:16:43,192 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 11:16:43,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4508 conditions, 2313 events. 1331/2313 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11273 event pairs, 1250 based on Foata normal form. 0/1964 useless extension candidates. Maximal degree in co-relation 4495. Up to 2152 conditions per place. [2023-09-01 11:16:43,199 INFO L137 encePairwiseOnDemand]: 414/417 looper letters, 38 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-09-01 11:16:43,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 210 flow [2023-09-01 11:16:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:16:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:16:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1270 transitions. [2023-09-01 11:16:43,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075939248601119 [2023-09-01 11:16:43,202 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1270 transitions. [2023-09-01 11:16:43,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1270 transitions. [2023-09-01 11:16:43,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:16:43,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1270 transitions. [2023-09-01 11:16:43,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:43,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:43,210 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 417.0) internal successors, (2919), 7 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:43,210 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 112 flow. Second operand 6 states and 1270 transitions. [2023-09-01 11:16:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 210 flow [2023-09-01 11:16:43,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 206 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:16:43,212 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 144 flow [2023-09-01 11:16:43,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-09-01 11:16:43,213 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-09-01 11:16:43,213 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 144 flow [2023-09-01 11:16:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:43,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:16:43,214 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:16:43,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:16:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:16:43,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:16:43,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:16:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -981188446, now seen corresponding path program 2 times [2023-09-01 11:16:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:16:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480500927] [2023-09-01 11:16:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:16:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:16:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:16:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:43,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:16:43,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480500927] [2023-09-01 11:16:43,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480500927] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:16:43,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409652968] [2023-09-01 11:16:43,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:16:43,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:16:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:16:43,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:16:43,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:16:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:16:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:16:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:16:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:16:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:43,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:16:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:43,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409652968] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:16:43,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:16:43,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:16:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945661460] [2023-09-01 11:16:43,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:16:43,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:16:43,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:16:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:16:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:16:43,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 417 [2023-09-01 11:16:43,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 205.30769230769232) internal successors, (2669), 13 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:43,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:16:43,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 417 [2023-09-01 11:16:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:16:44,050 INFO L130 PetriNetUnfolder]: 1331/2319 cut-off events. [2023-09-01 11:16:44,051 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-09-01 11:16:44,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4545 conditions, 2319 events. 1331/2319 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11280 event pairs, 1250 based on Foata normal form. 6/1977 useless extension candidates. Maximal degree in co-relation 4486. Up to 2152 conditions per place. [2023-09-01 11:16:44,058 INFO L137 encePairwiseOnDemand]: 414/417 looper letters, 38 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-09-01 11:16:44,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 278 flow [2023-09-01 11:16:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:16:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:16:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2503 transitions. [2023-09-01 11:16:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5001998401278976 [2023-09-01 11:16:44,063 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2503 transitions. [2023-09-01 11:16:44,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2503 transitions. [2023-09-01 11:16:44,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:16:44,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2503 transitions. [2023-09-01 11:16:44,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 208.58333333333334) internal successors, (2503), 12 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:44,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 417.0) internal successors, (5421), 13 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:44,076 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 417.0) internal successors, (5421), 13 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:44,076 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 144 flow. Second operand 12 states and 2503 transitions. [2023-09-01 11:16:44,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 278 flow [2023-09-01 11:16:44,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 264 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:16:44,080 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 214 flow [2023-09-01 11:16:44,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-09-01 11:16:44,082 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2023-09-01 11:16:44,082 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 214 flow [2023-09-01 11:16:44,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 205.30769230769232) internal successors, (2669), 13 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:16:44,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:16:44,086 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:16:44,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:16:44,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:16:44,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:16:44,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:16:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1179815550, now seen corresponding path program 3 times [2023-09-01 11:16:44,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:16:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140420982] [2023-09-01 11:16:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:16:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:16:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:16:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:16:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:16:44,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140420982] [2023-09-01 11:16:44,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140420982] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:16:44,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856092364] [2023-09-01 11:16:44,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:16:44,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:16:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:16:44,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:16:44,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:21:31,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 11:21:31,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:21:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 11:21:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:21:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:21:32,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:21:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:21:32,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856092364] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:21:32,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:21:32,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 11:21:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862355666] [2023-09-01 11:21:32,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:21:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:21:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:21:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:21:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:21:32,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 417 [2023-09-01 11:21:32,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 214 flow. Second operand has 25 states, 25 states have (on average 205.16) internal successors, (5129), 25 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:32,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:21:32,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 417 [2023-09-01 11:21:32,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:21:32,608 INFO L130 PetriNetUnfolder]: 1331/2331 cut-off events. [2023-09-01 11:21:32,608 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2023-09-01 11:21:32,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4629 conditions, 2331 events. 1331/2331 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11277 event pairs, 1250 based on Foata normal form. 12/1995 useless extension candidates. Maximal degree in co-relation 4492. Up to 2152 conditions per place. [2023-09-01 11:21:32,620 INFO L137 encePairwiseOnDemand]: 414/417 looper letters, 38 selfloop transitions, 23 changer transitions 0/67 dead transitions. [2023-09-01 11:21:32,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 67 transitions, 432 flow [2023-09-01 11:21:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 11:21:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 11:21:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4969 transitions. [2023-09-01 11:21:32,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49650279776179057 [2023-09-01 11:21:32,632 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4969 transitions. [2023-09-01 11:21:32,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4969 transitions. [2023-09-01 11:21:32,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:21:32,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4969 transitions. [2023-09-01 11:21:32,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 207.04166666666666) internal successors, (4969), 24 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:32,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 417.0) internal successors, (10425), 25 states have internal predecessors, (10425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:32,662 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 417.0) internal successors, (10425), 25 states have internal predecessors, (10425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:32,662 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 214 flow. Second operand 24 states and 4969 transitions. [2023-09-01 11:21:32,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 67 transitions, 432 flow [2023-09-01 11:21:32,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 67 transitions, 360 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-09-01 11:21:32,668 INFO L231 Difference]: Finished difference. Result has 103 places, 67 transitions, 334 flow [2023-09-01 11:21:32,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=334, PETRI_PLACES=103, PETRI_TRANSITIONS=67} [2023-09-01 11:21:32,670 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-09-01 11:21:32,670 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 67 transitions, 334 flow [2023-09-01 11:21:32,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 205.16) internal successors, (5129), 25 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:32,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:21:32,674 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-09-01 11:21:32,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:21:32,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:21:32,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:21:32,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:21:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash -500343998, now seen corresponding path program 4 times [2023-09-01 11:21:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:21:32,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498679298] [2023-09-01 11:21:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:21:32,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:21:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:21:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:21:34,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:21:34,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498679298] [2023-09-01 11:21:34,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498679298] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:21:34,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947302597] [2023-09-01 11:21:34,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:21:34,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:21:34,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:21:34,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:21:34,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:21:34,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:21:34,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:21:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 11:21:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:21:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:21:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:21:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:21:35,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947302597] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:21:35,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:21:35,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 11:21:35,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915433942] [2023-09-01 11:21:35,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:21:35,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 11:21:35,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:21:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 11:21:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 11:21:35,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 417 [2023-09-01 11:21:35,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 67 transitions, 334 flow. Second operand has 49 states, 49 states have (on average 205.08163265306123) internal successors, (10049), 49 states have internal predecessors, (10049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:35,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:21:35,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 417 [2023-09-01 11:21:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:21:35,741 INFO L130 PetriNetUnfolder]: 1331/2355 cut-off events. [2023-09-01 11:21:35,741 INFO L131 PetriNetUnfolder]: For 5241/5241 co-relation queries the response was YES. [2023-09-01 11:21:35,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4773 conditions, 2355 events. 1331/2355 cut-off events. For 5241/5241 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11279 event pairs, 1250 based on Foata normal form. 24/2031 useless extension candidates. Maximal degree in co-relation 4504. Up to 2152 conditions per place. [2023-09-01 11:21:35,749 INFO L137 encePairwiseOnDemand]: 414/417 looper letters, 38 selfloop transitions, 47 changer transitions 0/91 dead transitions. [2023-09-01 11:21:35,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 91 transitions, 696 flow [2023-09-01 11:21:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 11:21:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 11:21:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9901 transitions. [2023-09-01 11:21:35,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494654276578737 [2023-09-01 11:21:35,764 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9901 transitions. [2023-09-01 11:21:35,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9901 transitions. [2023-09-01 11:21:35,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:21:35,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9901 transitions. [2023-09-01 11:21:35,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 206.27083333333334) internal successors, (9901), 48 states have internal predecessors, (9901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:35,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 417.0) internal successors, (20433), 49 states have internal predecessors, (20433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:35,805 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 417.0) internal successors, (20433), 49 states have internal predecessors, (20433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:35,806 INFO L175 Difference]: Start difference. First operand has 103 places, 67 transitions, 334 flow. Second operand 48 states and 9901 transitions. [2023-09-01 11:21:35,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 91 transitions, 696 flow [2023-09-01 11:21:35,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 91 transitions, 552 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-09-01 11:21:35,812 INFO L231 Difference]: Finished difference. Result has 163 places, 91 transitions, 574 flow [2023-09-01 11:21:35,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=417, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=574, PETRI_PLACES=163, PETRI_TRANSITIONS=91} [2023-09-01 11:21:35,814 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2023-09-01 11:21:35,814 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 91 transitions, 574 flow [2023-09-01 11:21:35,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 205.08163265306123) internal successors, (10049), 49 states have internal predecessors, (10049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:21:35,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:21:35,817 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-09-01 11:21:35,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:21:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:21:36,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:21:36,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:21:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -584364350, now seen corresponding path program 5 times [2023-09-01 11:21:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:21:36,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471274411] [2023-09-01 11:21:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:21:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:21:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:21:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:21:39,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:21:39,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471274411] [2023-09-01 11:21:39,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471274411] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:21:39,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995954782] [2023-09-01 11:21:39,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:21:39,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:21:39,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:21:39,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:21:39,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15