./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -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 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:43:35,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:43:35,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:43:35,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:43:35,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:43:35,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:43:35,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:43:35,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:43:35,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:43:35,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:43:35,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:43:35,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:43:35,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:43:35,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:43:35,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:43:35,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:43:35,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:43:35,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:43:35,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:43:35,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:43:35,345 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:43:35,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:43:35,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:43:35,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:43:35,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:43:35,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:43:35,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:43:35,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:43:35,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:43:35,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:43:35,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:43:35,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:43:35,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:43:35,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:43:35,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:43:35,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:43:35,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:43:35,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:43:35,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:43:35,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:43:35,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:43:35,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:43:35,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:43:35,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:43:35,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:43:35,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:43:35,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:43:35,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:43:35,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:43:35,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:43:35,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:43:35,387 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:43:35,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:43:35,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:43:35,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:43:35,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:43:35,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:43:35,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:43:35,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:43:35,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:43:35,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:43:35,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:43:35,390 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:43:35,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:43:35,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:43:35,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:43:35,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:43:35,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:43:35,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:43:35,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:43:35,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:43:35,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:43:35,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:43:35,392 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:43:35,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:43:35,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:43:35,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2022-07-22 21:43:35,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:43:35,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:43:35,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:43:35,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:43:35,582 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:43:35,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-07-22 21:43:35,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3becf62e3/e6180c93d2f643129f4af724aa2967fb/FLAGc75937539 [2022-07-22 21:43:35,997 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:43:35,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-07-22 21:43:36,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3becf62e3/e6180c93d2f643129f4af724aa2967fb/FLAGc75937539 [2022-07-22 21:43:36,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3becf62e3/e6180c93d2f643129f4af724aa2967fb [2022-07-22 21:43:36,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:43:36,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:43:36,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:43:36,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:43:36,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:43:36,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c2dde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36, skipping insertion in model container [2022-07-22 21:43:36,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:43:36,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:43:36,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-07-22 21:43:36,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:43:36,235 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:43:36,264 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-07-22 21:43:36,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:43:36,275 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:43:36,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36 WrapperNode [2022-07-22 21:43:36,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:43:36,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:43:36,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:43:36,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:43:36,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,307 INFO L137 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 440 [2022-07-22 21:43:36,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:43:36,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:43:36,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:43:36,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:43:36,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:43:36,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:43:36,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:43:36,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:43:36,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (1/1) ... [2022-07-22 21:43:36,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:43:36,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:36,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:43:36,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:43:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:43:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:43:36,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:43:36,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:43:36,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:43:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:43:36,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:43:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:43:36,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:43:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:43:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:43:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:43:36,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:43:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:43:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:43:36,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:43:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:43:36,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:43:36,411 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:43:36,485 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:43:36,486 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:43:36,891 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:43:37,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:43:37,073 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 21:43:37,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:43:37 BoogieIcfgContainer [2022-07-22 21:43:37,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:43:37,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:43:37,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:43:37,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:43:37,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:43:36" (1/3) ... [2022-07-22 21:43:37,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623a5328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:43:37, skipping insertion in model container [2022-07-22 21:43:37,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:36" (2/3) ... [2022-07-22 21:43:37,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623a5328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:43:37, skipping insertion in model container [2022-07-22 21:43:37,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:43:37" (3/3) ... [2022-07-22 21:43:37,085 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2022-07-22 21:43:37,089 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:43:37,095 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:43:37,095 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:43:37,095 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:43:37,175 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:43:37,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 436 flow [2022-07-22 21:43:37,314 INFO L129 PetriNetUnfolder]: 2/198 cut-off events. [2022-07-22 21:43:37,314 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:43:37,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 198 events. 2/198 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 206 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-07-22 21:43:37,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 202 transitions, 436 flow [2022-07-22 21:43:37,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 185 transitions, 394 flow [2022-07-22 21:43:37,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:43:37,354 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19791e3c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@33fe1e78 [2022-07-22 21:43:37,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:43:37,392 INFO L129 PetriNetUnfolder]: 2/184 cut-off events. [2022-07-22 21:43:37,392 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:43:37,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:37,393 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:37,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:43:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash 560411039, now seen corresponding path program 1 times [2022-07-22 21:43:37,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:37,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413783470] [2022-07-22 21:43:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:37,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:38,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:38,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413783470] [2022-07-22 21:43:38,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413783470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:38,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:38,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-22 21:43:38,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455961966] [2022-07-22 21:43:38,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:38,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 21:43:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:38,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 21:43:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:43:38,230 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 202 [2022-07-22 21:43:38,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 185 transitions, 394 flow. Second operand has 15 states, 15 states have (on average 127.93333333333334) internal successors, (1919), 15 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:38,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:38,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 202 [2022-07-22 21:43:38,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:53,924 INFO L129 PetriNetUnfolder]: 93240/165958 cut-off events. [2022-07-22 21:43:53,925 INFO L130 PetriNetUnfolder]: For 11533/11533 co-relation queries the response was YES. [2022-07-22 21:43:54,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302885 conditions, 165958 events. 93240/165958 cut-off events. For 11533/11533 co-relation queries the response was YES. Maximal size of possible extension queue 3498. Compared 1709710 event pairs, 56436 based on Foata normal form. 9/165022 useless extension candidates. Maximal degree in co-relation 301046. Up to 76469 conditions per place. [2022-07-22 21:43:55,069 INFO L132 encePairwiseOnDemand]: 180/202 looper letters, 341 selfloop transitions, 31 changer transitions 30/509 dead transitions. [2022-07-22 21:43:55,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 509 transitions, 1948 flow [2022-07-22 21:43:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:43:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:43:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3610 transitions. [2022-07-22 21:43:55,086 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6873571972581873 [2022-07-22 21:43:55,087 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3610 transitions. [2022-07-22 21:43:55,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3610 transitions. [2022-07-22 21:43:55,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:55,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3610 transitions. [2022-07-22 21:43:55,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 138.84615384615384) internal successors, (3610), 26 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:55,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 202.0) internal successors, (5454), 27 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:55,121 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 202.0) internal successors, (5454), 27 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:55,123 INFO L186 Difference]: Start difference. First operand has 196 places, 185 transitions, 394 flow. Second operand 26 states and 3610 transitions. [2022-07-22 21:43:55,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 509 transitions, 1948 flow [2022-07-22 21:43:56,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 509 transitions, 1864 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:43:56,323 INFO L242 Difference]: Finished difference. Result has 220 places, 210 transitions, 543 flow [2022-07-22 21:43:56,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=543, PETRI_PLACES=220, PETRI_TRANSITIONS=210} [2022-07-22 21:43:56,327 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, 24 predicate places. [2022-07-22 21:43:56,328 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 210 transitions, 543 flow [2022-07-22 21:43:56,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 127.93333333333334) internal successors, (1919), 15 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:56,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:56,329 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:56,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:43:56,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:43:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1383593079, now seen corresponding path program 2 times [2022-07-22 21:43:56,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:56,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189994180] [2022-07-22 21:43:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:56,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189994180] [2022-07-22 21:43:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189994180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:56,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:56,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:43:56,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315980149] [2022-07-22 21:43:56,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:56,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:43:56,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:43:56,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:43:56,442 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 202 [2022-07-22 21:43:56,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 210 transitions, 543 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:56,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:56,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 202 [2022-07-22 21:43:56,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:04,504 INFO L129 PetriNetUnfolder]: 54028/98174 cut-off events. [2022-07-22 21:44:04,504 INFO L130 PetriNetUnfolder]: For 2539/2539 co-relation queries the response was YES. [2022-07-22 21:44:04,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183907 conditions, 98174 events. 54028/98174 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 973514 event pairs, 36143 based on Foata normal form. 2050/99561 useless extension candidates. Maximal degree in co-relation 183869. Up to 46800 conditions per place. [2022-07-22 21:44:05,191 INFO L132 encePairwiseOnDemand]: 197/202 looper letters, 81 selfloop transitions, 2 changer transitions 0/240 dead transitions. [2022-07-22 21:44:05,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 240 transitions, 772 flow [2022-07-22 21:44:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:44:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:44:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-07-22 21:44:05,194 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8646864686468647 [2022-07-22 21:44:05,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-07-22 21:44:05,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-07-22 21:44:05,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:05,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-07-22 21:44:05,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:05,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:05,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:05,197 INFO L186 Difference]: Start difference. First operand has 220 places, 210 transitions, 543 flow. Second operand 3 states and 524 transitions. [2022-07-22 21:44:05,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 240 transitions, 772 flow [2022-07-22 21:44:05,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 240 transitions, 762 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-22 21:44:05,237 INFO L242 Difference]: Finished difference. Result has 204 places, 210 transitions, 545 flow [2022-07-22 21:44:05,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=545, PETRI_PLACES=204, PETRI_TRANSITIONS=210} [2022-07-22 21:44:05,238 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, 8 predicate places. [2022-07-22 21:44:05,238 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 210 transitions, 545 flow [2022-07-22 21:44:05,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:05,238 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:05,239 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:44:05,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:44:05,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:44:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1826355215, now seen corresponding path program 3 times [2022-07-22 21:44:05,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:05,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493772771] [2022-07-22 21:44:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:05,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493772771] [2022-07-22 21:44:05,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493772771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:44:05,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:44:05,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:44:05,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832769585] [2022-07-22 21:44:05,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:44:05,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:44:05,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:44:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:44:05,343 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 202 [2022-07-22 21:44:05,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 210 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:05,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:05,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 202 [2022-07-22 21:44:05,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand