./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa --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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:13:24,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:13:24,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:13:24,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:13:24,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:13:24,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:13:24,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:13:24,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:13:24,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:13:24,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:13:24,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:13:24,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:13:24,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:13:24,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:13:24,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:13:24,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:13:24,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:13:24,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:13:24,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:13:24,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:13:24,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:13:24,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:13:24,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:13:24,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:13:24,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:13:24,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:13:24,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:13:24,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:13:24,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:13:24,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:13:24,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:13:24,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:13:24,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:13:24,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:13:24,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:13:24,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:13:24,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:13:24,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:13:24,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:13:24,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:13:24,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:13:24,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:13:24,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:13:24,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:13:24,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:13:24,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:13:24,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:13:24,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:13:24,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:13:24,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:13:24,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:13:24,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:13:24,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:24,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:13:24,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:13:24,587 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2021-12-06 19:13:24,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:13:24,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:13:24,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:13:24,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:13:24,774 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:13:24,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2021-12-06 19:13:24,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/data/6a3fe5fd9/4f4ba587b9e54b619cfd47c2e2761c03/FLAGbef91c67e [2021-12-06 19:13:25,249 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:13:25,250 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2021-12-06 19:13:25,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/data/6a3fe5fd9/4f4ba587b9e54b619cfd47c2e2761c03/FLAGbef91c67e [2021-12-06 19:13:25,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/data/6a3fe5fd9/4f4ba587b9e54b619cfd47c2e2761c03 [2021-12-06 19:13:25,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:13:25,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:13:25,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:25,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:13:25,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:13:25,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4548f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25, skipping insertion in model container [2021-12-06 19:13:25,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:13:25,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:13:25,433 WARN L610 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-12-06 19:13:25,508 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2021-12-06 19:13:25,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:25,521 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:13:25,532 WARN L610 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-12-06 19:13:25,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2021-12-06 19:13:25,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:25,580 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:13:25,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25 WrapperNode [2021-12-06 19:13:25,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:25,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:25,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:13:25,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:13:25,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,615 INFO L137 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2021-12-06 19:13:25,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:25,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:13:25,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:13:25,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:13:25,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:13:25,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:13:25,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:13:25,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:13:25,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (1/1) ... [2021-12-06 19:13:25,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:25,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:25,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:13:25,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:13:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:13:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:13:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 19:13:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2021-12-06 19:13:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:13:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:13:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2021-12-06 19:13:25,689 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2021-12-06 19:13:25,690 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 19:13:25,763 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:13:25,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:13:25,900 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:13:25,928 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:13:25,928 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 19:13:25,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:25 BoogieIcfgContainer [2021-12-06 19:13:25,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:13:25,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:13:25,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:13:25,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:13:25,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:13:25" (1/3) ... [2021-12-06 19:13:25,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ddb3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:25, skipping insertion in model container [2021-12-06 19:13:25,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:25" (2/3) ... [2021-12-06 19:13:25,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ddb3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:25, skipping insertion in model container [2021-12-06 19:13:25,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:25" (3/3) ... [2021-12-06 19:13:25,936 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2021-12-06 19:13:25,940 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 19:13:25,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:13:25,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:13:25,940 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 19:13:25,971 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,971 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,971 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,971 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,972 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,973 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,974 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,975 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,976 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,976 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,976 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,976 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,976 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,976 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,977 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,978 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,979 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,980 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,981 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,982 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,983 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,983 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,983 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,983 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,983 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,983 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,984 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,985 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,985 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,985 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,985 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,985 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,985 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,986 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,989 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,989 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,989 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,989 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,990 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,990 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,990 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,990 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,990 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,991 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,991 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,991 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,992 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,992 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,992 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,993 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,993 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,993 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,993 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,993 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,993 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,994 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,994 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,994 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,994 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,995 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,995 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,995 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,995 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,995 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:13:25,998 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-06 19:13:26,034 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:13:26,039 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:13:26,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-06 19:13:26,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 114 transitions, 260 flow [2021-12-06 19:13:26,087 INFO L129 PetriNetUnfolder]: 2/110 cut-off events. [2021-12-06 19:13:26,088 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-06 19:13:26,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 2/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2021-12-06 19:13:26,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 114 transitions, 260 flow [2021-12-06 19:13:26,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 213 flow [2021-12-06 19:13:26,108 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-12-06 19:13:26,108 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-06 19:13:26,108 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:26,108 INFO L254 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] [2021-12-06 19:13:26,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2006515335, now seen corresponding path program 1 times [2021-12-06 19:13:26,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:26,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192050230] [2021-12-06 19:13:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:26,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:26,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:26,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192050230] [2021-12-06 19:13:26,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192050230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:26,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:26,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:13:26,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390759722] [2021-12-06 19:13:26,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:26,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:26,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:26,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:26,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2021-12-06 19:13:26,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 84.83333333333333) internal successors, (509), 6 states have internal predecessors, (509), 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) [2021-12-06 19:13:26,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:26,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2021-12-06 19:13:26,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:27,281 INFO L129 PetriNetUnfolder]: 3525/7769 cut-off events. [2021-12-06 19:13:27,281 INFO L130 PetriNetUnfolder]: For 1654/1654 co-relation queries the response was YES. [2021-12-06 19:13:27,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13923 conditions, 7769 events. 3525/7769 cut-off events. For 1654/1654 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 71695 event pairs, 961 based on Foata normal form. 422/7837 useless extension candidates. Maximal degree in co-relation 13398. Up to 1729 conditions per place. [2021-12-06 19:13:27,353 INFO L132 encePairwiseOnDemand]: 102/114 looper letters, 116 selfloop transitions, 32 changer transitions 0/214 dead transitions. [2021-12-06 19:13:27,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 214 transitions, 823 flow [2021-12-06 19:13:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:13:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 19:13:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1160 transitions. [2021-12-06 19:13:27,372 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.847953216374269 [2021-12-06 19:13:27,373 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1160 transitions. [2021-12-06 19:13:27,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1160 transitions. [2021-12-06 19:13:27,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:27,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1160 transitions. [2021-12-06 19:13:27,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.66666666666667) internal successors, (1160), 12 states have internal predecessors, (1160), 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) [2021-12-06 19:13:27,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 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) [2021-12-06 19:13:27,405 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 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) [2021-12-06 19:13:27,407 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 213 flow. Second operand 12 states and 1160 transitions. [2021-12-06 19:13:27,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 214 transitions, 823 flow [2021-12-06 19:13:27,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 214 transitions, 764 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-12-06 19:13:27,436 INFO L242 Difference]: Finished difference. Result has 119 places, 129 transitions, 416 flow [2021-12-06 19:13:27,438 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=416, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2021-12-06 19:13:27,442 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 12 predicate places. [2021-12-06 19:13:27,443 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 416 flow [2021-12-06 19:13:27,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.83333333333333) internal successors, (509), 6 states have internal predecessors, (509), 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) [2021-12-06 19:13:27,444 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:27,444 INFO L254 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] [2021-12-06 19:13:27,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:13:27,444 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1738116757, now seen corresponding path program 1 times [2021-12-06 19:13:27,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:27,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886817534] [2021-12-06 19:13:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:27,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:27,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886817534] [2021-12-06 19:13:27,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886817534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:27,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:27,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:13:27,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085093490] [2021-12-06 19:13:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:13:27,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:13:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:13:27,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 114 [2021-12-06 19:13:27,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-12-06 19:13:27,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:27,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 114 [2021-12-06 19:13:27,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:27,831 INFO L129 PetriNetUnfolder]: 412/2302 cut-off events. [2021-12-06 19:13:27,831 INFO L130 PetriNetUnfolder]: For 379/394 co-relation queries the response was YES. [2021-12-06 19:13:27,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 2302 events. 412/2302 cut-off events. For 379/394 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22522 event pairs, 96 based on Foata normal form. 53/2230 useless extension candidates. Maximal degree in co-relation 3614. Up to 259 conditions per place. [2021-12-06 19:13:27,849 INFO L132 encePairwiseOnDemand]: 108/114 looper letters, 15 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2021-12-06 19:13:27,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 470 flow [2021-12-06 19:13:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:13:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 19:13:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2021-12-06 19:13:27,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9181286549707602 [2021-12-06 19:13:27,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2021-12-06 19:13:27,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2021-12-06 19:13:27,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:27,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2021-12-06 19:13:27,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2021-12-06 19:13:27,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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) [2021-12-06 19:13:27,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 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) [2021-12-06 19:13:27,853 INFO L186 Difference]: Start difference. First operand has 119 places, 129 transitions, 416 flow. Second operand 3 states and 314 transitions. [2021-12-06 19:13:27,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 470 flow [2021-12-06 19:13:27,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 470 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 19:13:27,863 INFO L242 Difference]: Finished difference. Result has 122 places, 129 transitions, 432 flow [2021-12-06 19:13:27,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=122, PETRI_TRANSITIONS=129} [2021-12-06 19:13:27,864 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 15 predicate places. [2021-12-06 19:13:27,864 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 432 flow [2021-12-06 19:13:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-12-06 19:13:27,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:27,865 INFO L254 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] [2021-12-06 19:13:27,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:13:27,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash -546292075, now seen corresponding path program 2 times [2021-12-06 19:13:27,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:27,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991714201] [2021-12-06 19:13:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:27,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:27,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991714201] [2021-12-06 19:13:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991714201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:27,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:27,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:13:27,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600068688] [2021-12-06 19:13:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:27,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:13:27,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:13:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:13:27,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2021-12-06 19:13:27,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 129 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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) [2021-12-06 19:13:27,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:27,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2021-12-06 19:13:27,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:28,480 INFO L129 PetriNetUnfolder]: 1590/4818 cut-off events. [2021-12-06 19:13:28,480 INFO L130 PetriNetUnfolder]: For 2362/2464 co-relation queries the response was YES. [2021-12-06 19:13:28,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10147 conditions, 4818 events. 1590/4818 cut-off events. For 2362/2464 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 48905 event pairs, 145 based on Foata normal form. 50/4728 useless extension candidates. Maximal degree in co-relation 8937. Up to 767 conditions per place. [2021-12-06 19:13:28,519 INFO L132 encePairwiseOnDemand]: 105/114 looper letters, 45 selfloop transitions, 19 changer transitions 4/175 dead transitions. [2021-12-06 19:13:28,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 175 transitions, 737 flow [2021-12-06 19:13:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:13:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:13:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 518 transitions. [2021-12-06 19:13:28,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9087719298245615 [2021-12-06 19:13:28,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 518 transitions. [2021-12-06 19:13:28,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 518 transitions. [2021-12-06 19:13:28,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:28,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 518 transitions. [2021-12-06 19:13:28,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 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) [2021-12-06 19:13:28,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 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) [2021-12-06 19:13:28,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 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) [2021-12-06 19:13:28,525 INFO L186 Difference]: Start difference. First operand has 122 places, 129 transitions, 432 flow. Second operand 5 states and 518 transitions. [2021-12-06 19:13:28,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 175 transitions, 737 flow [2021-12-06 19:13:28,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 19:13:28,545 INFO L242 Difference]: Finished difference. Result has 124 places, 143 transitions, 510 flow [2021-12-06 19:13:28,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2021-12-06 19:13:28,546 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 17 predicate places. [2021-12-06 19:13:28,546 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 510 flow [2021-12-06 19:13:28,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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) [2021-12-06 19:13:28,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:28,547 INFO L254 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] [2021-12-06 19:13:28,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:13:28,547 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 579299824, now seen corresponding path program 1 times [2021-12-06 19:13:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637172269] [2021-12-06 19:13:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:28,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:28,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:28,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637172269] [2021-12-06 19:13:28,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637172269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:28,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:28,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:13:28,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944184625] [2021-12-06 19:13:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:28,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:28,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:28,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:28,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2021-12-06 19:13:28,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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) [2021-12-06 19:13:28,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:28,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2021-12-06 19:13:28,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:30,224 INFO L129 PetriNetUnfolder]: 8131/17870 cut-off events. [2021-12-06 19:13:30,224 INFO L130 PetriNetUnfolder]: For 15541/15620 co-relation queries the response was YES. [2021-12-06 19:13:30,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44383 conditions, 17870 events. 8131/17870 cut-off events. For 15541/15620 co-relation queries the response was YES. Maximal size of possible extension queue 1622. Compared 195712 event pairs, 1270 based on Foata normal form. 20/17360 useless extension candidates. Maximal degree in co-relation 43808. Up to 3340 conditions per place. [2021-12-06 19:13:30,370 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 207 selfloop transitions, 134 changer transitions 25/442 dead transitions. [2021-12-06 19:13:30,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 442 transitions, 2686 flow [2021-12-06 19:13:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:13:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 19:13:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1151 transitions. [2021-12-06 19:13:30,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841374269005848 [2021-12-06 19:13:30,374 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1151 transitions. [2021-12-06 19:13:30,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1151 transitions. [2021-12-06 19:13:30,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:30,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1151 transitions. [2021-12-06 19:13:30,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 95.91666666666667) internal successors, (1151), 12 states have internal predecessors, (1151), 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) [2021-12-06 19:13:30,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 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) [2021-12-06 19:13:30,381 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 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) [2021-12-06 19:13:30,381 INFO L186 Difference]: Start difference. First operand has 124 places, 143 transitions, 510 flow. Second operand 12 states and 1151 transitions. [2021-12-06 19:13:30,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 442 transitions, 2686 flow [2021-12-06 19:13:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 442 transitions, 2680 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-12-06 19:13:30,547 INFO L242 Difference]: Finished difference. Result has 143 places, 298 transitions, 1900 flow [2021-12-06 19:13:30,547 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1900, PETRI_PLACES=143, PETRI_TRANSITIONS=298} [2021-12-06 19:13:30,547 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 36 predicate places. [2021-12-06 19:13:30,548 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 298 transitions, 1900 flow [2021-12-06 19:13:30,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 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) [2021-12-06 19:13:30,548 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:30,548 INFO L254 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] [2021-12-06 19:13:30,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:13:30,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1097766141, now seen corresponding path program 1 times [2021-12-06 19:13:30,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882135418] [2021-12-06 19:13:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:30,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:30,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882135418] [2021-12-06 19:13:30,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882135418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:30,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:30,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:13:30,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936120899] [2021-12-06 19:13:30,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:30,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:30,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:30,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2021-12-06 19:13:30,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 298 transitions, 1900 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 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) [2021-12-06 19:13:30,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:30,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2021-12-06 19:13:30,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:32,861 INFO L129 PetriNetUnfolder]: 9006/19880 cut-off events. [2021-12-06 19:13:32,862 INFO L130 PetriNetUnfolder]: For 29257/29355 co-relation queries the response was YES. [2021-12-06 19:13:32,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59351 conditions, 19880 events. 9006/19880 cut-off events. For 29257/29355 co-relation queries the response was YES. Maximal size of possible extension queue 1796. Compared 221506 event pairs, 1488 based on Foata normal form. 223/19911 useless extension candidates. Maximal degree in co-relation 58727. Up to 4759 conditions per place. [2021-12-06 19:13:33,006 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 237 selfloop transitions, 206 changer transitions 5/524 dead transitions. [2021-12-06 19:13:33,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 524 transitions, 4189 flow [2021-12-06 19:13:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:13:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-06 19:13:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1235 transitions. [2021-12-06 19:13:33,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-12-06 19:13:33,010 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1235 transitions. [2021-12-06 19:13:33,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1235 transitions. [2021-12-06 19:13:33,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:33,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1235 transitions. [2021-12-06 19:13:33,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.0) internal successors, (1235), 13 states have internal predecessors, (1235), 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) [2021-12-06 19:13:33,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 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) [2021-12-06 19:13:33,016 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 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) [2021-12-06 19:13:33,016 INFO L186 Difference]: Start difference. First operand has 143 places, 298 transitions, 1900 flow. Second operand 13 states and 1235 transitions. [2021-12-06 19:13:33,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 524 transitions, 4189 flow [2021-12-06 19:13:33,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 524 transitions, 4189 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 19:13:33,500 INFO L242 Difference]: Finished difference. Result has 163 places, 386 transitions, 3338 flow [2021-12-06 19:13:33,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3338, PETRI_PLACES=163, PETRI_TRANSITIONS=386} [2021-12-06 19:13:33,501 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2021-12-06 19:13:33,501 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 386 transitions, 3338 flow [2021-12-06 19:13:33,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 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) [2021-12-06 19:13:33,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:33,502 INFO L254 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] [2021-12-06 19:13:33,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:13:33,502 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1042275993, now seen corresponding path program 1 times [2021-12-06 19:13:33,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:33,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267908736] [2021-12-06 19:13:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:33,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:33,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:33,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267908736] [2021-12-06 19:13:33,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267908736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:33,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:33,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:13:33,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141345431] [2021-12-06 19:13:33,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:33,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:33,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:33,549 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2021-12-06 19:13:33,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 386 transitions, 3338 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 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) [2021-12-06 19:13:33,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:33,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2021-12-06 19:13:33,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:36,395 INFO L129 PetriNetUnfolder]: 9876/21673 cut-off events. [2021-12-06 19:13:36,395 INFO L130 PetriNetUnfolder]: For 52107/52157 co-relation queries the response was YES. [2021-12-06 19:13:36,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71027 conditions, 21673 events. 9876/21673 cut-off events. For 52107/52157 co-relation queries the response was YES. Maximal size of possible extension queue 1941. Compared 241875 event pairs, 1828 based on Foata normal form. 239/21705 useless extension candidates. Maximal degree in co-relation 67915. Up to 5676 conditions per place. [2021-12-06 19:13:36,570 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 295 selfloop transitions, 249 changer transitions 8/643 dead transitions. [2021-12-06 19:13:36,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 643 transitions, 6329 flow [2021-12-06 19:13:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:13:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-06 19:13:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1239 transitions. [2021-12-06 19:13:36,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8360323886639676 [2021-12-06 19:13:36,574 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1239 transitions. [2021-12-06 19:13:36,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1239 transitions. [2021-12-06 19:13:36,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:36,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1239 transitions. [2021-12-06 19:13:36,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.3076923076923) internal successors, (1239), 13 states have internal predecessors, (1239), 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) [2021-12-06 19:13:36,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 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) [2021-12-06 19:13:36,580 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 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) [2021-12-06 19:13:36,580 INFO L186 Difference]: Start difference. First operand has 163 places, 386 transitions, 3338 flow. Second operand 13 states and 1239 transitions. [2021-12-06 19:13:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 643 transitions, 6329 flow [2021-12-06 19:13:37,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 643 transitions, 6261 flow, removed 18 selfloop flow, removed 1 redundant places. [2021-12-06 19:13:37,408 INFO L242 Difference]: Finished difference. Result has 182 places, 484 transitions, 5114 flow [2021-12-06 19:13:37,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5114, PETRI_PLACES=182, PETRI_TRANSITIONS=484} [2021-12-06 19:13:37,409 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 75 predicate places. [2021-12-06 19:13:37,409 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 484 transitions, 5114 flow [2021-12-06 19:13:37,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 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) [2021-12-06 19:13:37,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:37,410 INFO L254 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] [2021-12-06 19:13:37,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:13:37,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:37,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1127280812, now seen corresponding path program 1 times [2021-12-06 19:13:37,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:37,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881725736] [2021-12-06 19:13:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:37,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:37,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:37,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881725736] [2021-12-06 19:13:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881725736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:37,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:37,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:13:37,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661685244] [2021-12-06 19:13:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:13:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:13:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:13:37,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 114 [2021-12-06 19:13:37,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 484 transitions, 5114 flow. Second operand has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 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) [2021-12-06 19:13:37,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:37,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 114 [2021-12-06 19:13:37,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:37,959 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([261] L738-2-->L741: Formula: (= |v_readerThread1of1ForFork3_~l~0#1_7| (+ (- 1) v_~r~0_3)) InVars {~r~0=v_~r~0_3} OutVars{readerThread1of1ForFork3_~l~0#1=|v_readerThread1of1ForFork3_~l~0#1_7|, ~r~0=v_~r~0_3} AuxVars[] AssignedVars[readerThread1of1ForFork3_~l~0#1][244], [Black: 248#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 171#true, Black: 182#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 241#(and (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 180#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 244#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 254#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|)), Black: 186#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 234#true, Black: 173#(= ~x~0 |readerThread1of1ForFork3_~l~0#1|), Black: 188#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 252#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0)), Black: 237#(= ~y~0 ~x~0), Black: 178#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 133#(= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|), 239#(= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|), 119#L741true, Black: 130#(= |readerThread1of1ForFork0_~l~0#1| ~x~0), Black: 139#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 143#(and (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 145#(and (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 137#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), 58#L754-2true, Black: 128#true, Black: 135#(and (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 220#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|)), Black: 205#(= ~y~0 ~x~0), Black: 216#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 222#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 209#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 73#L717true, Black: 202#true, Black: 212#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 268#(= ~r~0 0), 169#(and (not (= ~w~0 0)) (= ~r~0 0)), 207#(= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|), readerThread1of1ForFork3InUse, 176#(= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|)]) [2021-12-06 19:13:37,959 INFO L384 tUnfolder$Statistics]: this new event has 79 ancestors and is cut-off event [2021-12-06 19:13:37,959 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2021-12-06 19:13:37,959 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2021-12-06 19:13:37,959 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2021-12-06 19:13:37,987 INFO L129 PetriNetUnfolder]: 947/3465 cut-off events. [2021-12-06 19:13:37,988 INFO L130 PetriNetUnfolder]: For 8663/8734 co-relation queries the response was YES. [2021-12-06 19:13:38,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10659 conditions, 3465 events. 947/3465 cut-off events. For 8663/8734 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 34497 event pairs, 124 based on Foata normal form. 114/3539 useless extension candidates. Maximal degree in co-relation 10387. Up to 547 conditions per place. [2021-12-06 19:13:38,014 INFO L132 encePairwiseOnDemand]: 107/114 looper letters, 40 selfloop transitions, 11 changer transitions 44/281 dead transitions. [2021-12-06 19:13:38,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 281 transitions, 2262 flow [2021-12-06 19:13:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:13:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:13:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 522 transitions. [2021-12-06 19:13:38,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9157894736842105 [2021-12-06 19:13:38,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 522 transitions. [2021-12-06 19:13:38,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 522 transitions. [2021-12-06 19:13:38,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:38,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 522 transitions. [2021-12-06 19:13:38,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 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) [2021-12-06 19:13:38,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 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) [2021-12-06 19:13:38,021 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 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) [2021-12-06 19:13:38,022 INFO L186 Difference]: Start difference. First operand has 182 places, 484 transitions, 5114 flow. Second operand 5 states and 522 transitions. [2021-12-06 19:13:38,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 281 transitions, 2262 flow [2021-12-06 19:13:38,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 281 transitions, 2219 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-12-06 19:13:38,088 INFO L242 Difference]: Finished difference. Result has 185 places, 226 transitions, 1692 flow [2021-12-06 19:13:38,089 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1692, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2021-12-06 19:13:38,089 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 78 predicate places. [2021-12-06 19:13:38,090 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 1692 flow [2021-12-06 19:13:38,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 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) [2021-12-06 19:13:38,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:38,090 INFO L254 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] [2021-12-06 19:13:38,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:13:38,090 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash 389266576, now seen corresponding path program 1 times [2021-12-06 19:13:38,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:38,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722269640] [2021-12-06 19:13:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:38,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:38,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:38,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722269640] [2021-12-06 19:13:38,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722269640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:38,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:38,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:38,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670197893] [2021-12-06 19:13:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:38,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:38,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:38,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 114 [2021-12-06 19:13:38,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 1692 flow. Second operand has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 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) [2021-12-06 19:13:38,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:38,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 114 [2021-12-06 19:13:38,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:38,739 INFO L129 PetriNetUnfolder]: 945/3458 cut-off events. [2021-12-06 19:13:38,739 INFO L130 PetriNetUnfolder]: For 8699/8734 co-relation queries the response was YES. [2021-12-06 19:13:38,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11310 conditions, 3458 events. 945/3458 cut-off events. For 8699/8734 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 35065 event pairs, 79 based on Foata normal form. 13/3445 useless extension candidates. Maximal degree in co-relation 10826. Up to 325 conditions per place. [2021-12-06 19:13:38,764 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 58 selfloop transitions, 25 changer transitions 48/301 dead transitions. [2021-12-06 19:13:38,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 301 transitions, 2371 flow [2021-12-06 19:13:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:13:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-06 19:13:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2021-12-06 19:13:38,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8552631578947368 [2021-12-06 19:13:38,767 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2021-12-06 19:13:38,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2021-12-06 19:13:38,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:38,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2021-12-06 19:13:38,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 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) [2021-12-06 19:13:38,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 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) [2021-12-06 19:13:38,772 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 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) [2021-12-06 19:13:38,772 INFO L186 Difference]: Start difference. First operand has 185 places, 226 transitions, 1692 flow. Second operand 10 states and 975 transitions. [2021-12-06 19:13:38,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 301 transitions, 2371 flow [2021-12-06 19:13:38,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 301 transitions, 2312 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-12-06 19:13:38,819 INFO L242 Difference]: Finished difference. Result has 190 places, 226 transitions, 1697 flow [2021-12-06 19:13:38,820 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1697, PETRI_PLACES=190, PETRI_TRANSITIONS=226} [2021-12-06 19:13:38,820 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 83 predicate places. [2021-12-06 19:13:38,820 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 226 transitions, 1697 flow [2021-12-06 19:13:38,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 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) [2021-12-06 19:13:38,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:38,821 INFO L254 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] [2021-12-06 19:13:38,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:13:38,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash 704370720, now seen corresponding path program 2 times [2021-12-06 19:13:38,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777307341] [2021-12-06 19:13:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:38,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:38,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:38,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777307341] [2021-12-06 19:13:38,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777307341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:38,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:38,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:38,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379468578] [2021-12-06 19:13:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:38,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:38,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:38,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:38,880 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 114 [2021-12-06 19:13:38,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 226 transitions, 1697 flow. Second operand has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 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) [2021-12-06 19:13:38,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:13:38,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 114 [2021-12-06 19:13:38,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:13:39,242 INFO L129 PetriNetUnfolder]: 684/2623 cut-off events. [2021-12-06 19:13:39,242 INFO L130 PetriNetUnfolder]: For 7073/7113 co-relation queries the response was YES. [2021-12-06 19:13:39,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 2623 events. 684/2623 cut-off events. For 7073/7113 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25225 event pairs, 52 based on Foata normal form. 58/2653 useless extension candidates. Maximal degree in co-relation 8496. Up to 264 conditions per place. [2021-12-06 19:13:39,261 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 57 selfloop transitions, 22 changer transitions 21/253 dead transitions. [2021-12-06 19:13:39,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 253 transitions, 1945 flow [2021-12-06 19:13:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:13:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 19:13:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2021-12-06 19:13:39,263 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8519736842105263 [2021-12-06 19:13:39,263 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2021-12-06 19:13:39,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2021-12-06 19:13:39,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:13:39,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2021-12-06 19:13:39,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 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) [2021-12-06 19:13:39,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 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) [2021-12-06 19:13:39,267 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 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) [2021-12-06 19:13:39,267 INFO L186 Difference]: Start difference. First operand has 190 places, 226 transitions, 1697 flow. Second operand 8 states and 777 transitions. [2021-12-06 19:13:39,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 253 transitions, 1945 flow [2021-12-06 19:13:39,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 253 transitions, 1877 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-12-06 19:13:39,307 INFO L242 Difference]: Finished difference. Result has 192 places, 205 transitions, 1438 flow [2021-12-06 19:13:39,307 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=192, PETRI_TRANSITIONS=205} [2021-12-06 19:13:39,308 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 85 predicate places. [2021-12-06 19:13:39,308 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 205 transitions, 1438 flow [2021-12-06 19:13:39,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 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) [2021-12-06 19:13:39,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:13:39,308 INFO L254 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] [2021-12-06 19:13:39,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:13:39,309 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-06 19:13:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1489896470, now seen corresponding path program 3 times [2021-12-06 19:13:39,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:39,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485363887] [2021-12-06 19:13:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:39,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:13:39,323 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:13:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:13:39,357 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:13:39,357 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 19:13:39,358 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2021-12-06 19:13:39,359 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2021-12-06 19:13:39,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (4 of 7 remaining) [2021-12-06 19:13:39,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (3 of 7 remaining) [2021-12-06 19:13:39,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION (2 of 7 remaining) [2021-12-06 19:13:39,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION (1 of 7 remaining) [2021-12-06 19:13:39,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2021-12-06 19:13:39,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:13:39,363 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2021-12-06 19:13:39,367 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-06 19:13:39,367 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 19:13:39,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 07:13:39 BasicIcfg [2021-12-06 19:13:39,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 19:13:39,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:13:39,416 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:13:39,416 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:13:39,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:25" (3/4) ... [2021-12-06 19:13:39,417 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 19:13:39,463 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:13:39,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:13:39,464 INFO L158 Benchmark]: Toolchain (without parser) took 14186.62ms. Allocated memory was 88.1MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 53.8MB in the beginning and 1.0GB in the end (delta: -955.3MB). Peak memory consumption was 934.8MB. Max. memory is 16.1GB. [2021-12-06 19:13:39,464 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 71.3MB. Free memory was 49.7MB in the beginning and 49.6MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:13:39,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 303.08ms. Allocated memory is still 88.1MB. Free memory was 53.6MB in the beginning and 54.3MB in the end (delta: -684.0kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 19:13:39,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.92ms. Allocated memory is still 88.1MB. Free memory was 54.3MB in the beginning and 52.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:39,465 INFO L158 Benchmark]: Boogie Preprocessor took 18.84ms. Allocated memory is still 88.1MB. Free memory was 52.2MB in the beginning and 50.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:13:39,466 INFO L158 Benchmark]: RCFGBuilder took 294.89ms. Allocated memory is still 88.1MB. Free memory was 50.6MB in the beginning and 36.7MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 19:13:39,466 INFO L158 Benchmark]: TraceAbstraction took 13484.10ms. Allocated memory was 88.1MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 36.0MB in the beginning and 1.0GB in the end (delta: -985.7MB). Peak memory consumption was 907.9MB. Max. memory is 16.1GB. [2021-12-06 19:13:39,467 INFO L158 Benchmark]: Witness Printer took 47.40ms. Allocated memory is still 2.0GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:13:39,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 71.3MB. Free memory was 49.7MB in the beginning and 49.6MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 303.08ms. Allocated memory is still 88.1MB. Free memory was 53.6MB in the beginning and 54.3MB in the end (delta: -684.0kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.92ms. Allocated memory is still 88.1MB. Free memory was 54.3MB in the beginning and 52.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.84ms. Allocated memory is still 88.1MB. Free memory was 52.2MB in the beginning and 50.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 294.89ms. Allocated memory is still 88.1MB. Free memory was 50.6MB in the beginning and 36.7MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 13484.10ms. Allocated memory was 88.1MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 36.0MB in the beginning and 1.0GB in the end (delta: -985.7MB). Peak memory consumption was 907.9MB. Max. memory is 16.1GB. * Witness Printer took 47.40ms. Allocated memory is still 2.0GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; VAL [r=0, w=0, x=0, y=0] [L748] 0 pthread_t t1, t2, t3, t4; VAL [r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] 4 reach_error() VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 139 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.3s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 12.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 660 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 660 mSDsluCounter, 428 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 819 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1555 IncrementalHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 182 mSDtfsCounter, 1555 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5114occurred in iteration=6, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 535 NumberOfCodeBlocks, 535 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 462 ConstructedInterpolants, 0 QuantifiedInterpolants, 910 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-06 19:13:39,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0709de61-390d-4c71-bc73-0238a4079414/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE