./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc --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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:14:07,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:14:07,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:14:07,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:14:07,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:14:07,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:14:07,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:14:07,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:14:07,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:14:07,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:14:07,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:14:07,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:14:07,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:14:07,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:14:07,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:14:07,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:14:07,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:14:07,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:14:07,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:14:07,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:14:07,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:14:07,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:14:07,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:14:07,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:14:07,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:14:07,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:14:07,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:14:07,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:14:07,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:14:07,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:14:07,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:14:07,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:14:07,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:14:07,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:14:07,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:14:07,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:14:07,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:14:07,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:14:07,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:14:07,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:14:07,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:14:07,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:14:07,623 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:14:07,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:14:07,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:14:07,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:14:07,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:14:07,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:14:07,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:14:07,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:14:07,628 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:14:07,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:14:07,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:14:07,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:14:07,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:14:07,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:14:07,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:14:07,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:14:07,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:14:07,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:14:07,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:14:07,638 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:14:07,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:14:07,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:14:07,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:14:07,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:14:07,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:14:07,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:14:07,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:14:07,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:14:07,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:14:07,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:14:07,642 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:14:07,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:14:07,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:14:07,643 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_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-11-02 20:14:08,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:14:08,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:14:08,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:14:08,047 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:14:08,048 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:14:08,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-11-02 20:14:08,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/data/0abb54832/369908c0c6204fa5895fe698e856c114/FLAGda145c591 [2022-11-02 20:14:08,745 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:14:08,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-11-02 20:14:08,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/data/0abb54832/369908c0c6204fa5895fe698e856c114/FLAGda145c591 [2022-11-02 20:14:09,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/data/0abb54832/369908c0c6204fa5895fe698e856c114 [2022-11-02 20:14:09,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:14:09,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:14:09,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:14:09,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:14:09,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:14:09,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703604bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09, skipping insertion in model container [2022-11-02 20:14:09,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:14:09,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:14:09,455 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:14:09,702 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_d63de151-d524-4bc6-a670-4bf1a2236b61/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-11-02 20:14:09,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:14:09,734 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:14:09,766 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-02 20:14:09,805 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_d63de151-d524-4bc6-a670-4bf1a2236b61/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-11-02 20:14:09,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:14:09,860 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:14:09,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09 WrapperNode [2022-11-02 20:14:09,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:14:09,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:14:09,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:14:09,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:14:09,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,954 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-11-02 20:14:09,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:14:09,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:14:09,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:14:09,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:14:09,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:09,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:10,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:10,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:10,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:14:10,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:14:10,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:14:10,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:14:10,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (1/1) ... [2022-11-02 20:14:10,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:14:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:10,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:14:10,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:14:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:14:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-02 20:14:10,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-02 20:14:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:14:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:14:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:14:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:14:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:14:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:14:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:14:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:14:10,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:14:10,106 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:14:10,267 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:14:10,269 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:14:10,576 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:14:10,711 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:14:10,711 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:14:10,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:14:10 BoogieIcfgContainer [2022-11-02 20:14:10,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:14:10,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:14:10,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:14:10,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:14:10,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:14:09" (1/3) ... [2022-11-02 20:14:10,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c8526a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:14:10, skipping insertion in model container [2022-11-02 20:14:10,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:09" (2/3) ... [2022-11-02 20:14:10,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c8526a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:14:10, skipping insertion in model container [2022-11-02 20:14:10,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:14:10" (3/3) ... [2022-11-02 20:14:10,726 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-11-02 20:14:10,737 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:14:10,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:14:10,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:14:10,751 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:14:10,813 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:14:10,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-11-02 20:14:10,919 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-11-02 20:14:10,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:10,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 209 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-11-02 20:14:10,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 75 transitions, 155 flow [2022-11-02 20:14:10,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 155 flow [2022-11-02 20:14:10,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:14:10,951 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70530a8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:14:10,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:14:10,988 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2022-11-02 20:14:10,988 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:10,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:10,990 INFO L208 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] [2022-11-02 20:14:10,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 24858482, now seen corresponding path program 1 times [2022-11-02 20:14:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:11,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560319747] [2022-11-02 20:14:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:11,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:11,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560319747] [2022-11-02 20:14:11,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560319747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:11,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:11,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:14:11,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596540308] [2022-11-02 20:14:11,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:14:11,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:14:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:14:11,440 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 75 [2022-11-02 20:14:11,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 155 flow. Second operand has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:11,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 75 [2022-11-02 20:14:11,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:11,566 INFO L130 PetriNetUnfolder]: 18/173 cut-off events. [2022-11-02 20:14:11,567 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:14:11,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 173 events. 18/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 499 event pairs, 9 based on Foata normal form. 13/164 useless extension candidates. Maximal degree in co-relation 152. Up to 38 conditions per place. [2022-11-02 20:14:11,570 INFO L137 encePairwiseOnDemand]: 72/75 looper letters, 9 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2022-11-02 20:14:11,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 163 flow [2022-11-02 20:14:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:14:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:14:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 134 transitions. [2022-11-02 20:14:11,587 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2022-11-02 20:14:11,588 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 134 transitions. [2022-11-02 20:14:11,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 134 transitions. [2022-11-02 20:14:11,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:11,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 134 transitions. [2022-11-02 20:14:11,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.0) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,602 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,604 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 155 flow. Second operand 2 states and 134 transitions. [2022-11-02 20:14:11,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 163 flow [2022-11-02 20:14:11,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 163 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:11,613 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 145 flow [2022-11-02 20:14:11,615 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=145, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2022-11-02 20:14:11,620 INFO L287 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2022-11-02 20:14:11,620 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 145 flow [2022-11-02 20:14:11,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:11,621 INFO L208 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] [2022-11-02 20:14:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:14:11,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1969669199, now seen corresponding path program 1 times [2022-11-02 20:14:11,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228200868] [2022-11-02 20:14:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:11,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228200868] [2022-11-02 20:14:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228200868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:11,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:11,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727991527] [2022-11-02 20:14:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:14:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:11,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:14:11,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:11,956 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2022-11-02 20:14:11,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:11,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:11,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2022-11-02 20:14:11,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:12,137 INFO L130 PetriNetUnfolder]: 57/297 cut-off events. [2022-11-02 20:14:12,138 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:14:12,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 297 events. 57/297 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1180 event pairs, 20 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 425. Up to 80 conditions per place. [2022-11-02 20:14:12,141 INFO L137 encePairwiseOnDemand]: 69/75 looper letters, 22 selfloop transitions, 4 changer transitions 6/84 dead transitions. [2022-11-02 20:14:12,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 237 flow [2022-11-02 20:14:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:14:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:14:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2022-11-02 20:14:12,144 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2022-11-02 20:14:12,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2022-11-02 20:14:12,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2022-11-02 20:14:12,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:12,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2022-11-02 20:14:12,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,151 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 145 flow. Second operand 3 states and 190 transitions. [2022-11-02 20:14:12,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 237 flow [2022-11-02 20:14:12,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 237 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:12,155 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 173 flow [2022-11-02 20:14:12,156 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-11-02 20:14:12,157 INFO L287 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-11-02 20:14:12,157 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 173 flow [2022-11-02 20:14:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:12,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:14:12,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:12,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1114984198, now seen corresponding path program 1 times [2022-11-02 20:14:12,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:12,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694107501] [2022-11-02 20:14:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:14:12,217 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:14:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:14:12,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:14:12,286 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:14:12,287 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:14:12,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:14:12,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 20:14:12,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:14:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:14:12,295 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:14:12,300 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:14:12,301 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:14:12,341 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:14:12,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-11-02 20:14:12,399 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-11-02 20:14:12,399 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:14:12,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-11-02 20:14:12,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 93 transitions, 198 flow [2022-11-02 20:14:12,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 93 transitions, 198 flow [2022-11-02 20:14:12,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:14:12,419 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70530a8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:14:12,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:14:12,427 INFO L130 PetriNetUnfolder]: 4/53 cut-off events. [2022-11-02 20:14:12,428 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:12,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:12,429 INFO L208 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] [2022-11-02 20:14:12,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:14:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -403506638, now seen corresponding path program 1 times [2022-11-02 20:14:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:12,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85081494] [2022-11-02 20:14:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:12,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:12,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85081494] [2022-11-02 20:14:12,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85081494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:12,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:12,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:14:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068782428] [2022-11-02 20:14:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:14:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:14:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:14:12,513 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 93 [2022-11-02 20:14:12,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:12,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 93 [2022-11-02 20:14:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:12,697 INFO L130 PetriNetUnfolder]: 150/610 cut-off events. [2022-11-02 20:14:12,697 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-02 20:14:12,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 610 events. 150/610 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3432 event pairs, 93 based on Foata normal form. 75/577 useless extension candidates. Maximal degree in co-relation 627. Up to 234 conditions per place. [2022-11-02 20:14:12,704 INFO L137 encePairwiseOnDemand]: 89/93 looper letters, 14 selfloop transitions, 0 changer transitions 0/86 dead transitions. [2022-11-02 20:14:12,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 212 flow [2022-11-02 20:14:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:14:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:14:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 162 transitions. [2022-11-02 20:14:12,717 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-02 20:14:12,717 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 162 transitions. [2022-11-02 20:14:12,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 162 transitions. [2022-11-02 20:14:12,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:12,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 162 transitions. [2022-11-02 20:14:12,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,725 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,725 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 198 flow. Second operand 2 states and 162 transitions. [2022-11-02 20:14:12,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 212 flow [2022-11-02 20:14:12,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:12,730 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 182 flow [2022-11-02 20:14:12,731 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2022-11-02 20:14:12,734 INFO L287 CegarLoopForPetriNet]: 91 programPoint places, -2 predicate places. [2022-11-02 20:14:12,734 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 182 flow [2022-11-02 20:14:12,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:12,735 INFO L208 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] [2022-11-02 20:14:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:14:12,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:14:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1667315025, now seen corresponding path program 1 times [2022-11-02 20:14:12,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:12,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100952336] [2022-11-02 20:14:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:12,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:12,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100952336] [2022-11-02 20:14:12,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100952336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:12,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:12,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971576184] [2022-11-02 20:14:12,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:14:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:14:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:12,922 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 93 [2022-11-02 20:14:12,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:12,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:12,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 93 [2022-11-02 20:14:12,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:13,423 INFO L130 PetriNetUnfolder]: 1077/2533 cut-off events. [2022-11-02 20:14:13,423 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:14:13,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2533 events. 1077/2533 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17442 event pairs, 352 based on Foata normal form. 0/2184 useless extension candidates. Maximal degree in co-relation 4268. Up to 1021 conditions per place. [2022-11-02 20:14:13,444 INFO L137 encePairwiseOnDemand]: 84/93 looper letters, 43 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-11-02 20:14:13,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 329 flow [2022-11-02 20:14:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:14:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:14:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2022-11-02 20:14:13,500 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8207885304659498 [2022-11-02 20:14:13,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2022-11-02 20:14:13,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2022-11-02 20:14:13,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:13,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2022-11-02 20:14:13,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,503 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 182 flow. Second operand 3 states and 229 transitions. [2022-11-02 20:14:13,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 329 flow [2022-11-02 20:14:13,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:13,509 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 236 flow [2022-11-02 20:14:13,510 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2022-11-02 20:14:13,512 INFO L287 CegarLoopForPetriNet]: 91 programPoint places, 2 predicate places. [2022-11-02 20:14:13,512 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 236 flow [2022-11-02 20:14:13,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:13,514 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:13,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:14:13,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:14:13,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash -767453885, now seen corresponding path program 1 times [2022-11-02 20:14:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643446460] [2022-11-02 20:14:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:13,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:14:13,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:14:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:14:13,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:14:13,586 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:14:13,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:14:13,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:14:13,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:14:13,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:14:13,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:14:13,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:14:13,591 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:14:13,592 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:14:13,592 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:14:13,638 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:14:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-11-02 20:14:13,687 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-11-02 20:14:13,687 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:14:13,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-11-02 20:14:13,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 111 transitions, 243 flow [2022-11-02 20:14:13,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 111 transitions, 243 flow [2022-11-02 20:14:13,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:14:13,700 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70530a8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:14:13,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:14:13,707 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2022-11-02 20:14:13,707 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:13,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:13,707 INFO L208 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] [2022-11-02 20:14:13,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:14:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:13,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1301976178, now seen corresponding path program 1 times [2022-11-02 20:14:13,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:13,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451585727] [2022-11-02 20:14:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:13,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:13,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:13,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451585727] [2022-11-02 20:14:13,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451585727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:13,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:13,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:14:13,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766963785] [2022-11-02 20:14:13,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:13,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:14:13,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:14:13,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:14:13,747 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 111 [2022-11-02 20:14:13,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 243 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:13,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:13,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 111 [2022-11-02 20:14:13,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:14,292 INFO L130 PetriNetUnfolder]: 934/2551 cut-off events. [2022-11-02 20:14:14,292 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:14:14,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 2551 events. 934/2551 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 19343 event pairs, 621 based on Foata normal form. 389/2446 useless extension candidates. Maximal degree in co-relation 2921. Up to 1274 conditions per place. [2022-11-02 20:14:14,324 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 19 selfloop transitions, 0 changer transitions 0/102 dead transitions. [2022-11-02 20:14:14,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 263 flow [2022-11-02 20:14:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:14:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:14:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2022-11-02 20:14:14,326 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8558558558558559 [2022-11-02 20:14:14,327 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2022-11-02 20:14:14,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2022-11-02 20:14:14,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:14,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2022-11-02 20:14:14,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,330 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,330 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 243 flow. Second operand 2 states and 190 transitions. [2022-11-02 20:14:14,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 263 flow [2022-11-02 20:14:14,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 102 transitions, 257 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:14,339 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 219 flow [2022-11-02 20:14:14,344 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=219, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-11-02 20:14:14,347 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, -3 predicate places. [2022-11-02 20:14:14,347 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 219 flow [2022-11-02 20:14:14,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:14,348 INFO L208 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] [2022-11-02 20:14:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:14:14,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:14:14,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash -775515820, now seen corresponding path program 1 times [2022-11-02 20:14:14,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081703748] [2022-11-02 20:14:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:14,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:14,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081703748] [2022-11-02 20:14:14,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081703748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:14,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:14,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106896757] [2022-11-02 20:14:14,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:14:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:14:14,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:14,543 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 111 [2022-11-02 20:14:14,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:14,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 111 [2022-11-02 20:14:14,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:19,695 INFO L130 PetriNetUnfolder]: 15145/26652 cut-off events. [2022-11-02 20:14:19,695 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-11-02 20:14:19,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47828 conditions, 26652 events. 15145/26652 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 227322 event pairs, 5877 based on Foata normal form. 0/22805 useless extension candidates. Maximal degree in co-relation 47822. Up to 12218 conditions per place. [2022-11-02 20:14:19,949 INFO L137 encePairwiseOnDemand]: 99/111 looper letters, 58 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2022-11-02 20:14:19,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 132 transitions, 421 flow [2022-11-02 20:14:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:14:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:14:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2022-11-02 20:14:19,952 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048048048048048 [2022-11-02 20:14:19,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2022-11-02 20:14:19,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2022-11-02 20:14:19,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:19,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2022-11-02 20:14:19,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,957 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 219 flow. Second operand 3 states and 268 transitions. [2022-11-02 20:14:19,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 132 transitions, 421 flow [2022-11-02 20:14:19,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 132 transitions, 421 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:19,963 INFO L231 Difference]: Finished difference. Result has 110 places, 110 transitions, 291 flow [2022-11-02 20:14:19,963 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=110, PETRI_TRANSITIONS=110} [2022-11-02 20:14:19,965 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2022-11-02 20:14:19,965 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 110 transitions, 291 flow [2022-11-02 20:14:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:19,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:19,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:14:19,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:14:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash -915373184, now seen corresponding path program 1 times [2022-11-02 20:14:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:19,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340030446] [2022-11-02 20:14:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:14:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340030446] [2022-11-02 20:14:20,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340030446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:20,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:20,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:14:20,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477106273] [2022-11-02 20:14:20,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:20,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:14:20,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:14:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:14:20,607 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 111 [2022-11-02 20:14:20,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 110 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:20,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:20,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 111 [2022-11-02 20:14:20,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:22,635 INFO L130 PetriNetUnfolder]: 4513/11833 cut-off events. [2022-11-02 20:14:22,635 INFO L131 PetriNetUnfolder]: For 1409/1683 co-relation queries the response was YES. [2022-11-02 20:14:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21126 conditions, 11833 events. 4513/11833 cut-off events. For 1409/1683 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 124286 event pairs, 970 based on Foata normal form. 0/10498 useless extension candidates. Maximal degree in co-relation 21118. Up to 3938 conditions per place. [2022-11-02 20:14:22,925 INFO L137 encePairwiseOnDemand]: 99/111 looper letters, 64 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2022-11-02 20:14:22,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 172 transitions, 623 flow [2022-11-02 20:14:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:14:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:14:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 540 transitions. [2022-11-02 20:14:22,929 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2022-11-02 20:14:22,929 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 540 transitions. [2022-11-02 20:14:22,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 540 transitions. [2022-11-02 20:14:22,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:22,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 540 transitions. [2022-11-02 20:14:22,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:22,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 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) [2022-11-02 20:14:22,935 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 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) [2022-11-02 20:14:22,936 INFO L175 Difference]: Start difference. First operand has 110 places, 110 transitions, 291 flow. Second operand 6 states and 540 transitions. [2022-11-02 20:14:22,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 172 transitions, 623 flow [2022-11-02 20:14:22,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 172 transitions, 607 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:14:22,953 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 430 flow [2022-11-02 20:14:22,953 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=430, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2022-11-02 20:14:22,955 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 7 predicate places. [2022-11-02 20:14:22,955 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 430 flow [2022-11-02 20:14:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:22,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:22,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:14:22,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:14:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash -696341705, now seen corresponding path program 1 times [2022-11-02 20:14:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:22,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539363996] [2022-11-02 20:14:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:22,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:23,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:23,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539363996] [2022-11-02 20:14:23,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539363996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:23,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871836286] [2022-11-02 20:14:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:23,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:23,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:23,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:14:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:14:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:23,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:14:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:23,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871836286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:24,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:24,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2022-11-02 20:14:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024465317] [2022-11-02 20:14:24,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:24,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:14:24,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:14:24,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:14:24,213 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 111 [2022-11-02 20:14:24,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 430 flow. Second operand has 14 states, 14 states have (on average 59.57142857142857) internal successors, (834), 14 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:24,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:24,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 111 [2022-11-02 20:14:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:39,709 INFO L130 PetriNetUnfolder]: 43702/76305 cut-off events. [2022-11-02 20:14:39,709 INFO L131 PetriNetUnfolder]: For 24586/24667 co-relation queries the response was YES. [2022-11-02 20:14:39,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178632 conditions, 76305 events. 43702/76305 cut-off events. For 24586/24667 co-relation queries the response was YES. Maximal size of possible extension queue 2851. Compared 739633 event pairs, 3459 based on Foata normal form. 3336/74574 useless extension candidates. Maximal degree in co-relation 178621. Up to 12109 conditions per place. [2022-11-02 20:14:40,346 INFO L137 encePairwiseOnDemand]: 85/111 looper letters, 402 selfloop transitions, 277 changer transitions 0/736 dead transitions. [2022-11-02 20:14:40,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 736 transitions, 3854 flow [2022-11-02 20:14:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:14:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 20:14:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2651 transitions. [2022-11-02 20:14:40,356 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7024377318494965 [2022-11-02 20:14:40,356 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2651 transitions. [2022-11-02 20:14:40,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2651 transitions. [2022-11-02 20:14:40,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:40,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2651 transitions. [2022-11-02 20:14:40,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 77.97058823529412) internal successors, (2651), 34 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:40,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 111.0) internal successors, (3885), 35 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:40,381 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 111.0) internal successors, (3885), 35 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:40,381 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 430 flow. Second operand 34 states and 2651 transitions. [2022-11-02 20:14:40,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 736 transitions, 3854 flow [2022-11-02 20:14:40,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 736 transitions, 3854 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:40,407 INFO L231 Difference]: Finished difference. Result has 176 places, 397 transitions, 2770 flow [2022-11-02 20:14:40,407 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2770, PETRI_PLACES=176, PETRI_TRANSITIONS=397} [2022-11-02 20:14:40,409 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 67 predicate places. [2022-11-02 20:14:40,409 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 397 transitions, 2770 flow [2022-11-02 20:14:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.57142857142857) internal successors, (834), 14 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:40,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:40,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:40,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:40,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d63de151-d524-4bc6-a670-4bf1a2236b61/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:14:40,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:14:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2064953242, now seen corresponding path program 2 times [2022-11-02 20:14:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:40,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113720810] [2022-11-02 20:14:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:40,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:14:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113720810] [2022-11-02 20:14:40,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113720810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:40,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:40,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:14:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854455408] [2022-11-02 20:14:40,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:40,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:14:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:14:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:14:40,952 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 111 [2022-11-02 20:14:40,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 397 transitions, 2770 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:40,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:40,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 111 [2022-11-02 20:14:40,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:47,939 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([496] L719-->L719-3: Formula: (= v_~s~0_22 (+ v_~s~0_23 1)) InVars {~s~0=v_~s~0_23} OutVars{thr1Thread3of3ForFork0_#t~post5#1=|v_thr1Thread3of3ForFork0_#t~post5#1_1|, ~s~0=v_~s~0_22} AuxVars[] AssignedVars[thr1Thread3of3ForFork0_#t~post5#1, ~s~0][282], [Black: 124#(and (= ~t~0 0) (= ~s~0 0)), Black: 126#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |thr1Thread1of3ForFork0_~#l~0#1.base|) |thr1Thread1of3ForFork0_~#l~0#1.offset|) 4294967296))) (= ~s~0 0) (<= 1 (select (select |#memory_int| |thr1Thread1of3ForFork0_~#l~0#1.base|) |thr1Thread1of3ForFork0_~#l~0#1.offset|))), Black: 125#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 32#L719true, Black: 452#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 436#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 418#(and (<= ~t~0 1) (<= 1 ~t~0) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), 46#L717-8true, Black: 456#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), 45#L719-3true, Black: 470#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 426#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 290#(not (= (mod ~c~0 4294967296) 1)), 121#true, Black: 450#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 420#(and (<= ~t~0 1) (<= 1 ~t~0) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 444#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1))), 424#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1))), Black: 448#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1))), Black: 430#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 468#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 280#(= (mod ~c~0 4294967296) 1), Black: 446#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1))), Black: 442#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (<= (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 1) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= |ULTIMATE.start_thr1_~#l~0#1.offset| 0) (= (mod ~c~0 4294967296) 1)), Black: 462#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 434#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (<= (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 1) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0) (= |ULTIMATE.start_thr1_~#l~0#1.offset| 0)), thr1Thread1of3ForFork0InUse, Black: 454#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), thr1Thread2of3ForFork0InUse, Black: 422#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), 499#true, Black: 440#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 460#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), thr1Thread3of3ForFork0InUse, Black: 466#(and (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 458#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 432#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 464#(and (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1))), 112#true, 4#L717-8true, Black: 117#(= ~c~0 1)]) [2022-11-02 20:14:47,939 INFO L383 tUnfolder$Statistics]: this new event has 73 ancestors and is cut-off event [2022-11-02 20:14:47,940 INFO L386 tUnfolder$Statistics]: existing Event has 73 ancestors and is cut-off event [2022-11-02 20:14:47,940 INFO L386 tUnfolder$Statistics]: existing Event has 73 ancestors and is cut-off event [2022-11-02 20:14:47,940 INFO L386 tUnfolder$Statistics]: existing Event has 73 ancestors and is cut-off event [2022-11-02 20:14:53,223 INFO L130 PetriNetUnfolder]: 25030/55417 cut-off events. [2022-11-02 20:14:53,224 INFO L131 PetriNetUnfolder]: For 349980/361070 co-relation queries the response was YES. [2022-11-02 20:14:53,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219759 conditions, 55417 events. 25030/55417 cut-off events. For 349980/361070 co-relation queries the response was YES. Maximal size of possible extension queue 2424. Compared 633738 event pairs, 4064 based on Foata normal form. 168/51777 useless extension candidates. Maximal degree in co-relation 219720. Up to 20393 conditions per place. [2022-11-02 20:14:54,000 INFO L137 encePairwiseOnDemand]: 99/111 looper letters, 195 selfloop transitions, 76 changer transitions 0/440 dead transitions. [2022-11-02 20:14:54,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 440 transitions, 3644 flow [2022-11-02 20:14:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:14:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:14:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 540 transitions. [2022-11-02 20:14:54,003 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2022-11-02 20:14:54,003 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 540 transitions. [2022-11-02 20:14:54,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 540 transitions. [2022-11-02 20:14:54,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:54,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 540 transitions. [2022-11-02 20:14:54,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:54,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 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) [2022-11-02 20:14:54,008 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 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) [2022-11-02 20:14:54,008 INFO L175 Difference]: Start difference. First operand has 176 places, 397 transitions, 2770 flow. Second operand 6 states and 540 transitions. [2022-11-02 20:14:54,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 440 transitions, 3644 flow [2022-11-02 20:15:02,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 440 transitions, 3236 flow, removed 145 selfloop flow, removed 8 redundant places. [2022-11-02 20:15:02,900 INFO L231 Difference]: Finished difference. Result has 174 places, 404 transitions, 2607 flow [2022-11-02 20:15:02,901 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2607, PETRI_PLACES=174, PETRI_TRANSITIONS=404} [2022-11-02 20:15:02,902 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 65 predicate places. [2022-11-02 20:15:02,902 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 404 transitions, 2607 flow [2022-11-02 20:15:02,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:02,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:15:02,903 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:02,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:15:02,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:15:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1878497531, now seen corresponding path program 1 times [2022-11-02 20:15:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:02,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278930319] [2022-11-02 20:15:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:02,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:15:02,919 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:15:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:15:02,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:15:02,934 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:15:02,934 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:15:02,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:15:02,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:15:02,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:15:02,935 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:15:02,936 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:15:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:15:02,936 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-11-02 20:15:02,937 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:15:02,937 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:15:02,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:15:02,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 129 transitions, 290 flow [2022-11-02 20:15:03,008 INFO L130 PetriNetUnfolder]: 23/287 cut-off events. [2022-11-02 20:15:03,008 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:15:03,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 287 events. 23/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 901 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2022-11-02 20:15:03,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 129 transitions, 290 flow [2022-11-02 20:15:03,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 129 transitions, 290 flow [2022-11-02 20:15:03,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:15:03,020 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70530a8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:15:03,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:15:03,024 INFO L130 PetriNetUnfolder]: 5/54 cut-off events. [2022-11-02 20:15:03,025 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:15:03,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:15:03,025 INFO L208 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] [2022-11-02 20:15:03,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:15:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash 846339634, now seen corresponding path program 1 times [2022-11-02 20:15:03,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:03,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620141623] [2022-11-02 20:15:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:03,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:15:03,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620141623] [2022-11-02 20:15:03,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620141623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:03,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:15:03,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:15:03,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443214511] [2022-11-02 20:15:03,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:03,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:15:03,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:15:03,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:15:03,044 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 129 [2022-11-02 20:15:03,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 129 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:03,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:15:03,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 129 [2022-11-02 20:15:03,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:15:04,510 INFO L130 PetriNetUnfolder]: 5094/10988 cut-off events. [2022-11-02 20:15:04,511 INFO L131 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2022-11-02 20:15:04,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17853 conditions, 10988 events. 5094/10988 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 97287 event pairs, 3501 based on Foata normal form. 1903/10664 useless extension candidates. Maximal degree in co-relation 13547. Up to 6458 conditions per place. [2022-11-02 20:15:04,628 INFO L137 encePairwiseOnDemand]: 123/129 looper letters, 24 selfloop transitions, 0 changer transitions 0/118 dead transitions. [2022-11-02 20:15:04,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 118 transitions, 316 flow [2022-11-02 20:15:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:15:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:15:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-11-02 20:15:04,630 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8449612403100775 [2022-11-02 20:15:04,630 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-11-02 20:15:04,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-11-02 20:15:04,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:15:04,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-11-02 20:15:04,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:04,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:04,636 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:04,637 INFO L175 Difference]: Start difference. First operand has 127 places, 129 transitions, 290 flow. Second operand 2 states and 218 transitions. [2022-11-02 20:15:04,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 118 transitions, 316 flow [2022-11-02 20:15:04,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 304 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-02 20:15:04,642 INFO L231 Difference]: Finished difference. Result has 123 places, 118 transitions, 256 flow [2022-11-02 20:15:04,643 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=256, PETRI_PLACES=123, PETRI_TRANSITIONS=118} [2022-11-02 20:15:04,646 INFO L287 CegarLoopForPetriNet]: 127 programPoint places, -4 predicate places. [2022-11-02 20:15:04,646 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 118 transitions, 256 flow [2022-11-02 20:15:04,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:04,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:15:04,647 INFO L208 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] [2022-11-02 20:15:04,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:15:04,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-02 20:15:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1139084463, now seen corresponding path program 1 times [2022-11-02 20:15:04,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:04,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341773226] [2022-11-02 20:15:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:15:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341773226] [2022-11-02 20:15:04,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341773226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:04,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:15:04,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:15:04,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409821846] [2022-11-02 20:15:04,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:04,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:15:04,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:15:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:15:04,733 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2022-11-02 20:15:04,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 118 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:04,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:15:04,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2022-11-02 20:15:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand