./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN --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 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- 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-6b4ec56 [2022-11-20 11:15:53,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:15:53,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:15:53,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:15:53,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:15:53,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:15:53,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:15:53,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:15:53,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:15:53,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:15:53,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:15:53,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:15:53,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:15:53,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:15:53,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:15:53,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:15:53,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:15:53,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:15:53,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:15:53,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:15:53,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:15:53,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:15:53,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:15:53,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:15:53,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:15:53,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:15:53,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:15:53,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:15:53,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:15:53,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:15:53,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:15:53,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:15:53,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:15:53,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:15:53,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:15:53,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:15:53,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:15:53,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:15:53,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:15:53,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:15:53,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:15:53,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:15:53,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:15:53,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:15:53,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:15:53,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:15:53,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:15:53,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:15:53,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:15:53,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:15:53,640 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:15:53,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:15:53,640 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:15:53,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:15:53,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:15:53,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:15:53,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:15:53,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:15:53,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:15:53,643 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:15:53,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:15:53,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:15:53,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:15:53,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:15:53,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:15:53,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:15:53,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:15:53,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:15:53,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:15:53,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:15:53,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:15:53,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:15:53,647 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:15:53,647 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:15:53,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:15:53,648 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_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-11-20 11:15:54,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:15:54,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:15:54,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:15:54,126 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:15:54,140 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:15:54,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-20 11:15:57,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:15:58,440 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:15:58,443 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-11-20 11:15:58,478 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/data/6d4a5d8ef/e31bc00c2a394a50ace3857a012308df/FLAGb18ba1f33 [2022-11-20 11:15:58,495 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/data/6d4a5d8ef/e31bc00c2a394a50ace3857a012308df [2022-11-20 11:15:58,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:15:58,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:15:58,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:15:58,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:15:58,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:15:58,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:58" (1/1) ... [2022-11-20 11:15:58,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175d4efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:58, skipping insertion in model container [2022-11-20 11:15:58,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:58" (1/1) ... [2022-11-20 11:15:58,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:15:58,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:15:59,625 WARN L237 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_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-20 11:15:59,671 WARN L237 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_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-20 11:15:59,686 WARN L237 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_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-20 11:15:59,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:15:59,735 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:15:59,818 WARN L237 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_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-11-20 11:15:59,841 WARN L237 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_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-11-20 11:15:59,846 WARN L237 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_623ad901-5347-4638-921d-1f44c456614e/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-11-20 11:15:59,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:15:59,999 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:16:00,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59 WrapperNode [2022-11-20 11:16:00,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:16:00,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:16:00,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:16:00,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:16:00,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,140 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1719 [2022-11-20 11:16:00,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:16:00,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:16:00,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:16:00,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:16:00,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,250 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:16:00,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:16:00,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:16:00,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:16:00,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (1/1) ... [2022-11-20 11:16:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:16:00,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:00,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:16:00,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:16:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-11-20 11:16:00,495 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-11-20 11:16:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:16:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:16:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:16:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:16:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:16:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:16:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:16:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:16:00,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:16:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:16:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:16:00,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:16:00,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:16:00,502 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:16:00,959 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:16:00,966 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:16:03,859 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:16:04,389 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:16:04,389 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-20 11:16:04,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:04 BoogieIcfgContainer [2022-11-20 11:16:04,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:16:04,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:16:04,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:16:04,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:16:04,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:15:58" (1/3) ... [2022-11-20 11:16:04,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42430463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:04, skipping insertion in model container [2022-11-20 11:16:04,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:59" (2/3) ... [2022-11-20 11:16:04,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42430463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:04, skipping insertion in model container [2022-11-20 11:16:04,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:04" (3/3) ... [2022-11-20 11:16:04,413 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-11-20 11:16:04,426 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:16:04,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:16:04,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-20 11:16:04,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:16:04,726 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:16:04,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1625 places, 1670 transitions, 3348 flow [2022-11-20 11:16:06,873 INFO L130 PetriNetUnfolder]: 89/3097 cut-off events. [2022-11-20 11:16:06,873 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:16:06,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 3097 events. 89/3097 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14322 event pairs, 0 based on Foata normal form. 0/2995 useless extension candidates. Maximal degree in co-relation 1580. Up to 6 conditions per place. [2022-11-20 11:16:06,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 1625 places, 1670 transitions, 3348 flow [2022-11-20 11:16:06,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1625 places, 1670 transitions, 3348 flow [2022-11-20 11:16:06,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:16:07,002 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;@43cc27c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:16:07,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:16:07,032 INFO L130 PetriNetUnfolder]: 11/179 cut-off events. [2022-11-20 11:16:07,032 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:16:07,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:16:07,034 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:07,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:16:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash -348910945, now seen corresponding path program 1 times [2022-11-20 11:16:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:07,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330610138] [2022-11-20 11:16:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:07,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:07,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330610138] [2022-11-20 11:16:07,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330610138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:16:07,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:16:07,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:16:07,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258442126] [2022-11-20 11:16:07,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:16:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:16:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:16:07,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:16:07,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1597 out of 1670 [2022-11-20 11:16:07,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1625 places, 1670 transitions, 3348 flow. Second operand has 2 states, 2 states have (on average 1599.0) internal successors, (3198), 2 states have internal predecessors, (3198), 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) [2022-11-20 11:16:07,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:16:07,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1597 of 1670 [2022-11-20 11:16:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:16:12,392 INFO L130 PetriNetUnfolder]: 360/9225 cut-off events. [2022-11-20 11:16:12,393 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:16:12,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9699 conditions, 9225 events. 360/9225 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 78634 event pairs, 176 based on Foata normal form. 161/9161 useless extension candidates. Maximal degree in co-relation 8147. Up to 468 conditions per place. [2022-11-20 11:16:12,492 INFO L137 encePairwiseOnDemand]: 1654/1670 looper letters, 52 selfloop transitions, 0 changer transitions 0/1649 dead transitions. [2022-11-20 11:16:12,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1621 places, 1649 transitions, 3410 flow [2022-11-20 11:16:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:16:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:16:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3262 transitions. [2022-11-20 11:16:12,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9766467065868264 [2022-11-20 11:16:12,539 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3262 transitions. [2022-11-20 11:16:12,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3262 transitions. [2022-11-20 11:16:12,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:16:12,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3262 transitions. [2022-11-20 11:16:12,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1631.0) internal successors, (3262), 2 states have internal predecessors, (3262), 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) [2022-11-20 11:16:12,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1670.0) internal successors, (5010), 3 states have internal predecessors, (5010), 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) [2022-11-20 11:16:12,605 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1670.0) internal successors, (5010), 3 states have internal predecessors, (5010), 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) [2022-11-20 11:16:12,608 INFO L175 Difference]: Start difference. First operand has 1625 places, 1670 transitions, 3348 flow. Second operand 2 states and 3262 transitions. [2022-11-20 11:16:12,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1621 places, 1649 transitions, 3410 flow [2022-11-20 11:16:12,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1621 places, 1649 transitions, 3410 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:16:12,668 INFO L231 Difference]: Finished difference. Result has 1621 places, 1649 transitions, 3306 flow [2022-11-20 11:16:12,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=1620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3306, PETRI_PLACES=1621, PETRI_TRANSITIONS=1649} [2022-11-20 11:16:12,681 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, -4 predicate places. [2022-11-20 11:16:12,681 INFO L495 AbstractCegarLoop]: Abstraction has has 1621 places, 1649 transitions, 3306 flow [2022-11-20 11:16:12,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1599.0) internal successors, (3198), 2 states have internal predecessors, (3198), 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) [2022-11-20 11:16:12,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:16:12,687 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:16:12,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:16:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1004398752, now seen corresponding path program 1 times [2022-11-20 11:16:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:12,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848689288] [2022-11-20 11:16:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:13,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848689288] [2022-11-20 11:16:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848689288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:16:13,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:16:13,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:16:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956103169] [2022-11-20 11:16:13,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:16:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:16:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:16:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:16:13,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1559 out of 1670 [2022-11-20 11:16:13,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1621 places, 1649 transitions, 3306 flow. Second operand has 3 states, 3 states have (on average 1563.0) internal successors, (4689), 3 states have internal predecessors, (4689), 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) [2022-11-20 11:16:13,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:16:13,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1559 of 1670 [2022-11-20 11:16:13,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:16:21,043 INFO L130 PetriNetUnfolder]: 829/14879 cut-off events. [2022-11-20 11:16:21,043 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:16:21,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16080 conditions, 14879 events. 829/14879 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131876 event pairs, 232 based on Foata normal form. 0/14535 useless extension candidates. Maximal degree in co-relation 16076. Up to 611 conditions per place. [2022-11-20 11:16:21,150 INFO L137 encePairwiseOnDemand]: 1652/1670 looper letters, 143 selfloop transitions, 12 changer transitions 9/1717 dead transitions. [2022-11-20 11:16:21,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1623 places, 1717 transitions, 3758 flow [2022-11-20 11:16:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:16:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:16:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4841 transitions. [2022-11-20 11:16:21,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9662674650698603 [2022-11-20 11:16:21,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4841 transitions. [2022-11-20 11:16:21,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4841 transitions. [2022-11-20 11:16:21,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:16:21,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4841 transitions. [2022-11-20 11:16:21,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1613.6666666666667) internal successors, (4841), 3 states have internal predecessors, (4841), 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) [2022-11-20 11:16:21,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1670.0) internal successors, (6680), 4 states have internal predecessors, (6680), 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) [2022-11-20 11:16:21,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1670.0) internal successors, (6680), 4 states have internal predecessors, (6680), 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) [2022-11-20 11:16:21,199 INFO L175 Difference]: Start difference. First operand has 1621 places, 1649 transitions, 3306 flow. Second operand 3 states and 4841 transitions. [2022-11-20 11:16:21,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1623 places, 1717 transitions, 3758 flow [2022-11-20 11:16:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1623 places, 1717 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:16:21,232 INFO L231 Difference]: Finished difference. Result has 1624 places, 1646 transitions, 3354 flow [2022-11-20 11:16:21,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=1621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3354, PETRI_PLACES=1624, PETRI_TRANSITIONS=1646} [2022-11-20 11:16:21,236 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, -1 predicate places. [2022-11-20 11:16:21,236 INFO L495 AbstractCegarLoop]: Abstraction has has 1624 places, 1646 transitions, 3354 flow [2022-11-20 11:16:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1563.0) internal successors, (4689), 3 states have internal predecessors, (4689), 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) [2022-11-20 11:16:21,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:16:21,241 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:21,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:16:21,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:16:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash -611934805, now seen corresponding path program 1 times [2022-11-20 11:16:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:21,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759571791] [2022-11-20 11:16:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:21,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:21,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759571791] [2022-11-20 11:16:21,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759571791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:21,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291164216] [2022-11-20 11:16:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:21,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:21,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:21,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:16:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:16:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:21,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291164216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:21,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:21,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:16:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179654615] [2022-11-20 11:16:21,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:21,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:16:21,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:16:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:16:21,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1558 out of 1670 [2022-11-20 11:16:22,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1624 places, 1646 transitions, 3354 flow. Second operand has 10 states, 10 states have (on average 1560.9) internal successors, (15609), 10 states have internal predecessors, (15609), 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) [2022-11-20 11:16:22,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:16:22,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1558 of 1670 [2022-11-20 11:16:22,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:16:28,941 INFO L130 PetriNetUnfolder]: 829/14839 cut-off events. [2022-11-20 11:16:28,941 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 11:16:29,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16133 conditions, 14839 events. 829/14839 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131531 event pairs, 174 based on Foata normal form. 2/14521 useless extension candidates. Maximal degree in co-relation 16127. Up to 577 conditions per place. [2022-11-20 11:16:29,063 INFO L137 encePairwiseOnDemand]: 1649/1670 looper letters, 141 selfloop transitions, 26 changer transitions 2/1721 dead transitions. [2022-11-20 11:16:29,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1625 places, 1721 transitions, 3844 flow [2022-11-20 11:16:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:16:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:16:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14193 transitions. [2022-11-20 11:16:29,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.944311377245509 [2022-11-20 11:16:29,104 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14193 transitions. [2022-11-20 11:16:29,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14193 transitions. [2022-11-20 11:16:29,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:16:29,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14193 transitions. [2022-11-20 11:16:29,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1577.0) internal successors, (14193), 9 states have internal predecessors, (14193), 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) [2022-11-20 11:16:29,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1670.0) internal successors, (16700), 10 states have internal predecessors, (16700), 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) [2022-11-20 11:16:29,216 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1670.0) internal successors, (16700), 10 states have internal predecessors, (16700), 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) [2022-11-20 11:16:29,216 INFO L175 Difference]: Start difference. First operand has 1624 places, 1646 transitions, 3354 flow. Second operand 9 states and 14193 transitions. [2022-11-20 11:16:29,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1625 places, 1721 transitions, 3844 flow [2022-11-20 11:16:29,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1624 places, 1721 transitions, 3832 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:16:29,265 INFO L231 Difference]: Finished difference. Result has 1627 places, 1656 transitions, 3468 flow [2022-11-20 11:16:29,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=1616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3468, PETRI_PLACES=1627, PETRI_TRANSITIONS=1656} [2022-11-20 11:16:29,270 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, 2 predicate places. [2022-11-20 11:16:29,270 INFO L495 AbstractCegarLoop]: Abstraction has has 1627 places, 1656 transitions, 3468 flow [2022-11-20 11:16:29,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1560.9) internal successors, (15609), 10 states have internal predecessors, (15609), 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) [2022-11-20 11:16:29,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:16:29,276 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:29,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:29,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:29,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:16:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash 221479553, now seen corresponding path program 2 times [2022-11-20 11:16:29,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:29,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626311433] [2022-11-20 11:16:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:29,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626311433] [2022-11-20 11:16:30,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626311433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466575134] [2022-11-20 11:16:30,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:30,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:30,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:30,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:16:30,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:30,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:30,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:16:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:30,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:16:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466575134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:30,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:30,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-20 11:16:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117545842] [2022-11-20 11:16:30,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:16:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:16:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:16:31,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1558 out of 1670 [2022-11-20 11:16:31,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1627 places, 1656 transitions, 3468 flow. Second operand has 11 states, 11 states have (on average 1560.909090909091) internal successors, (17170), 11 states have internal predecessors, (17170), 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) [2022-11-20 11:16:31,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:16:31,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1558 of 1670 [2022-11-20 11:16:31,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:16:38,480 INFO L130 PetriNetUnfolder]: 829/14892 cut-off events. [2022-11-20 11:16:38,480 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-20 11:16:38,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16322 conditions, 14892 events. 829/14892 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131743 event pairs, 174 based on Foata normal form. 1/14572 useless extension candidates. Maximal degree in co-relation 16314. Up to 577 conditions per place. [2022-11-20 11:16:38,593 INFO L137 encePairwiseOnDemand]: 1650/1670 looper letters, 143 selfloop transitions, 29 changer transitions 0/1724 dead transitions. [2022-11-20 11:16:38,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1638 places, 1724 transitions, 3966 flow [2022-11-20 11:16:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:16:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 11:16:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18869 transitions. [2022-11-20 11:16:38,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9415668662674651 [2022-11-20 11:16:38,633 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 18869 transitions. [2022-11-20 11:16:38,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 18869 transitions. [2022-11-20 11:16:38,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:16:38,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 18869 transitions. [2022-11-20 11:16:38,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1572.4166666666667) internal successors, (18869), 12 states have internal predecessors, (18869), 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) [2022-11-20 11:16:38,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1670.0) internal successors, (21710), 13 states have internal predecessors, (21710), 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) [2022-11-20 11:16:38,739 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1670.0) internal successors, (21710), 13 states have internal predecessors, (21710), 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) [2022-11-20 11:16:38,739 INFO L175 Difference]: Start difference. First operand has 1627 places, 1656 transitions, 3468 flow. Second operand 12 states and 18869 transitions. [2022-11-20 11:16:38,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1638 places, 1724 transitions, 3966 flow [2022-11-20 11:16:38,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1637 places, 1724 transitions, 3942 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:16:38,787 INFO L231 Difference]: Finished difference. Result has 1641 places, 1660 transitions, 3561 flow [2022-11-20 11:16:38,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1670, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3561, PETRI_PLACES=1641, PETRI_TRANSITIONS=1660} [2022-11-20 11:16:38,792 INFO L288 CegarLoopForPetriNet]: 1625 programPoint places, 16 predicate places. [2022-11-20 11:16:38,793 INFO L495 AbstractCegarLoop]: Abstraction has has 1641 places, 1660 transitions, 3561 flow [2022-11-20 11:16:38,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1560.909090909091) internal successors, (17170), 11 states have internal predecessors, (17170), 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) [2022-11-20 11:16:38,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:16:38,799 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:38,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_623ad901-5347-4638-921d-1f44c456614e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:39,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:16:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1383207500, now seen corresponding path program 3 times [2022-11-20 11:16:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:39,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777628038] [2022-11-20 11:16:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:16:39,119 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:16:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:16:39,251 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:16:39,251 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:16:39,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 11:16:39,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 11:16:39,261 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 11:16:39,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 11:16:39,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 11:16:39,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 11:16:39,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:16:39,263 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-20 11:16:39,268 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:16:39,268 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:16:39,600 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:16:39,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1772 places, 1820 transitions, 3658 flow [2022-11-20 11:16:41,568 INFO L130 PetriNetUnfolder]: 140/4719 cut-off events. [2022-11-20 11:16:41,568 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:16:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4733 conditions, 4719 events. 140/4719 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27276 event pairs, 0 based on Foata normal form. 0/4559 useless extension candidates. Maximal degree in co-relation 3099. Up to 9 conditions per place. [2022-11-20 11:16:41,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 1772 places, 1820 transitions, 3658 flow [2022-11-20 11:16:41,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1772 places, 1820 transitions, 3658 flow [2022-11-20 11:16:41,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:16:41,665 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;@43cc27c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:16:41,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:16:41,684 INFO L130 PetriNetUnfolder]: 12/192 cut-off events. [2022-11-20 11:16:41,685 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:16:41,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:16:41,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:41,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:16:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash -60647274, now seen corresponding path program 1 times [2022-11-20 11:16:41,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:41,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326423515] [2022-11-20 11:16:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:41,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:41,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326423515] [2022-11-20 11:16:41,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326423515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:16:41,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:16:41,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:16:41,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310423804] [2022-11-20 11:16:41,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:16:41,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:16:41,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:16:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:16:41,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1740 out of 1820 [2022-11-20 11:16:41,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1772 places, 1820 transitions, 3658 flow. Second operand has 2 states, 2 states have (on average 1743.5) internal successors, (3487), 2 states have internal predecessors, (3487), 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) [2022-11-20 11:16:41,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:16:41,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1740 of 1820 [2022-11-20 11:16:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:16:59,448 INFO L130 PetriNetUnfolder]: 2938/48967 cut-off events. [2022-11-20 11:16:59,449 INFO L131 PetriNetUnfolder]: For 73/77 co-relation queries the response was YES. [2022-11-20 11:17:00,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52504 conditions, 48967 events. 2938/48967 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 635216 event pairs, 1964 based on Foata normal form. 1133/48903 useless extension candidates. Maximal degree in co-relation 9619. Up to 3491 conditions per place. [2022-11-20 11:17:00,196 INFO L137 encePairwiseOnDemand]: 1803/1820 looper letters, 58 selfloop transitions, 0 changer transitions 0/1798 dead transitions. [2022-11-20 11:17:00,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1768 places, 1798 transitions, 3730 flow [2022-11-20 11:17:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:17:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:17:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3555 transitions. [2022-11-20 11:17:00,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9766483516483516 [2022-11-20 11:17:00,205 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3555 transitions. [2022-11-20 11:17:00,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3555 transitions. [2022-11-20 11:17:00,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:17:00,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3555 transitions. [2022-11-20 11:17:00,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1777.5) internal successors, (3555), 2 states have internal predecessors, (3555), 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) [2022-11-20 11:17:00,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1820.0) internal successors, (5460), 3 states have internal predecessors, (5460), 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) [2022-11-20 11:17:00,224 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1820.0) internal successors, (5460), 3 states have internal predecessors, (5460), 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) [2022-11-20 11:17:00,224 INFO L175 Difference]: Start difference. First operand has 1772 places, 1820 transitions, 3658 flow. Second operand 2 states and 3555 transitions. [2022-11-20 11:17:00,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1768 places, 1798 transitions, 3730 flow [2022-11-20 11:17:00,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1768 places, 1798 transitions, 3730 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:17:00,262 INFO L231 Difference]: Finished difference. Result has 1768 places, 1798 transitions, 3614 flow [2022-11-20 11:17:00,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1820, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=1767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3614, PETRI_PLACES=1768, PETRI_TRANSITIONS=1798} [2022-11-20 11:17:00,266 INFO L288 CegarLoopForPetriNet]: 1772 programPoint places, -4 predicate places. [2022-11-20 11:17:00,267 INFO L495 AbstractCegarLoop]: Abstraction has has 1768 places, 1798 transitions, 3614 flow [2022-11-20 11:17:00,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1743.5) internal successors, (3487), 2 states have internal predecessors, (3487), 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) [2022-11-20 11:17:00,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:17:00,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:00,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:17:00,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:17:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash -134612005, now seen corresponding path program 1 times [2022-11-20 11:17:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:00,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031704794] [2022-11-20 11:17:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:00,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:00,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031704794] [2022-11-20 11:17:00,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031704794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:00,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:00,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:17:00,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14293968] [2022-11-20 11:17:00,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:00,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:17:00,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:17:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:17:00,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1702 out of 1820 [2022-11-20 11:17:00,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1768 places, 1798 transitions, 3614 flow. Second operand has 3 states, 3 states have (on average 1707.6666666666667) internal successors, (5123), 3 states have internal predecessors, (5123), 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) [2022-11-20 11:17:00,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:17:00,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1702 of 1820 [2022-11-20 11:17:00,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand