./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.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_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/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_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/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_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/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 db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- 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 10:55:57,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:55:57,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:55:57,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:55:57,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:55:57,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:55:57,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:55:57,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:55:57,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:55:57,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:55:57,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:55:57,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:55:57,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:55:57,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:55:57,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:55:57,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:55:57,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:55:57,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:55:57,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:55:57,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:55:57,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:55:57,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:55:57,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:55:57,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:55:57,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:55:57,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:55:57,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:55:57,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:55:57,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:55:57,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:55:57,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:55:57,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:55:57,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:55:57,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:55:57,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:55:57,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:55:57,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:55:57,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:55:57,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:55:57,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:55:57,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:55:57,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:55:57,421 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:55:57,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:55:57,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:55:57,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:55:57,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:55:57,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:55:57,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:55:57,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:55:57,424 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:55:57,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:55:57,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:55:57,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:55:57,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:55:57,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:55:57,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:55:57,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:55:57,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:55:57,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:55:57,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:55:57,427 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:55:57,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:55:57,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:55:57,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:55:57,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:55:57,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:57,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:55:57,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:55:57,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:55:57,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:55:57,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:55:57,430 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:55:57,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:55:57,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:55:57,430 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_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-11-20 10:55:57,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:55:57,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:55:57,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:55:57,710 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:55:57,711 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:55:57,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-20 10:56:00,691 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:56:01,012 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:56:01,012 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-20 10:56:01,036 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/data/e2d2f9946/f0db3b5c1b35408e9f64b5ed651822ed/FLAG207fec726 [2022-11-20 10:56:01,051 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/data/e2d2f9946/f0db3b5c1b35408e9f64b5ed651822ed [2022-11-20 10:56:01,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:56:01,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:56:01,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:56:01,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:56:01,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:56:01,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:01,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ff126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01, skipping insertion in model container [2022-11-20 10:56:01,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:01,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:56:01,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:56:01,719 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_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-20 10:56:01,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:56:01,878 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:56:01,930 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_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-20 10:56:01,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:56:01,998 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:56:01,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01 WrapperNode [2022-11-20 10:56:01,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:56:02,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:56:02,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:56:02,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:56:02,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,101 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-11-20 10:56:02,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:56:02,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:56:02,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:56:02,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:56:02,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:56:02,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:56:02,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:56:02,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:56:02,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (1/1) ... [2022-11-20 10:56:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:56:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:02,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:56:02,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:56:02,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:56:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 10:56:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-20 10:56:02,245 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-20 10:56:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:56:02,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:56:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-20 10:56:02,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-20 10:56:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:56:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 10:56:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:56:02,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:56:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 10:56:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:56:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:56:02,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:56:02,249 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 10:56:02,406 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:56:02,408 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:56:02,908 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:56:02,920 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:56:02,920 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-20 10:56:02,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:56:02 BoogieIcfgContainer [2022-11-20 10:56:02,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:56:02,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:56:02,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:56:02,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:56:02,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:56:01" (1/3) ... [2022-11-20 10:56:02,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61511ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:56:02, skipping insertion in model container [2022-11-20 10:56:02,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:01" (2/3) ... [2022-11-20 10:56:02,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61511ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:56:02, skipping insertion in model container [2022-11-20 10:56:02,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:56:02" (3/3) ... [2022-11-20 10:56:02,933 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-11-20 10:56:02,942 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:56:02,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:56:02,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:56:02,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:56:03,155 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 10:56:03,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 241 transitions, 504 flow [2022-11-20 10:56:03,341 INFO L130 PetriNetUnfolder]: 54/446 cut-off events. [2022-11-20 10:56:03,342 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-20 10:56:03,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 446 events. 54/446 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1748 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 229. Up to 8 conditions per place. [2022-11-20 10:56:03,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 241 transitions, 504 flow [2022-11-20 10:56:03,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 239 transitions, 494 flow [2022-11-20 10:56:03,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:56:03,396 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;@7e9aedfe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:56:03,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:56:03,421 INFO L130 PetriNetUnfolder]: 10/130 cut-off events. [2022-11-20 10:56:03,422 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:56:03,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:03,423 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] [2022-11-20 10:56:03,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:03,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1325719117, now seen corresponding path program 1 times [2022-11-20 10:56:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371768889] [2022-11-20 10:56:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:03,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:03,707 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 10:56:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:03,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371768889] [2022-11-20 10:56:03,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371768889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:03,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:03,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:56:03,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335843572] [2022-11-20 10:56:03,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:03,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:56:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:56:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:56:03,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 241 [2022-11-20 10:56:03,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 239 transitions, 494 flow. Second operand has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 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 10:56:03,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:03,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 241 [2022-11-20 10:56:03,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:03,935 INFO L130 PetriNetUnfolder]: 11/393 cut-off events. [2022-11-20 10:56:03,935 INFO L131 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-11-20 10:56:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 393 events. 11/393 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1458 event pairs, 0 based on Foata normal form. 50/418 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-20 10:56:03,939 INFO L137 encePairwiseOnDemand]: 224/241 looper letters, 4 selfloop transitions, 0 changer transitions 0/221 dead transitions. [2022-11-20 10:56:03,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 221 transitions, 466 flow [2022-11-20 10:56:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:56:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:56:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 455 transitions. [2022-11-20 10:56:03,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9439834024896265 [2022-11-20 10:56:03,963 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 455 transitions. [2022-11-20 10:56:03,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 455 transitions. [2022-11-20 10:56:03,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:03,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 455 transitions. [2022-11-20 10:56:03,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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 10:56:03,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 10:56:03,984 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 10:56:03,986 INFO L175 Difference]: Start difference. First operand has 221 places, 239 transitions, 494 flow. Second operand 2 states and 455 transitions. [2022-11-20 10:56:03,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 221 transitions, 466 flow [2022-11-20 10:56:03,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 221 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:56:03,998 INFO L231 Difference]: Finished difference. Result has 221 places, 221 transitions, 458 flow [2022-11-20 10:56:04,000 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=458, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2022-11-20 10:56:04,007 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 0 predicate places. [2022-11-20 10:56:04,007 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 458 flow [2022-11-20 10:56:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 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 10:56:04,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:04,009 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] [2022-11-20 10:56:04,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:56:04,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1972175826, now seen corresponding path program 1 times [2022-11-20 10:56:04,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424614391] [2022-11-20 10:56:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:04,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:04,178 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 10:56:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:04,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424614391] [2022-11-20 10:56:04,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424614391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:04,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:04,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:56:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599140314] [2022-11-20 10:56:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:04,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:56:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:56:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:56:04,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 241 [2022-11-20 10:56:04,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 10:56:04,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:04,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 241 [2022-11-20 10:56:04,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:04,298 INFO L130 PetriNetUnfolder]: 11/408 cut-off events. [2022-11-20 10:56:04,298 INFO L131 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-11-20 10:56:04,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 408 events. 11/408 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1455 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2022-11-20 10:56:04,302 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 15 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-11-20 10:56:04,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 226 transitions, 502 flow [2022-11-20 10:56:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:56:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:56:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2022-11-20 10:56:04,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8921161825726142 [2022-11-20 10:56:04,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2022-11-20 10:56:04,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2022-11-20 10:56:04,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:04,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2022-11-20 10:56:04,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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 10:56:04,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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 10:56:04,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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 10:56:04,312 INFO L175 Difference]: Start difference. First operand has 221 places, 221 transitions, 458 flow. Second operand 3 states and 645 transitions. [2022-11-20 10:56:04,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 226 transitions, 502 flow [2022-11-20 10:56:04,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:56:04,319 INFO L231 Difference]: Finished difference. Result has 224 places, 222 transitions, 470 flow [2022-11-20 10:56:04,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=470, PETRI_PLACES=224, PETRI_TRANSITIONS=222} [2022-11-20 10:56:04,321 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 3 predicate places. [2022-11-20 10:56:04,321 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 222 transitions, 470 flow [2022-11-20 10:56:04,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 10:56:04,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:04,322 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] [2022-11-20 10:56:04,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:56:04,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -56279307, now seen corresponding path program 1 times [2022-11-20 10:56:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:04,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346305988] [2022-11-20 10:56:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:04,561 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 10:56:04,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346305988] [2022-11-20 10:56:04,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346305988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119487686] [2022-11-20 10:56:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:04,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:04,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:04,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:56:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:56:04,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:04,840 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 10:56:04,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:04,905 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 10:56:04,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119487686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:04,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:04,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:56:04,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642999460] [2022-11-20 10:56:04,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:04,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:04,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-11-20 10:56:04,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 222 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 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 10:56:04,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:04,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-11-20 10:56:04,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:05,133 INFO L130 PetriNetUnfolder]: 11/426 cut-off events. [2022-11-20 10:56:05,133 INFO L131 PetriNetUnfolder]: For 20/30 co-relation queries the response was YES. [2022-11-20 10:56:05,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 426 events. 11/426 cut-off events. For 20/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1382 event pairs, 0 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 474. Up to 12 conditions per place. [2022-11-20 10:56:05,138 INFO L137 encePairwiseOnDemand]: 235/241 looper letters, 17 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2022-11-20 10:56:05,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 234 transitions, 548 flow [2022-11-20 10:56:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:56:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1900 transitions. [2022-11-20 10:56:05,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.875979714153988 [2022-11-20 10:56:05,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1900 transitions. [2022-11-20 10:56:05,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1900 transitions. [2022-11-20 10:56:05,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:05,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1900 transitions. [2022-11-20 10:56:05,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.11111111111111) internal successors, (1900), 9 states have internal predecessors, (1900), 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 10:56:05,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 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 10:56:05,157 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 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 10:56:05,158 INFO L175 Difference]: Start difference. First operand has 224 places, 222 transitions, 470 flow. Second operand 9 states and 1900 transitions. [2022-11-20 10:56:05,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 234 transitions, 548 flow [2022-11-20 10:56:05,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 234 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:56:05,164 INFO L231 Difference]: Finished difference. Result has 234 places, 228 transitions, 518 flow [2022-11-20 10:56:05,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=518, PETRI_PLACES=234, PETRI_TRANSITIONS=228} [2022-11-20 10:56:05,165 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 13 predicate places. [2022-11-20 10:56:05,166 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 228 transitions, 518 flow [2022-11-20 10:56:05,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 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 10:56:05,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:05,168 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 10:56:05,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:05,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:05,375 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1794391237, now seen corresponding path program 2 times [2022-11-20 10:56:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:05,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552261278] [2022-11-20 10:56:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:05,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:05,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552261278] [2022-11-20 10:56:05,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552261278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:05,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072733214] [2022-11-20 10:56:05,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:05,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:05,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:05,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:05,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:56:06,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:56:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:06,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:06,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072733214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:06,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:06,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 10:56:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847269218] [2022-11-20 10:56:06,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:56:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:56:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:56:06,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-11-20 10:56:06,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 228 transitions, 518 flow. Second operand has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 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 10:56:06,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:06,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-11-20 10:56:06,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:06,771 INFO L130 PetriNetUnfolder]: 11/490 cut-off events. [2022-11-20 10:56:06,772 INFO L131 PetriNetUnfolder]: For 40/50 co-relation queries the response was YES. [2022-11-20 10:56:06,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 490 events. 11/490 cut-off events. For 40/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1379 event pairs, 0 based on Foata normal form. 4/470 useless extension candidates. Maximal degree in co-relation 609. Up to 12 conditions per place. [2022-11-20 10:56:06,777 INFO L137 encePairwiseOnDemand]: 235/241 looper letters, 29 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-11-20 10:56:06,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 738 flow [2022-11-20 10:56:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:56:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:56:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4422 transitions. [2022-11-20 10:56:06,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8737403675163011 [2022-11-20 10:56:06,788 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4422 transitions. [2022-11-20 10:56:06,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4422 transitions. [2022-11-20 10:56:06,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:06,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4422 transitions. [2022-11-20 10:56:06,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 210.57142857142858) internal successors, (4422), 21 states have internal predecessors, (4422), 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 10:56:06,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 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 10:56:06,839 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 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 10:56:06,840 INFO L175 Difference]: Start difference. First operand has 234 places, 228 transitions, 518 flow. Second operand 21 states and 4422 transitions. [2022-11-20 10:56:06,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 738 flow [2022-11-20 10:56:06,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 258 transitions, 724 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 10:56:06,849 INFO L231 Difference]: Finished difference. Result has 258 places, 241 transitions, 642 flow [2022-11-20 10:56:06,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=642, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-11-20 10:56:06,851 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 37 predicate places. [2022-11-20 10:56:06,852 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 642 flow [2022-11-20 10:56:06,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 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 10:56:06,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:06,854 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2022-11-20 10:56:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:07,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:07,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:56:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash 536937415, now seen corresponding path program 3 times [2022-11-20 10:56:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:07,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135984512] [2022-11-20 10:56:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:56:07,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135984512] [2022-11-20 10:56:07,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135984512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:07,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632365241] [2022-11-20 10:56:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:56:07,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:07,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:07,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbea26a6-9cda-4f8e-afa5-67e1e1d96dc1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process