./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/config/KojakReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ee209640ee994f311a04b9c2d813fadfd34b19e8b71a748e88ebcbbe5883af1 --- 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-dbf71c6-m [2022-10-17 16:41:55,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 16:41:55,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 16:41:55,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 16:41:55,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 16:41:55,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 16:41:55,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 16:41:55,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 16:41:55,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 16:41:55,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 16:41:55,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 16:41:55,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 16:41:55,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 16:41:55,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 16:41:55,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 16:41:55,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 16:41:55,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 16:41:55,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 16:41:55,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 16:41:55,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 16:41:55,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 16:41:55,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 16:41:55,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 16:41:55,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 16:41:55,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 16:41:55,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 16:41:55,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 16:41:55,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 16:41:55,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 16:41:55,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 16:41:55,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 16:41:55,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 16:41:55,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 16:41:55,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 16:41:55,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 16:41:55,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 16:41:55,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 16:41:55,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 16:41:55,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 16:41:55,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 16:41:55,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 16:41:55,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/config/svcomp-Reach-32bit-Kojak_Default.epf [2022-10-17 16:41:55,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 16:41:55,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 16:41:55,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 16:41:55,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2022-10-17 16:41:55,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 16:41:55,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 16:41:55,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 16:41:55,858 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 16:41:55,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 16:41:55,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 16:41:55,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 16:41:55,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 16:41:55,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 16:41:55,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 16:41:55,861 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 16:41:55,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 16:41:55,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 16:41:55,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 16:41:55,863 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2022-10-17 16:41:55,863 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2022-10-17 16:41:55,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 16:41:55,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-10-17 16:41:55,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 16:41:55,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 16:41:55,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 16:41:55,865 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2022-10-17 16:41:55,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 16:41:55,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 16:41:55,866 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_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ee209640ee994f311a04b9c2d813fadfd34b19e8b71a748e88ebcbbe5883af1 [2022-10-17 16:41:56,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 16:41:56,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 16:41:56,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 16:41:56,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 16:41:56,266 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 16:41:56,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c [2022-10-17 16:41:56,338 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/data/2dfe57773/eaf8ff3d5430453a97a72cb39aa334a4/FLAGe3fbb25e3 [2022-10-17 16:41:57,577 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 16:41:57,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c [2022-10-17 16:41:57,657 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/data/2dfe57773/eaf8ff3d5430453a97a72cb39aa334a4/FLAGe3fbb25e3 [2022-10-17 16:41:57,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/data/2dfe57773/eaf8ff3d5430453a97a72cb39aa334a4 [2022-10-17 16:41:57,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 16:41:57,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 16:41:57,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 16:41:57,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 16:41:57,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 16:41:57,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 04:41:57" (1/1) ... [2022-10-17 16:41:57,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b658dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:41:57, skipping insertion in model container [2022-10-17 16:41:57,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 04:41:57" (1/1) ... [2022-10-17 16:41:57,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 16:41:58,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 16:42:00,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[381679,381692] [2022-10-17 16:42:00,718 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[383339,383352] [2022-10-17 16:42:01,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 16:42:01,045 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 16:42:02,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[381679,381692] [2022-10-17 16:42:02,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c[383339,383352] [2022-10-17 16:42:02,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 16:42:02,615 INFO L208 MainTranslator]: Completed translation [2022-10-17 16:42:02,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02 WrapperNode [2022-10-17 16:42:02,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 16:42:02,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 16:42:02,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 16:42:02,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 16:42:02,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:02,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:03,443 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2022-10-17 16:42:03,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 16:42:03,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 16:42:03,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 16:42:03,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 16:42:03,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:03,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:03,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:03,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:03,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:03,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:04,072 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:04,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:04,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 16:42:04,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 16:42:04,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 16:42:04,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 16:42:04,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 04:42:02" (1/1) ... [2022-10-17 16:42:04,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2022-10-17 16:42:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/z3 [2022-10-17 16:42:04,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2022-10-17 16:42:04,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b3747a-3817-47b3-b662-f671a2963bdf/bin/ukojak-92XMlrwhuB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2022-10-17 16:42:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 16:42:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 16:42:04,297 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 16:42:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 16:42:04,298 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 16:42:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 16:42:04,298 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 16:42:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-10-17 16:42:04,298 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-10-17 16:42:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 16:42:04,299 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 16:42:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 16:42:04,299 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 16:42:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 16:42:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 16:42:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 16:42:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 16:42:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 16:42:04,480 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 16:42:04,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 16:42:13,393 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 16:42:15,868 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 16:42:15,868 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-10-17 16:42:15,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 04:42:15 BoogieIcfgContainer [2022-10-17 16:42:15,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 16:42:15,882 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2022-10-17 16:42:15,882 INFO L271 PluginConnector]: Initializing CodeCheck... [2022-10-17 16:42:15,893 INFO L275 PluginConnector]: CodeCheck initialized [2022-10-17 16:42:15,894 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 04:42:15" (1/1) ... [2022-10-17 16:42:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 16:42:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 1760 states and 3449 transitions. [2022-10-17 16:42:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 3449 transitions. [2022-10-17 16:42:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:16,079 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 1776 states and 3479 transitions. [2022-10-17 16:42:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3479 transitions. [2022-10-17 16:42:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:17,017 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 1777 states and 3479 transitions. [2022-10-17 16:42:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 3479 transitions. [2022-10-17 16:42:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:17,240 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 1778 states and 3479 transitions. [2022-10-17 16:42:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 3479 transitions. [2022-10-17 16:42:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:17,395 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 1779 states and 3479 transitions. [2022-10-17 16:42:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 3479 transitions. [2022-10-17 16:42:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:17,523 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 1780 states and 3479 transitions. [2022-10-17 16:42:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3479 transitions. [2022-10-17 16:42:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:17,646 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 1781 states and 3479 transitions. [2022-10-17 16:42:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3479 transitions. [2022-10-17 16:42:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:17,775 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:17,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 1793 states and 3502 transitions. [2022-10-17 16:42:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 3502 transitions. [2022-10-17 16:42:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:18,148 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 1794 states and 3502 transitions. [2022-10-17 16:42:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 3502 transitions. [2022-10-17 16:42:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:18,273 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 1795 states and 3502 transitions. [2022-10-17 16:42:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 3502 transitions. [2022-10-17 16:42:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:18,402 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:18,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 1796 states and 3502 transitions. [2022-10-17 16:42:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 3502 transitions. [2022-10-17 16:42:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:18,536 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 1804 states and 3519 transitions. [2022-10-17 16:42:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3519 transitions. [2022-10-17 16:42:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:18,976 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 1805 states and 3519 transitions. [2022-10-17 16:42:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 3519 transitions. [2022-10-17 16:42:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:19,078 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 1806 states and 3519 transitions. [2022-10-17 16:42:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 3519 transitions. [2022-10-17 16:42:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:19,175 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 1808 states and 3524 transitions. [2022-10-17 16:42:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3524 transitions. [2022-10-17 16:42:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 16:42:19,494 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 16:42:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 1816 states and 3539 transitions. [2022-10-17 16:42:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3539 transitions. [2022-10-17 16:42:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 16:42:19,587 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:19,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 16:42:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 1838 states and 3584 transitions. [2022-10-17 16:42:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3584 transitions. [2022-10-17 16:42:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 16:42:20,959 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:20,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 16:42:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2022-10-17 16:42:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 1843 states and 3595 transitions. [2022-10-17 16:42:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 3595 transitions. [2022-10-17 16:42:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 16:42:22,076 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2022-10-17 16:42:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 16:42:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 16:42:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.