./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ --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 64bit --witnessprinter.graph.data.programhash 3d776a54fbebbd358d59ab0126298feae1e40360b6fb5e6158cd54ba5ef877f7 --- 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 10:41:52,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:41:52,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:41:52,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:41:52,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:41:52,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:41:52,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:41:52,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:41:52,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:41:52,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:41:52,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:41:52,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:41:52,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:41:52,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:41:52,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:41:52,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:41:52,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:41:52,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:41:52,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:41:52,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:41:52,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:41:52,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:41:52,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:41:52,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:41:52,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:41:52,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:41:52,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:41:52,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:41:52,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:41:52,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:41:52,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:41:52,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:41:52,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:41:52,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:41:52,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:41:52,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:41:52,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:41:52,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:41:52,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:41:52,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:41:52,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:41:52,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-10-17 10:41:52,543 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:41:52,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:41:52,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:41:52,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:41:52,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:41:52,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:41:52,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:41:52,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:41:52,551 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:41:52,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:41:52,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:41:52,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:41:52,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:41:52,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:41:52,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:41:52,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:41:52,554 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:41:52,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:41:52,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:41:52,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:41:52,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:41:52,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:41:52,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:41:52,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:41:52,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:41:52,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:41:52,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:41:52,556 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:41:52,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:41:52,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:41:52,557 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_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d776a54fbebbd358d59ab0126298feae1e40360b6fb5e6158cd54ba5ef877f7 [2022-10-17 10:41:52,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:41:52,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:41:52,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:41:52,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:41:52,835 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:41:52,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i [2022-10-17 10:41:52,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/data/14f95e49a/fc9cb2126f55427bb3789fa63162e9f1/FLAG4adcffa32 [2022-10-17 10:41:53,934 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:41:53,935 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i [2022-10-17 10:41:54,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/data/14f95e49a/fc9cb2126f55427bb3789fa63162e9f1/FLAG4adcffa32 [2022-10-17 10:41:54,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/data/14f95e49a/fc9cb2126f55427bb3789fa63162e9f1 [2022-10-17 10:41:54,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:41:54,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:41:54,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:41:54,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:41:54,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:41:54,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:41:54" (1/1) ... [2022-10-17 10:41:54,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58501b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:54, skipping insertion in model container [2022-10-17 10:41:54,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:41:54" (1/1) ... [2022-10-17 10:41:54,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:41:54,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:41:58,042 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_354d6a6d-34b0-4303-93c3-8c9ac303320a/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i[462796,462809] [2022-10-17 10:41:58,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:41:58,272 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:41:58,820 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_354d6a6d-34b0-4303-93c3-8c9ac303320a/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i[462796,462809] [2022-10-17 10:41:58,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:41:59,029 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:41:59,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59 WrapperNode [2022-10-17 10:41:59,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:41:59,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:41:59,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:41:59,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:41:59,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,499 INFO L138 Inliner]: procedures = 445, calls = 3482, calls flagged for inlining = 226, calls inlined = 196, statements flattened = 7816 [2022-10-17 10:41:59,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:41:59,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:41:59,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:41:59,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:41:59,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,815 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:41:59,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:41:59,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:41:59,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:41:59,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (1/1) ... [2022-10-17 10:41:59,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:41:59,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:00,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:42:00,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6a6d-34b0-4303-93c3-8c9ac303320a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:42:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure vq_access_ok [2022-10-17 10:42:00,065 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_access_ok [2022-10-17 10:42:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure wake_up_process [2022-10-17 10:42:00,065 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_up_process [2022-10-17 10:42:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-10-17 10:42:00,066 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-10-17 10:42:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 10:42:00,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 10:42:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure __put_user_bad [2022-10-17 10:42:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_release_fabric_acl [2022-10-17 10:42:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_release_fabric_acl [2022-10-17 10:42:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-10-17 10:42:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-10-17 10:42:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_access_ok [2022-10-17 10:42:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_access_ok [2022-10-17 10:42:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_close_session [2022-10-17 10:42:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_close_session [2022-10-17 10:42:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-10-17 10:42:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_queue [2022-10-17 10:42:00,068 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_queue [2022-10-17 10:42:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:42:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_tcm_vhost_mutex [2022-10-17 10:42:00,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_tcm_vhost_mutex [2022-10-17 10:42:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-10-17 10:42:00,069 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-10-17 10:42:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-10-17 10:42:00,069 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-10-17 10:42:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure fput [2022-10-17 10:42:00,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fput [2022-10-17 10:42:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure next_desc [2022-10-17 10:42:00,070 INFO L138 BoogieDeclarations]: Found implementation of procedure next_desc [2022-10-17 10:42:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_drop_tpg [2022-10-17 10:42:00,070 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_drop_tpg [2022-10-17 10:42:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-10-17 10:42:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-10-17 10:42:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-10-17 10:42:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-10-17 10:42:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_open [2022-10-17 10:42:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_open [2022-10-17 10:42:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 10:42:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-10-17 10:42:00,072 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-10-17 10:42:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_has_feature [2022-10-17 10:42:00,072 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_has_feature [2022-10-17 10:42:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2022-10-17 10:42:00,073 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2022-10-17 10:42:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-10-17 10:42:00,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-10-17 10:42:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 10:42:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:42:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 10:42:00,074 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 10:42:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_init [2022-10-17 10:42:00,074 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_init [2022-10-17 10:42:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure __get_user_bad [2022-10-17 10:42:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-10-17 10:42:00,075 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-10-17 10:42:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_complete_cmd [2022-10-17 10:42:00,077 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_complete_cmd [2022-10-17 10:42:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-10-17 10:42:00,077 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-10-17 10:42:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex [2022-10-17 10:42:00,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex [2022-10-17 10:42:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure translate_desc [2022-10-17 10:42:00,077 INFO L138 BoogieDeclarations]: Found implementation of procedure translate_desc [2022-10-17 10:42:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_ctx_put [2022-10-17 10:42:00,078 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_ctx_put [2022-10-17 10:42:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-10-17 10:42:00,079 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-10-17 10:42:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure sas_get_pr_transport_id [2022-10-17 10:42:00,079 INFO L138 BoogieDeclarations]: Found implementation of procedure sas_get_pr_transport_id [2022-10-17 10:42:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_tv_tpg_mutex [2022-10-17 10:42:00,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_tv_tpg_mutex [2022-10-17 10:42:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:42:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:42:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:42:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-10-17 10:42:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure kthread_stop [2022-10-17 10:42:00,081 INFO L138 BoogieDeclarations]: Found implementation of procedure kthread_stop [2022-10-17 10:42:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 10:42:00,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 10:42:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-10-17 10:42:00,082 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-10-17 10:42:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_seq_done [2022-10-17 10:42:00,082 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_seq_done [2022-10-17 10:42:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_disable_notify [2022-10-17 10:42:00,082 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_disable_notify [2022-10-17 10:42:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-10-17 10:42:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-10-17 10:42:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_update_used_flags [2022-10-17 10:42:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_update_used_flags [2022-10-17 10:42:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_from_user [2022-10-17 10:42:00,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_from_user [2022-10-17 10:42:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure lock_is_held [2022-10-17 10:42:00,084 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_is_held [2022-10-17 10:42:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex [2022-10-17 10:42:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex [2022-10-17 10:42:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure log_access_ok [2022-10-17 10:42:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure log_access_ok [2022-10-17 10:42:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-10-17 10:42:00,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-10-17 10:42:00,086 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_alloc_fabric_acl [2022-10-17 10:42:00,087 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_alloc_fabric_acl [2022-10-17 10:42:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_tcm_vhost_mutex [2022-10-17 10:42:00,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_tcm_vhost_mutex [2022-10-17 10:42:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_ioctl [2022-10-17 10:42:00,087 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_ioctl [2022-10-17 10:42:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-10-17 10:42:00,088 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-10-17 10:42:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:42:00,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:42:00,088 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_drop_tport [2022-10-17 10:42:00,089 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_drop_tport [2022-10-17 10:42:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-10-17 10:42:00,089 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-10-17 10:42:00,089 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-10-17 10:42:00,089 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-10-17 10:42:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_free_iovecs [2022-10-17 10:42:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_free_iovecs [2022-10-17 10:42:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 10:42:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_work_flush [2022-10-17 10:42:00,093 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_work_flush [2022-10-17 10:42:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 10:42:00,094 INFO L130 BoogieDeclarations]: Found specification of procedure log_write [2022-10-17 10:42:00,096 INFO L138 BoogieDeclarations]: Found implementation of procedure log_write [2022-10-17 10:42:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-10-17 10:42:00,096 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-10-17 10:42:00,096 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_vq_reset [2022-10-17 10:42:00,103 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_vq_reset [2022-10-17 10:42:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2022-10-17 10:42:00,103 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2022-10-17 10:42:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure vq_log_access_ok [2022-10-17 10:42:00,103 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_log_access_ok [2022-10-17 10:42:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-10-17 10:42:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-10-17 10:42:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 10:42:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 10:42:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-10-17 10:42:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-10-17 10:42:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_queue [2022-10-17 10:42:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_queue [2022-10-17 10:42:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-10-17 10:42:00,105 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-10-17 10:42:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-10-17 10:42:00,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-10-17 10:42:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_fget [2022-10-17 10:42:00,105 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_fget [2022-10-17 10:42:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:42:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-10-17 10:42:00,106 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-10-17 10:42:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure vq_memory_access_ok [2022-10-17 10:42:00,106 INFO L138 BoogieDeclarations]: Found implementation of procedure vq_memory_access_ok [2022-10-17 10:42:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:42:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2022-10-17 10:42:00,106 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2022-10-17 10:42:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_release_cmd [2022-10-17 10:42:00,107 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_release_cmd [2022-10-17 10:42:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_set_default_node_attrs [2022-10-17 10:42:00,107 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_set_default_node_attrs [2022-10-17 10:42:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_drop_nexus [2022-10-17 10:42:00,107 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_drop_nexus [2022-10-17 10:42:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 10:42:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_dev_cleanup [2022-10-17 10:42:00,108 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_dev_cleanup [2022-10-17 10:42:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-10-17 10:42:00,108 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-10-17 10:42:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_tv_tpg_mutex [2022-10-17 10:42:00,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_tv_tpg_mutex [2022-10-17 10:42:00,108 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-10-17 10:42:00,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-10-17 10:42:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-10-17 10:42:00,109 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-10-17 10:42:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure sas_get_fabric_proto_ident [2022-10-17 10:42:00,109 INFO L138 BoogieDeclarations]: Found implementation of procedure sas_get_fabric_proto_ident [2022-10-17 10:42:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-10-17 10:42:00,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-10-17 10:42:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure get_user_pages_fast [2022-10-17 10:42:00,110 INFO L138 BoogieDeclarations]: Found implementation of procedure get_user_pages_fast [2022-10-17 10:42:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure transport_generic_free_cmd [2022-10-17 10:42:00,110 INFO L138 BoogieDeclarations]: Found implementation of procedure transport_generic_free_cmd [2022-10-17 10:42:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_deregister [2022-10-17 10:42:00,111 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_deregister [2022-10-17 10:42:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-10-17 10:42:00,111 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-10-17 10:42:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_lock [2022-10-17 10:42:00,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_lock [2022-10-17 10:42:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_command_size [2022-10-17 10:42:00,111 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_command_size [2022-10-17 10:42:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_dump_proto_id [2022-10-17 10:42:00,112 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_dump_proto_id [2022-10-17 10:42:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_ctx_fileget [2022-10-17 10:42:00,112 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_ctx_fileget [2022-10-17 10:42:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 10:42:00,112 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 10:42:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:42:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure __rcu_read_unlock [2022-10-17 10:42:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __rcu_read_unlock [2022-10-17 10:42:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_clear_endpoint [2022-10-17 10:42:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_clear_endpoint [2022-10-17 10:42:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure mmput [2022-10-17 10:42:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure mmput [2022-10-17 10:42:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-10-17 10:42:00,114 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-10-17 10:42:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 10:42:00,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 10:42:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_flush_vq [2022-10-17 10:42:00,114 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_flush_vq [2022-10-17 10:42:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure copy_user_generic [2022-10-17 10:42:00,114 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_user_generic [2022-10-17 10:42:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_cpu_idle [2022-10-17 10:42:00,115 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_cpu_idle [2022-10-17 10:42:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-10-17 10:42:00,115 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-10-17 10:42:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure sas_parse_pr_out_transport_id [2022-10-17 10:42:00,115 INFO L138 BoogieDeclarations]: Found implementation of procedure sas_parse_pr_out_transport_id [2022-10-17 10:42:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure eventfd_signal [2022-10-17 10:42:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure eventfd_signal [2022-10-17 10:42:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure utsname [2022-10-17 10:42:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure utsname [2022-10-17 10:42:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_stop [2022-10-17 10:42:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_stop [2022-10-17 10:42:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2022-10-17 10:42:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2022-10-17 10:42:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure memory_access_ok [2022-10-17 10:42:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure memory_access_ok [2022-10-17 10:42:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2022-10-17 10:42:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2022-10-17 10:42:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_add_used [2022-10-17 10:42:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_add_used [2022-10-17 10:42:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-10-17 10:42:00,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-10-17 10:42:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-10-17 10:42:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-10-17 10:42:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-10-17 10:42:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-10-17 10:42:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_drop_nodeacl [2022-10-17 10:42:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_drop_nodeacl [2022-10-17 10:42:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_poll_flush [2022-10-17 10:42:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_poll_flush [2022-10-17 10:42:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_scsi_release [2022-10-17 10:42:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_scsi_release [2022-10-17 10:42:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure vhost_signal [2022-10-17 10:42:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure vhost_signal [2022-10-17 10:42:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:42:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure sas_get_pr_transport_id_len [2022-10-17 10:42:00,120 INFO L138 BoogieDeclarations]: Found implementation of procedure sas_get_pr_transport_id_len [2022-10-17 10:42:00,124 INFO L130 BoogieDeclarations]: Found specification of procedure tcm_vhost_port_link [2022-10-17 10:42:00,124 INFO L138 BoogieDeclarations]: Found implementation of procedure tcm_vhost_port_link [2022-10-17 10:42:01,364 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:42:01,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7455: assume #t~switch210;#res := ~ret~1; [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7455: assume !#t~switch210;#t~switch210 := #t~switch210 || 4 == ~size; [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7488: assume 0 != ~tmp___1~4;#res := ~ret~1; [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7488: assume !(0 != ~tmp___1~4);#res := ~ret~1; [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7449: havoc #t~switch210; [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7474: SUMMARY for call #t~ret211 := ldv__builtin_expect((if 0 != ~ret~1 then 1 else 0), 0); srcloc: null [2022-10-17 10:42:07,492 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7470: assume #t~switch210; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7470: assume !#t~switch210;#t~switch210 := #t~switch210 || 16 == ~size; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7474-1: assume -9223372036854775808 <= #t~ret211 && #t~ret211 <= 9223372036854775807;~tmp___0~9 := #t~ret211;havoc #t~ret211; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##1: assume #t~switch210;#res := ~ret~1; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7497-1: ~tmp___2~3 := #t~ret213;havoc #t~ret213;#res := (if ~tmp___2~3 % 18446744073709551616 % 4294967296 <= 2147483647 then ~tmp___2~3 % 18446744073709551616 % 4294967296 else ~tmp___2~3 % 18446744073709551616 % 4294967296 - 4294967296); [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7497: SUMMARY for call #t~ret213 := copy_user_generic(~dst.base, ~dst.offset, ~src.base, ~src.offset, ~size); srcloc: null [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##2: assume !#t~switch210;#t~switch210 := #t~switch210 || 2 == ~size; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7460: assume #t~switch210;#res := ~ret~1; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7460: assume !#t~switch210;#t~switch210 := #t~switch210 || 8 == ~size; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7487-1: assume -9223372036854775808 <= #t~ret212 && #t~ret212 <= 9223372036854775807;~tmp___1~4 := #t~ret212;havoc #t~ret212; [2022-10-17 10:42:07,493 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7487: SUMMARY for call #t~ret212 := ldv__builtin_expect((if 0 != ~ret~1 then 1 else 0), 0); srcloc: null [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7483: assume #t~switch210; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7483: assume !#t~switch210;#t~switch210 := true; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7475: assume 0 != ~tmp___0~9;#res := ~ret~1; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7475: assume !(0 != ~tmp___0~9);#res := ~ret~1; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7496: assume #t~switch210; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7496: assume !#t~switch210; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7465: assume #t~switch210;#res := ~ret~1; [2022-10-17 10:42:07,494 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L7465: assume !#t~switch210;#t~switch210 := #t~switch210 || 10 == ~size; [2022-10-17 10:42:12,876 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:42:12,928 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:42:12,928 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:42:12,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:42:12 BoogieIcfgContainer [2022-10-17 10:42:12,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:42:12,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:42:12,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:42:12,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:42:12,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:41:54" (1/3) ... [2022-10-17 10:42:12,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9041f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:42:12, skipping insertion in model container [2022-10-17 10:42:12,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:41:59" (2/3) ... [2022-10-17 10:42:12,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9041f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:42:12, skipping insertion in model container [2022-10-17 10:42:12,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:42:12" (3/3) ... [2022-10-17 10:42:12,942 INFO L112 eAbstractionObserver]: Analyzing ICFG main0_drivers-vhost-tcm_vhost-ko--32_7a--linux-3.7.3.i [2022-10-17 10:42:12,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:42:12,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:42:13,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:42:13,074 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;@7a625899, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:42:13,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:42:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 2457 states, 1699 states have (on average 1.3507945850500294) internal successors, (2295), 1749 states have internal predecessors, (2295), 642 states have call successors, (642), 114 states have call predecessors, (642), 114 states have return successors, (642), 630 states have call predecessors, (642), 642 states have call successors, (642) [2022-10-17 10:42:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 10:42:13,095 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:13,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:13,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 450761681, now seen corresponding path program 1 times [2022-10-17 10:42:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060479198] [2022-10-17 10:42:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:13,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:13,721 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 10:42:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:13,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060479198] [2022-10-17 10:42:13,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060479198] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:13,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:13,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431128957] [2022-10-17 10:42:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:13,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:13,765 INFO L87 Difference]: Start difference. First operand has 2457 states, 1699 states have (on average 1.3507945850500294) internal successors, (2295), 1749 states have internal predecessors, (2295), 642 states have call successors, (642), 114 states have call predecessors, (642), 114 states have return successors, (642), 630 states have call predecessors, (642), 642 states have call successors, (642) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:14,125 INFO L93 Difference]: Finished difference Result 4893 states and 7240 transitions. [2022-10-17 10:42:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-10-17 10:42:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:14,161 INFO L225 Difference]: With dead ends: 4893 [2022-10-17 10:42:14,161 INFO L226 Difference]: Without dead ends: 2441 [2022-10-17 10:42:14,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:14,187 INFO L413 NwaCegarLoop]: 3555 mSDtfsCounter, 3546 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3555 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:14,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3555 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2022-10-17 10:42:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2441. [2022-10-17 10:42:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 1686 states have (on average 1.3422301304863582) internal successors, (2263), 1733 states have internal predecessors, (2263), 641 states have call successors, (641), 114 states have call predecessors, (641), 113 states have return successors, (630), 618 states have call predecessors, (630), 630 states have call successors, (630) [2022-10-17 10:42:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3534 transitions. [2022-10-17 10:42:14,464 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3534 transitions. Word has length 15 [2022-10-17 10:42:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:14,466 INFO L495 AbstractCegarLoop]: Abstraction has 2441 states and 3534 transitions. [2022-10-17 10:42:14,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3534 transitions. [2022-10-17 10:42:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:42:14,467 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:14,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:14,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:42:14,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1087560763, now seen corresponding path program 1 times [2022-10-17 10:42:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:14,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376078263] [2022-10-17 10:42:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:14,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:14,781 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 10:42:14,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:14,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376078263] [2022-10-17 10:42:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376078263] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:14,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:14,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851388500] [2022-10-17 10:42:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:14,790 INFO L87 Difference]: Start difference. First operand 2441 states and 3534 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:15,051 INFO L93 Difference]: Finished difference Result 2443 states and 3535 transitions. [2022-10-17 10:42:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-10-17 10:42:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:15,071 INFO L225 Difference]: With dead ends: 2443 [2022-10-17 10:42:15,071 INFO L226 Difference]: Without dead ends: 2440 [2022-10-17 10:42:15,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:15,078 INFO L413 NwaCegarLoop]: 3531 mSDtfsCounter, 3521 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:15,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3531 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-10-17 10:42:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2440. [2022-10-17 10:42:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 1686 states have (on average 1.3416370106761566) internal successors, (2262), 1732 states have internal predecessors, (2262), 640 states have call successors, (640), 114 states have call predecessors, (640), 113 states have return successors, (630), 618 states have call predecessors, (630), 630 states have call successors, (630) [2022-10-17 10:42:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3532 transitions. [2022-10-17 10:42:15,301 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3532 transitions. Word has length 16 [2022-10-17 10:42:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:15,302 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3532 transitions. [2022-10-17 10:42:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3532 transitions. [2022-10-17 10:42:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 10:42:15,304 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:15,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:15,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:42:15,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:15,315 INFO L85 PathProgramCache]: Analyzing trace with hash -646499308, now seen corresponding path program 1 times [2022-10-17 10:42:15,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:15,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588760497] [2022-10-17 10:42:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:15,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:15,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:15,641 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 10:42:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588760497] [2022-10-17 10:42:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588760497] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:15,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:15,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:15,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601629226] [2022-10-17 10:42:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:15,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:15,646 INFO L87 Difference]: Start difference. First operand 2440 states and 3532 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:15,850 INFO L93 Difference]: Finished difference Result 2442 states and 3533 transitions. [2022-10-17 10:42:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-17 10:42:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:15,870 INFO L225 Difference]: With dead ends: 2442 [2022-10-17 10:42:15,870 INFO L226 Difference]: Without dead ends: 2439 [2022-10-17 10:42:15,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:15,880 INFO L413 NwaCegarLoop]: 3529 mSDtfsCounter, 3518 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:15,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 3529 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-10-17 10:42:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2439. [2022-10-17 10:42:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 1686 states have (on average 1.341043890865955) internal successors, (2261), 1731 states have internal predecessors, (2261), 639 states have call successors, (639), 114 states have call predecessors, (639), 113 states have return successors, (630), 618 states have call predecessors, (630), 630 states have call successors, (630) [2022-10-17 10:42:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 3530 transitions. [2022-10-17 10:42:16,056 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 3530 transitions. Word has length 17 [2022-10-17 10:42:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:16,057 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 3530 transitions. [2022-10-17 10:42:16,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 3530 transitions. [2022-10-17 10:42:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:42:16,059 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:16,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:16,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:42:16,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1432218206, now seen corresponding path program 1 times [2022-10-17 10:42:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618441026] [2022-10-17 10:42:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:16,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:16,340 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 10:42:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618441026] [2022-10-17 10:42:16,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618441026] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:16,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:16,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:16,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100496343] [2022-10-17 10:42:16,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:16,342 INFO L87 Difference]: Start difference. First operand 2439 states and 3530 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:16,760 INFO L93 Difference]: Finished difference Result 5743 states and 8187 transitions. [2022-10-17 10:42:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-10-17 10:42:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:16,793 INFO L225 Difference]: With dead ends: 5743 [2022-10-17 10:42:16,793 INFO L226 Difference]: Without dead ends: 3343 [2022-10-17 10:42:16,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:16,811 INFO L413 NwaCegarLoop]: 3831 mSDtfsCounter, 1910 mSDsluCounter, 2776 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 6607 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:16,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 6607 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2022-10-17 10:42:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3336. [2022-10-17 10:42:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 2300 states have (on average 1.3169565217391304) internal successors, (3029), 2367 states have internal predecessors, (3029), 838 states have call successors, (838), 200 states have call predecessors, (838), 197 states have return successors, (832), 806 states have call predecessors, (832), 826 states have call successors, (832) [2022-10-17 10:42:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4699 transitions. [2022-10-17 10:42:17,073 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4699 transitions. Word has length 18 [2022-10-17 10:42:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:17,074 INFO L495 AbstractCegarLoop]: Abstraction has 3336 states and 4699 transitions. [2022-10-17 10:42:17,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4699 transitions. [2022-10-17 10:42:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:42:17,077 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:17,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:17,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:42:17,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1447956567, now seen corresponding path program 1 times [2022-10-17 10:42:17,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189406044] [2022-10-17 10:42:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:17,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:17,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:17,303 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 10:42:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:17,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189406044] [2022-10-17 10:42:17,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189406044] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:17,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:17,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490391913] [2022-10-17 10:42:17,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:17,306 INFO L87 Difference]: Start difference. First operand 3336 states and 4699 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:17,544 INFO L93 Difference]: Finished difference Result 3371 states and 4726 transitions. [2022-10-17 10:42:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:17,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-10-17 10:42:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:17,571 INFO L225 Difference]: With dead ends: 3371 [2022-10-17 10:42:17,572 INFO L226 Difference]: Without dead ends: 3367 [2022-10-17 10:42:17,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:17,575 INFO L413 NwaCegarLoop]: 3524 mSDtfsCounter, 3444 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:17,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3444 Valid, 3608 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2022-10-17 10:42:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 3363. [2022-10-17 10:42:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 2321 states have (on average 1.3136579060749678) internal successors, (3049), 2386 states have internal predecessors, (3049), 836 states have call successors, (836), 208 states have call predecessors, (836), 205 states have return successors, (832), 806 states have call predecessors, (832), 826 states have call successors, (832) [2022-10-17 10:42:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4717 transitions. [2022-10-17 10:42:17,881 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4717 transitions. Word has length 19 [2022-10-17 10:42:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:17,881 INFO L495 AbstractCegarLoop]: Abstraction has 3363 states and 4717 transitions. [2022-10-17 10:42:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4717 transitions. [2022-10-17 10:42:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:42:17,883 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:17,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:17,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:42:17,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:17,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1935850625, now seen corresponding path program 1 times [2022-10-17 10:42:17,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:17,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085142076] [2022-10-17 10:42:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:17,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:18,066 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 10:42:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085142076] [2022-10-17 10:42:18,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085142076] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:18,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:18,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:18,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932278758] [2022-10-17 10:42:18,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:18,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:18,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:18,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:18,068 INFO L87 Difference]: Start difference. First operand 3363 states and 4717 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:18,318 INFO L93 Difference]: Finished difference Result 3397 states and 4751 transitions. [2022-10-17 10:42:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-10-17 10:42:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:18,343 INFO L225 Difference]: With dead ends: 3397 [2022-10-17 10:42:18,344 INFO L226 Difference]: Without dead ends: 3373 [2022-10-17 10:42:18,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:18,348 INFO L413 NwaCegarLoop]: 3522 mSDtfsCounter, 3432 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:18,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3608 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2022-10-17 10:42:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3371. [2022-10-17 10:42:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 2329 states have (on average 1.3125805066552167) internal successors, (3057), 2392 states have internal predecessors, (3057), 830 states have call successors, (830), 214 states have call predecessors, (830), 211 states have return successors, (828), 802 states have call predecessors, (828), 822 states have call successors, (828) [2022-10-17 10:42:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 4715 transitions. [2022-10-17 10:42:18,660 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 4715 transitions. Word has length 20 [2022-10-17 10:42:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:18,661 INFO L495 AbstractCegarLoop]: Abstraction has 3371 states and 4715 transitions. [2022-10-17 10:42:18,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:42:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 4715 transitions. [2022-10-17 10:42:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 10:42:18,667 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:18,669 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:42:18,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:42:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1344205755, now seen corresponding path program 1 times [2022-10-17 10:42:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399140631] [2022-10-17 10:42:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:19,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:42:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:19,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:42:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-10-17 10:42:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-10-17 10:42:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:19,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399140631] [2022-10-17 10:42:19,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399140631] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:19,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:19,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:42:19,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397039701] [2022-10-17 10:42:19,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:19,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:42:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:42:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:42:19,162 INFO L87 Difference]: Start difference. First operand 3371 states and 4715 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:42:22,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []