./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y --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 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:31:59,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:31:59,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:31:59,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:31:59,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:31:59,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:31:59,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:31:59,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:31:59,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:31:59,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:31:59,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:31:59,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:31:59,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:31:59,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:31:59,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:31:59,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:31:59,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:31:59,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:31:59,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:31:59,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:31:59,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:31:59,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:31:59,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:31:59,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:31:59,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:31:59,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:31:59,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:31:59,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:31:59,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:31:59,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:31:59,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:31:59,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:31:59,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:31:59,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:31:59,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:31:59,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:31:59,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:31:59,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:31:59,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:31:59,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:31:59,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:31:59,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 17:31:59,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:31:59,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:31:59,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:31:59,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:31:59,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:31:59,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:31:59,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:31:59,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:31:59,465 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:31:59,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:31:59,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:31:59,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:31:59,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:31:59,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:31:59,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:31:59,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:31:59,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:31:59,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:31:59,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:31:59,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:31:59,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:31:59,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:31:59,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:31:59,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:31:59,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:31:59,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:31:59,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:31:59,469 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:31:59,469 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:31:59,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:31:59,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:31:59,469 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_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 [2021-11-13 17:31:59,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:31:59,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:31:59,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:31:59,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:31:59,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:31:59,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2021-11-13 17:31:59,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/data/68d77123e/f66a1ffdc1e94f27bc504b4d26ffe4b7/FLAG843c2b4cc [2021-11-13 17:32:00,599 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:32:00,600 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2021-11-13 17:32:00,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/data/68d77123e/f66a1ffdc1e94f27bc504b4d26ffe4b7/FLAG843c2b4cc [2021-11-13 17:32:01,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/data/68d77123e/f66a1ffdc1e94f27bc504b4d26ffe4b7 [2021-11-13 17:32:01,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:32:01,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:32:01,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:32:01,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:32:01,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:32:01,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:32:01" (1/1) ... [2021-11-13 17:32:01,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abb328d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:01, skipping insertion in model container [2021-11-13 17:32:01,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:32:01" (1/1) ... [2021-11-13 17:32:01,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:32:01,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:32:01,755 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2021-11-13 17:32:01,756 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2021-11-13 17:32:02,103 WARN L228 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_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2021-11-13 17:32:03,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:32:03,073 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:32:03,174 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2021-11-13 17:32:03,176 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2021-11-13 17:32:03,194 WARN L228 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_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2021-11-13 17:32:03,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:32:03,529 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:32:03,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03 WrapperNode [2021-11-13 17:32:03,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:32:03,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:32:03,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:32:03,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:32:03,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:03,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:03,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:32:03,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:32:03,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:32:03,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:32:03,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:03,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:03,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:03,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:04,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:04,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:04,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:04,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:32:04,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:32:04,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:32:04,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:32:04,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (1/1) ... [2021-11-13 17:32:04,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:32:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:04,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:32:04,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:32:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-13 17:32:04,246 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-13 17:32:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-13 17:32:04,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-13 17:32:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-13 17:32:04,247 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-13 17:32:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 17:32:04,247 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 17:32:04,248 INFO L130 BoogieDeclarations]: Found specification of procedure free_sglist [2021-11-13 17:32:04,248 INFO L138 BoogieDeclarations]: Found implementation of procedure free_sglist [2021-11-13 17:32:04,248 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2021-11-13 17:32:04,248 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2021-11-13 17:32:04,248 INFO L130 BoogieDeclarations]: Found specification of procedure test_iso_queue [2021-11-13 17:32:04,248 INFO L138 BoogieDeclarations]: Found implementation of procedure test_iso_queue [2021-11-13 17:32:04,249 INFO L130 BoogieDeclarations]: Found specification of procedure simple_check_buf [2021-11-13 17:32:04,249 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_check_buf [2021-11-13 17:32:04,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 17:32:04,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 17:32:04,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:32:04,249 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-13 17:32:04,250 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-13 17:32:04,250 INFO L130 BoogieDeclarations]: Found specification of procedure perform_sglist [2021-11-13 17:32:04,250 INFO L138 BoogieDeclarations]: Found implementation of procedure perform_sglist [2021-11-13 17:32:04,250 INFO L130 BoogieDeclarations]: Found specification of procedure test_unaligned_bulk [2021-11-13 17:32:04,250 INFO L138 BoogieDeclarations]: Found implementation of procedure test_unaligned_bulk [2021-11-13 17:32:04,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-13 17:32:04,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-13 17:32:04,251 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_sglist [2021-11-13 17:32:04,251 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_sglist [2021-11-13 17:32:04,251 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 17:32:04,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 17:32:04,252 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 17:32:04,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 17:32:04,252 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-13 17:32:04,252 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-13 17:32:04,252 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 17:32:04,252 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 17:32:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-13 17:32:04,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-13 17:32:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 17:32:04,253 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 17:32:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure set_altsetting [2021-11-13 17:32:04,254 INFO L138 BoogieDeclarations]: Found implementation of procedure set_altsetting [2021-11-13 17:32:04,254 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2021-11-13 17:32:04,254 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2021-11-13 17:32:04,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:32:04,254 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 17:32:04,254 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 17:32:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-13 17:32:04,255 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-13 17:32:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 17:32:04,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 17:32:04,255 INFO L130 BoogieDeclarations]: Found specification of procedure verify_not_halted [2021-11-13 17:32:04,256 INFO L138 BoogieDeclarations]: Found implementation of procedure verify_not_halted [2021-11-13 17:32:04,257 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-13 17:32:04,257 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-13 17:32:04,258 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-13 17:32:04,258 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-13 17:32:04,258 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 17:32:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 17:32:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 17:32:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 17:32:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2021-11-13 17:32:04,259 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2021-11-13 17:32:04,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 17:32:04,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 17:32:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure test_halt [2021-11-13 17:32:04,260 INFO L138 BoogieDeclarations]: Found implementation of procedure test_halt [2021-11-13 17:32:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_alloc_urb [2021-11-13 17:32:04,260 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_alloc_urb [2021-11-13 17:32:04,260 INFO L130 BoogieDeclarations]: Found specification of procedure unlink1 [2021-11-13 17:32:04,261 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink1 [2021-11-13 17:32:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:32:04,261 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_out [2021-11-13 17:32:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_out [2021-11-13 17:32:04,262 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 17:32:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 17:32:04,262 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2021-11-13 17:32:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2021-11-13 17:32:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_status [2021-11-13 17:32:04,263 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_status [2021-11-13 17:32:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure is_good_config [2021-11-13 17:32:04,263 INFO L138 BoogieDeclarations]: Found implementation of procedure is_good_config [2021-11-13 17:32:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-13 17:32:04,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-13 17:32:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-13 17:32:04,264 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-13 17:32:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:32:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:32:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2021-11-13 17:32:04,265 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2021-11-13 17:32:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-13 17:32:04,265 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-13 17:32:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 17:32:04,266 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 17:32:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure testdev_to_usbdev [2021-11-13 17:32:04,267 INFO L138 BoogieDeclarations]: Found implementation of procedure testdev_to_usbdev [2021-11-13 17:32:04,267 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-13 17:32:04,268 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-13 17:32:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:32:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_simple [2021-11-13 17:32:04,268 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_simple [2021-11-13 17:32:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 17:32:04,268 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 17:32:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-13 17:32:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-13 17:32:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-13 17:32:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-13 17:32:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-13 17:32:04,270 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-13 17:32:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure simple_io [2021-11-13 17:32:04,270 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_io [2021-11-13 17:32:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:32:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 17:32:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure simple_alloc_urb [2021-11-13 17:32:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_alloc_urb [2021-11-13 17:32:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure simple_free_urb [2021-11-13 17:32:04,274 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_free_urb [2021-11-13 17:32:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure simple_fill_buf [2021-11-13 17:32:04,275 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_fill_buf [2021-11-13 17:32:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure do_gettimeofday [2021-11-13 17:32:04,277 INFO L138 BoogieDeclarations]: Found implementation of procedure do_gettimeofday [2021-11-13 17:32:04,278 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 17:32:04,278 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 17:32:04,278 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 17:32:04,285 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 17:32:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_ioctl [2021-11-13 17:32:04,285 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_ioctl [2021-11-13 17:32:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_offset [2021-11-13 17:32:04,285 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_offset [2021-11-13 17:32:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-13 17:32:04,286 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-13 17:32:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:32:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-13 17:32:04,286 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-13 17:32:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_disconnect [2021-11-13 17:32:04,286 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_disconnect [2021-11-13 17:32:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure check_guard_bytes [2021-11-13 17:32:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure check_guard_bytes [2021-11-13 17:32:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-13 17:32:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-13 17:32:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-13 17:32:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-13 17:32:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 17:32:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 17:32:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:32:04,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:32:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_descriptor [2021-11-13 17:32:04,288 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_descriptor [2021-11-13 17:32:05,894 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 17:32:14,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:32:14,791 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 17:32:14,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:32:14 BoogieIcfgContainer [2021-11-13 17:32:14,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:32:14,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:32:14,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:32:14,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:32:14,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:32:01" (1/3) ... [2021-11-13 17:32:14,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8407be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:32:14, skipping insertion in model container [2021-11-13 17:32:14,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:32:03" (2/3) ... [2021-11-13 17:32:14,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8407be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:32:14, skipping insertion in model container [2021-11-13 17:32:14,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:32:14" (3/3) ... [2021-11-13 17:32:14,808 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2021-11-13 17:32:14,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:32:14,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:32:14,886 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:32:14,893 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:32:14,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:32:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 1325 states, 999 states have (on average 1.4214214214214214) internal successors, (1420), 1014 states have internal predecessors, (1420), 256 states have call successors, (256), 69 states have call predecessors, (256), 68 states have return successors, (253), 250 states have call predecessors, (253), 253 states have call successors, (253) [2021-11-13 17:32:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:32:14,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:14,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:14,969 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash 810260350, now seen corresponding path program 1 times [2021-11-13 17:32:14,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:14,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906648155] [2021-11-13 17:32:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:14,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:15,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:15,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:15,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:15,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 17:32:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:32:15,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:15,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906648155] [2021-11-13 17:32:15,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906648155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:15,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:15,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:32:15,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605456141] [2021-11-13 17:32:15,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:15,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:32:15,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:32:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:32:15,870 INFO L87 Difference]: Start difference. First operand has 1325 states, 999 states have (on average 1.4214214214214214) internal successors, (1420), 1014 states have internal predecessors, (1420), 256 states have call successors, (256), 69 states have call predecessors, (256), 68 states have return successors, (253), 250 states have call predecessors, (253), 253 states have call successors, (253) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:32:17,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:32:20,067 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:32:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:26,111 INFO L93 Difference]: Finished difference Result 2997 states and 4536 transitions. [2021-11-13 17:32:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:32:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-13 17:32:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:26,148 INFO L225 Difference]: With dead ends: 2997 [2021-11-13 17:32:26,149 INFO L226 Difference]: Without dead ends: 1640 [2021-11-13 17:32:26,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:32:26,173 INFO L933 BasicCegarLoop]: 1710 mSDtfsCounter, 1245 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 776 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8855.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 4672 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 71.55ms SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9804.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:26,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 4672 Invalid, 2709 Unknown, 0 Unchecked, 71.55ms Time], IncrementalHoareTripleChecker [776 Valid, 1931 Invalid, 2 Unknown, 0 Unchecked, 9804.59ms Time] [2021-11-13 17:32:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-13 17:32:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1338. [2021-11-13 17:32:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1011 states have (on average 1.4124629080118694) internal successors, (1428), 1022 states have internal predecessors, (1428), 255 states have call successors, (255), 72 states have call predecessors, (255), 71 states have return successors, (254), 250 states have call predecessors, (254), 254 states have call successors, (254) [2021-11-13 17:32:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1937 transitions. [2021-11-13 17:32:26,415 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1937 transitions. Word has length 39 [2021-11-13 17:32:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 1937 transitions. [2021-11-13 17:32:26,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:32:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1937 transitions. [2021-11-13 17:32:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 17:32:26,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:26,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:26,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:32:26,426 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1447521310, now seen corresponding path program 1 times [2021-11-13 17:32:26,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:26,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559715721] [2021-11-13 17:32:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:26,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:26,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:26,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:26,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:26,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:32:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 17:32:26,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:26,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559715721] [2021-11-13 17:32:26,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559715721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:26,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:26,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:32:26,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234603206] [2021-11-13 17:32:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:26,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:32:26,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:32:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:32:26,924 INFO L87 Difference]: Start difference. First operand 1338 states and 1937 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:32:28,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:32:31,121 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:32:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:36,369 INFO L93 Difference]: Finished difference Result 1672 states and 2482 transitions. [2021-11-13 17:32:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:32:36,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2021-11-13 17:32:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:36,384 INFO L225 Difference]: With dead ends: 1672 [2021-11-13 17:32:36,384 INFO L226 Difference]: Without dead ends: 1669 [2021-11-13 17:32:36,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:36,387 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 2931 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 1172 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8415.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3071 SdHoareTripleChecker+Valid, 3205 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.74ms SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9182.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:36,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3071 Valid, 3205 Invalid, 2609 Unknown, 0 Unchecked, 44.74ms Time], IncrementalHoareTripleChecker [1172 Valid, 1435 Invalid, 2 Unknown, 0 Unchecked, 9182.57ms Time] [2021-11-13 17:32:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-11-13 17:32:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1368. [2021-11-13 17:32:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1030 states have (on average 1.4058252427184466) internal successors, (1448), 1041 states have internal predecessors, (1448), 259 states have call successors, (259), 79 states have call predecessors, (259), 78 states have return successors, (258), 254 states have call predecessors, (258), 258 states have call successors, (258) [2021-11-13 17:32:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1965 transitions. [2021-11-13 17:32:36,469 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1965 transitions. Word has length 60 [2021-11-13 17:32:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:36,469 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1965 transitions. [2021-11-13 17:32:36,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:32:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1965 transitions. [2021-11-13 17:32:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 17:32:36,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:36,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:36,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:32:36,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2145409867, now seen corresponding path program 1 times [2021-11-13 17:32:36,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:36,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343818416] [2021-11-13 17:32:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:36,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 17:32:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-13 17:32:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:32:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 17:32:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 17:32:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 17:32:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 17:32:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:36,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 17:32:36,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:36,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343818416] [2021-11-13 17:32:36,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:36,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066259601] [2021-11-13 17:32:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:36,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:36,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:36,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:36,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:32:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2594 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:32:38,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:38,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066259601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:38,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:38,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:32:38,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329394081] [2021-11-13 17:32:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:38,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:38,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:38,334 INFO L87 Difference]: Start difference. First operand 1368 states and 1965 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 17:32:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:38,482 INFO L93 Difference]: Finished difference Result 2713 states and 3907 transitions. [2021-11-13 17:32:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 160 [2021-11-13 17:32:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:38,497 INFO L225 Difference]: With dead ends: 2713 [2021-11-13 17:32:38,498 INFO L226 Difference]: Without dead ends: 1369 [2021-11-13 17:32:38,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:38,514 INFO L933 BasicCegarLoop]: 1896 mSDtfsCounter, 0 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:38,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3787 Invalid, 6 Unknown, 0 Unchecked, 10.17ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 11.00ms Time] [2021-11-13 17:32:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-11-13 17:32:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1369. [2021-11-13 17:32:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1031 states have (on average 1.405431619786615) internal successors, (1449), 1042 states have internal predecessors, (1449), 259 states have call successors, (259), 79 states have call predecessors, (259), 78 states have return successors, (258), 254 states have call predecessors, (258), 258 states have call successors, (258) [2021-11-13 17:32:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1966 transitions. [2021-11-13 17:32:38,592 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1966 transitions. Word has length 160 [2021-11-13 17:32:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:38,594 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1966 transitions. [2021-11-13 17:32:38,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 17:32:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1966 transitions. [2021-11-13 17:32:38,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 17:32:38,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:38,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:38,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:38,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:38,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1584710089, now seen corresponding path program 1 times [2021-11-13 17:32:38,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:38,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965142153] [2021-11-13 17:32:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:38,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 17:32:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-13 17:32:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:32:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 17:32:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 17:32:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 17:32:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 17:32:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:39,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 17:32:39,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:39,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965142153] [2021-11-13 17:32:39,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:39,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973481693] [2021-11-13 17:32:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:39,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:39,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:39,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:39,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:32:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 17:32:40,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:40,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973481693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:40,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:40,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:32:40,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14461667] [2021-11-13 17:32:40,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:40,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:40,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:40,750 INFO L87 Difference]: Start difference. First operand 1369 states and 1966 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-13 17:32:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:40,945 INFO L93 Difference]: Finished difference Result 2805 states and 4014 transitions. [2021-11-13 17:32:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2021-11-13 17:32:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:40,958 INFO L225 Difference]: With dead ends: 2805 [2021-11-13 17:32:40,958 INFO L226 Difference]: Without dead ends: 1460 [2021-11-13 17:32:40,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:40,967 INFO L933 BasicCegarLoop]: 1912 mSDtfsCounter, 281 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.18ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.28ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:40,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 3584 Invalid, 45 Unknown, 0 Unchecked, 7.18ms Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 110.28ms Time] [2021-11-13 17:32:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-13 17:32:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1451. [2021-11-13 17:32:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1095 states have (on average 1.3954337899543379) internal successors, (1528), 1106 states have internal predecessors, (1528), 265 states have call successors, (265), 91 states have call predecessors, (265), 90 states have return successors, (264), 260 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-13 17:32:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2057 transitions. [2021-11-13 17:32:41,039 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2057 transitions. Word has length 160 [2021-11-13 17:32:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:41,040 INFO L470 AbstractCegarLoop]: Abstraction has 1451 states and 2057 transitions. [2021-11-13 17:32:41,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-13 17:32:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2057 transitions. [2021-11-13 17:32:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-13 17:32:41,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:41,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:41,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:41,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:41,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1238919696, now seen corresponding path program 1 times [2021-11-13 17:32:41,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:41,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950048783] [2021-11-13 17:32:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:41,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:32:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 17:32:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-13 17:32:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:32:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 17:32:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 17:32:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 17:32:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-13 17:32:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:41,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 17:32:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:41,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950048783] [2021-11-13 17:32:41,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:41,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265447611] [2021-11-13 17:32:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:41,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:41,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:41,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:41,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:32:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:42,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:32:43,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:43,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265447611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:43,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:43,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:32:43,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505159853] [2021-11-13 17:32:43,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:43,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:43,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:43,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:32:43,124 INFO L87 Difference]: Start difference. First operand 1451 states and 2057 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:32:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:43,366 INFO L93 Difference]: Finished difference Result 4069 states and 5793 transitions. [2021-11-13 17:32:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 174 [2021-11-13 17:32:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:43,387 INFO L225 Difference]: With dead ends: 4069 [2021-11-13 17:32:43,387 INFO L226 Difference]: Without dead ends: 2642 [2021-11-13 17:32:43,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:32:43,396 INFO L933 BasicCegarLoop]: 2106 mSDtfsCounter, 1866 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.84ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.74ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:43,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1866 Valid, 3772 Invalid, 46 Unknown, 0 Unchecked, 9.84ms Time], IncrementalHoareTripleChecker [17 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 116.74ms Time] [2021-11-13 17:32:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-11-13 17:32:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2635. [2021-11-13 17:32:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1980 states have (on average 1.3984848484848484) internal successors, (2769), 2002 states have internal predecessors, (2769), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2021-11-13 17:32:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3752 transitions. [2021-11-13 17:32:43,581 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3752 transitions. Word has length 174 [2021-11-13 17:32:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:43,581 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 3752 transitions. [2021-11-13 17:32:43,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:32:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3752 transitions. [2021-11-13 17:32:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-13 17:32:43,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:43,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:43,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:43,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:43,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash -420530186, now seen corresponding path program 1 times [2021-11-13 17:32:43,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:43,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016037179] [2021-11-13 17:32:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:43,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:32:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 17:32:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:32:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 17:32:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 17:32:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-13 17:32:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 17:32:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 17:32:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:44,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-13 17:32:44,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:44,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016037179] [2021-11-13 17:32:44,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:44,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032925623] [2021-11-13 17:32:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:44,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:44,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:44,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:44,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:32:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:45,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:32:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:32:45,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:45,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032925623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:45,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:45,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:32:45,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385334132] [2021-11-13 17:32:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:45,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:32:45,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:32:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:45,542 INFO L87 Difference]: Start difference. First operand 2635 states and 3752 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:32:47,594 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:32:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:48,014 INFO L93 Difference]: Finished difference Result 5474 states and 7787 transitions. [2021-11-13 17:32:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:32:48,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2021-11-13 17:32:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:48,038 INFO L225 Difference]: With dead ends: 5474 [2021-11-13 17:32:48,038 INFO L226 Difference]: Without dead ends: 2863 [2021-11-13 17:32:48,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:32:48,051 INFO L933 BasicCegarLoop]: 2179 mSDtfsCounter, 343 mSDsluCounter, 4003 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2100.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 6182 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.30ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2294.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:48,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 6182 Invalid, 27 Unknown, 0 Unchecked, 11.30ms Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 1 Unknown, 0 Unchecked, 2294.15ms Time] [2021-11-13 17:32:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-11-13 17:32:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2637. [2021-11-13 17:32:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 1982 states have (on average 1.398082744702321) internal successors, (2771), 2004 states have internal predecessors, (2771), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2021-11-13 17:32:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3754 transitions. [2021-11-13 17:32:48,189 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3754 transitions. Word has length 175 [2021-11-13 17:32:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:48,190 INFO L470 AbstractCegarLoop]: Abstraction has 2637 states and 3754 transitions. [2021-11-13 17:32:48,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:32:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3754 transitions. [2021-11-13 17:32:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 17:32:48,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:48,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:48,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:48,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 17:32:48,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1537263626, now seen corresponding path program 1 times [2021-11-13 17:32:48,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:48,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005810137] [2021-11-13 17:32:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:48,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:32:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 17:32:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 17:32:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 17:32:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 17:32:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 17:32:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 17:32:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-13 17:32:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-13 17:32:48,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:48,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005810137] [2021-11-13 17:32:48,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:48,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586579678] [2021-11-13 17:32:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:48,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:48,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:48,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:48,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:32:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:49,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:32:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:32:50,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:50,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586579678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:50,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:50,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:32:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576864474] [2021-11-13 17:32:50,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:32:50,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:32:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:50,285 INFO L87 Difference]: Start difference. First operand 2637 states and 3754 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 17:32:52,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:32:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:52,689 INFO L93 Difference]: Finished difference Result 5479 states and 7792 transitions. [2021-11-13 17:32:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:32:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 185 [2021-11-13 17:32:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:52,711 INFO L225 Difference]: With dead ends: 5479 [2021-11-13 17:32:52,711 INFO L226 Difference]: Without dead ends: 2866 [2021-11-13 17:32:52,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:32:52,723 INFO L933 BasicCegarLoop]: 2179 mSDtfsCounter, 343 mSDsluCounter, 4003 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2066.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 6182 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.07ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2274.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:52,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 6182 Invalid, 25 Unknown, 0 Unchecked, 11.07ms Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2274.99ms Time] [2021-11-13 17:32:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-11-13 17:32:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2637. [2021-11-13 17:32:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 1982 states have (on average 1.398082744702321) internal successors, (2771), 2004 states have internal predecessors, (2771), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2021-11-13 17:32:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3754 transitions. [2021-11-13 17:32:52,856 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3754 transitions. Word has length 185 [2021-11-13 17:32:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:52,856 INFO L470 AbstractCegarLoop]: Abstraction has 2637 states and 3754 transitions. [2021-11-13 17:32:52,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 17:32:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3754 transitions. [2021-11-13 17:32:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 17:32:52,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:52,872 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:52,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:53,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:53,100 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1551735590, now seen corresponding path program 1 times [2021-11-13 17:32:53,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:53,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737883047] [2021-11-13 17:32:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:53,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:32:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 17:32:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:32:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:32:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 17:32:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 17:32:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 17:32:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:32:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 17:32:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 17:32:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-13 17:32:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 17:32:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:53,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:53,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737883047] [2021-11-13 17:32:53,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:53,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901931931] [2021-11-13 17:32:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:53,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:53,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:53,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:32:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:54,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 17:32:55,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:55,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901931931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:55,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:55,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:32:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060107364] [2021-11-13 17:32:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:55,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:55,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:55,090 INFO L87 Difference]: Start difference. First operand 2637 states and 3754 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 17:32:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:55,213 INFO L93 Difference]: Finished difference Result 5251 states and 7483 transitions. [2021-11-13 17:32:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 228 [2021-11-13 17:32:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:55,233 INFO L225 Difference]: With dead ends: 5251 [2021-11-13 17:32:55,233 INFO L226 Difference]: Without dead ends: 2638 [2021-11-13 17:32:55,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:55,245 INFO L933 BasicCegarLoop]: 1896 mSDtfsCounter, 0 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:55,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3787 Invalid, 6 Unknown, 0 Unchecked, 6.54ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 22.35ms Time] [2021-11-13 17:32:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-11-13 17:32:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2638. [2021-11-13 17:32:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 1983 states have (on average 1.3978819969742813) internal successors, (2772), 2005 states have internal predecessors, (2772), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2021-11-13 17:32:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3755 transitions. [2021-11-13 17:32:55,376 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3755 transitions. Word has length 228 [2021-11-13 17:32:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:55,376 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 3755 transitions. [2021-11-13 17:32:55,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 17:32:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3755 transitions. [2021-11-13 17:32:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 17:32:55,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:55,391 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:55,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:55,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:55,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash 607348504, now seen corresponding path program 1 times [2021-11-13 17:32:55,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:55,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056404742] [2021-11-13 17:32:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:55,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:32:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:32:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 17:32:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:32:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:32:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 17:32:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:32:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:32:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 17:32:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 17:32:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 17:32:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:32:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 17:32:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:32:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 17:32:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-11-13 17:32:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 17:32:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:56,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:56,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056404742] [2021-11-13 17:32:56,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-13 17:32:56,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683442174] [2021-11-13 17:32:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:56,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:56,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:56,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:32:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2937 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:32:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 17:32:57,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:57,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683442174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:57,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:57,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:32:57,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578881222] [2021-11-13 17:32:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:57,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:32:57,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:32:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:32:57,907 INFO L87 Difference]: Start difference. First operand 2638 states and 3755 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 17:32:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:58,063 INFO L93 Difference]: Finished difference Result 5252 states and 7483 transitions. [2021-11-13 17:32:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:32:58,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 228 [2021-11-13 17:32:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:58,083 INFO L225 Difference]: With dead ends: 5252 [2021-11-13 17:32:58,083 INFO L226 Difference]: Without dead ends: 2638 [2021-11-13 17:32:58,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:32:58,096 INFO L933 BasicCegarLoop]: 1892 mSDtfsCounter, 1814 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.36ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:58,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1814 Valid, 3781 Invalid, 11 Unknown, 0 Unchecked, 8.57ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 24.36ms Time] [2021-11-13 17:32:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2021-11-13 17:32:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2638. [2021-11-13 17:32:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 1983 states have (on average 1.3973777105395866) internal successors, (2771), 2005 states have internal predecessors, (2771), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2021-11-13 17:32:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3754 transitions. [2021-11-13 17:32:58,247 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3754 transitions. Word has length 228 [2021-11-13 17:32:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:58,248 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 3754 transitions. [2021-11-13 17:32:58,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 17:32:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3754 transitions. [2021-11-13 17:32:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 17:32:58,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:58,264 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:58,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:58,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 17:32:58,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1025237206, now seen corresponding path program 1 times [2021-11-13 17:32:58,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:58,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232380842] [2021-11-13 17:32:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:58,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:58,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:32:58,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286724691] [2021-11-13 17:32:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:58,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:58,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:58,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:32:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 2940 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 17:32:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:33:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 17:33:00,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:33:00,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:33:00,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232380842] [2021-11-13 17:33:00,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:33:00,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286724691] [2021-11-13 17:33:00,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286724691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:33:00,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:33:00,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:33:00,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489026916] [2021-11-13 17:33:00,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:33:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:33:00,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:33:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:33:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:33:00,100 INFO L87 Difference]: Start difference. First operand 2638 states and 3754 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 17:33:02,141 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:33:02,687 INFO L93 Difference]: Finished difference Result 5699 states and 8128 transitions. [2021-11-13 17:33:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:33:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 228 [2021-11-13 17:33:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:33:02,711 INFO L225 Difference]: With dead ends: 5699 [2021-11-13 17:33:02,711 INFO L226 Difference]: Without dead ends: 3085 [2021-11-13 17:33:02,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:33:02,722 INFO L933 BasicCegarLoop]: 2209 mSDtfsCounter, 686 mSDsluCounter, 8531 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2181.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 10740 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.71ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2379.20ms IncrementalHoareTripleChecker+Time [2021-11-13 17:33:02,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 10740 Invalid, 128 Unknown, 0 Unchecked, 16.71ms Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 1 Unknown, 0 Unchecked, 2379.20ms Time] [2021-11-13 17:33:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2021-11-13 17:33:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2644. [2021-11-13 17:33:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 1987 states have (on average 1.3965777554101662) internal successors, (2775), 2009 states have internal predecessors, (2775), 494 states have call successors, (494), 163 states have call predecessors, (494), 162 states have return successors, (493), 485 states have call predecessors, (493), 493 states have call successors, (493) [2021-11-13 17:33:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3762 transitions. [2021-11-13 17:33:02,873 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3762 transitions. Word has length 228 [2021-11-13 17:33:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:33:02,874 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 3762 transitions. [2021-11-13 17:33:02,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-13 17:33:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3762 transitions. [2021-11-13 17:33:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-13 17:33:02,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:33:02,888 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:33:02,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:33:03,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:33:03,108 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:33:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:33:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash 651738589, now seen corresponding path program 1 times [2021-11-13 17:33:03,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:33:03,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043429894] [2021-11-13 17:33:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:33:03,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:33:03,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:33:03,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130926093] [2021-11-13 17:33:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:33:03,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:33:03,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:33:03,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:33:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:33:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:33:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2974 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 17:33:04,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:33:04,962 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-13 17:33:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-11-13 17:33:05,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-13 17:33:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 17:33:05,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:33:09,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:33:09,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043429894] [2021-11-13 17:33:09,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:33:09,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130926093] [2021-11-13 17:33:09,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130926093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:33:09,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:33:09,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-13 17:33:09,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966431948] [2021-11-13 17:33:09,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:33:09,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:33:09,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:33:09,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:33:09,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:33:09,777 INFO L87 Difference]: Start difference. First operand 2644 states and 3762 transitions. Second operand has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 13 states have internal predecessors, (151), 8 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-13 17:33:11,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:15,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:33:21,153 INFO L93 Difference]: Finished difference Result 6697 states and 9803 transitions. [2021-11-13 17:33:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:33:21,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 13 states have internal predecessors, (151), 8 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 232 [2021-11-13 17:33:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:33:21,204 INFO L225 Difference]: With dead ends: 6697 [2021-11-13 17:33:21,205 INFO L226 Difference]: Without dead ends: 4077 [2021-11-13 17:33:21,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-11-13 17:33:21,217 INFO L933 BasicCegarLoop]: 1965 mSDtfsCounter, 2291 mSDsluCounter, 22585 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 411 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9736.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 24550 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.96ms SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 10796.45ms IncrementalHoareTripleChecker+Time [2021-11-13 17:33:21,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 24550 Invalid, 2726 Unknown, 0 Unchecked, 56.96ms Time], IncrementalHoareTripleChecker [411 Valid, 1745 Invalid, 2 Unknown, 568 Unchecked, 10796.45ms Time] [2021-11-13 17:33:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2021-11-13 17:33:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 3891. [2021-11-13 17:33:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 2980 states have (on average 1.4375838926174496) internal successors, (4284), 3016 states have internal predecessors, (4284), 741 states have call successors, (741), 169 states have call predecessors, (741), 169 states have return successors, (744), 725 states have call predecessors, (744), 740 states have call successors, (744) [2021-11-13 17:33:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5769 transitions. [2021-11-13 17:33:21,554 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 5769 transitions. Word has length 232 [2021-11-13 17:33:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:33:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 5769 transitions. [2021-11-13 17:33:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 13 states have internal predecessors, (151), 8 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-13 17:33:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 5769 transitions. [2021-11-13 17:33:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-13 17:33:21,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:33:21,576 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:33:21,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:33:21,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 17:33:21,791 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:33:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:33:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1744589070, now seen corresponding path program 1 times [2021-11-13 17:33:21,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:33:21,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782626425] [2021-11-13 17:33:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:33:21,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:33:21,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:33:21,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842029841] [2021-11-13 17:33:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:33:21,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:33:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:33:21,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:33:21,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:33:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:33:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 3011 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 17:33:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:33:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 17:33:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:33:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 17:33:27,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-13 17:33:27,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 6 [2021-11-13 17:33:28,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:33:28,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 17:33:30,283 WARN L860 $PredicateComparison]: unable to prove that (exists ((|usb_set_intfdata_dev_set_drvdata_~dev#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base| (let ((.cse0 (+ 489 |usb_set_intfdata_dev_set_drvdata_~dev#1.offset|))) (store (select |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base|) .cse0 (select (select |c_#memory_int| |c_usb_set_intfdata_#in~intf#1.base|) .cse0)))))) is different from true [2021-11-13 17:33:30,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:33:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 17:33:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 17:33:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 17:33:31,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:33:33,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:33:33,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782626425] [2021-11-13 17:33:33,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:33:33,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842029841] [2021-11-13 17:33:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842029841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:33:33,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:33:33,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-13 17:33:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394526538] [2021-11-13 17:33:33,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:33:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 17:33:33,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:33:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 17:33:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=4, NotChecked=42, Total=552 [2021-11-13 17:33:33,726 INFO L87 Difference]: Start difference. First operand 3891 states and 5769 transitions. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 18 states have internal predecessors, (169), 9 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2021-11-13 17:33:35,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:37,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:40,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:42,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:44,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:46,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:48,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:33:51,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:12,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:14,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:16,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:18,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:25,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:27,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:30,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:34:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:34:34,321 INFO L93 Difference]: Finished difference Result 8207 states and 12260 transitions. [2021-11-13 17:34:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 17:34:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 18 states have internal predecessors, (169), 9 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 239 [2021-11-13 17:34:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:34:34,355 INFO L225 Difference]: With dead ends: 8207 [2021-11-13 17:34:34,355 INFO L226 Difference]: Without dead ends: 5587 [2021-11-13 17:34:34,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 286 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=172, Invalid=1230, Unknown=8, NotChecked=72, Total=1482 [2021-11-13 17:34:34,367 INFO L933 BasicCegarLoop]: 2501 mSDtfsCounter, 1525 mSDsluCounter, 22296 mSDsCounter, 0 mSdLazyCounter, 9385 mSolverCounterSat, 397 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45187.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 24797 SdHoareTripleChecker+Invalid, 17100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 111.90ms SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 9385 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 7303 IncrementalHoareTripleChecker+Unchecked, 49605.03ms IncrementalHoareTripleChecker+Time [2021-11-13 17:34:34,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 24797 Invalid, 17100 Unknown, 0 Unchecked, 111.90ms Time], IncrementalHoareTripleChecker [397 Valid, 9385 Invalid, 15 Unknown, 7303 Unchecked, 49605.03ms Time] [2021-11-13 17:34:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2021-11-13 17:34:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 4736. [2021-11-13 17:34:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4736 states, 3663 states have (on average 1.4482664482664482) internal successors, (5305), 3715 states have internal predecessors, (5305), 874 states have call successors, (874), 192 states have call predecessors, (874), 198 states have return successors, (939), 850 states have call predecessors, (939), 873 states have call successors, (939) [2021-11-13 17:34:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 7118 transitions. [2021-11-13 17:34:34,641 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 7118 transitions. Word has length 239 [2021-11-13 17:34:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:34:34,642 INFO L470 AbstractCegarLoop]: Abstraction has 4736 states and 7118 transitions. [2021-11-13 17:34:34,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 18 states have internal predecessors, (169), 9 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2021-11-13 17:34:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 7118 transitions. [2021-11-13 17:34:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 17:34:34,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:34:34,670 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:34:34,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:34:34,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:34,896 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:34:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:34:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1617722553, now seen corresponding path program 1 times [2021-11-13 17:34:34,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:34:34,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493894168] [2021-11-13 17:34:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:34,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:34:35,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:34:35,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788110689] [2021-11-13 17:34:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:34:35,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:34:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:34:35,022 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:34:35,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:34:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:34:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 3017 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-13 17:34:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:34:36,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-13 17:34:44,382 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_#Ultimate.C_memset_#t~loopctr1295_5| Int) (|#Ultimate.C_memset_#value| Int) (|#Ultimate.C_memset_#ptr.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) (+ |v_#Ultimate.C_memset_#t~loopctr1295_5| |#Ultimate.C_memset_#ptr.offset|) |#Ultimate.C_memset_#value|)))) is different from true [2021-11-13 17:34:44,419 INFO L354 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2021-11-13 17:34:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2021-11-13 17:34:44,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-13 17:35:11,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:35:11,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 17:35:11,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-13 17:35:11,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 6 [2021-11-13 17:35:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:35:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 17:35:19,739 WARN L860 $PredicateComparison]: unable to prove that (exists ((|usb_set_intfdata_dev_set_drvdata_~dev#1.offset| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base| (let ((.cse0 (+ 489 |usb_set_intfdata_dev_set_drvdata_~dev#1.offset|))) (store (select |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base|) .cse0 (select (select |c_#memory_int| |c_usb_set_intfdata_#in~intf#1.base|) .cse0)))))) is different from true [2021-11-13 17:35:19,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-13 17:35:19,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 17:35:50,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 17:35:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 1 not checked. [2021-11-13 17:35:50,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:55,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:55,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493894168] [2021-11-13 17:35:55,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:35:55,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788110689] [2021-11-13 17:35:55,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788110689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:55,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:35:55,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-13 17:35:55,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566172001] [2021-11-13 17:35:55,256 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 17:35:55,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 17:35:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=555, Unknown=20, NotChecked=98, Total=756 [2021-11-13 17:35:55,258 INFO L87 Difference]: Start difference. First operand 4736 states and 7118 transitions. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 22 states have internal predecessors, (170), 10 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) [2021-11-13 17:35:57,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:35:59,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:01,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:03,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:06,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:08,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:10,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:12,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:36:14,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:37:01,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:37:19,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:37:23,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:37:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:25,475 INFO L93 Difference]: Finished difference Result 9822 states and 14778 transitions. [2021-11-13 17:37:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 17:37:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 22 states have internal predecessors, (170), 10 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) Word has length 240 [2021-11-13 17:37:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:25,519 INFO L225 Difference]: With dead ends: 9822 [2021-11-13 17:37:25,519 INFO L226 Difference]: Without dead ends: 7166 [2021-11-13 17:37:25,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 284 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=196, Invalid=1577, Unknown=41, NotChecked=166, Total=1980 [2021-11-13 17:37:25,534 INFO L933 BasicCegarLoop]: 2515 mSDtfsCounter, 1664 mSDsluCounter, 21733 mSDsCounter, 0 mSdLazyCounter, 9433 mSolverCounterSat, 372 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38881.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 24248 SdHoareTripleChecker+Invalid, 18872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 94.48ms SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 9433 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 9056 IncrementalHoareTripleChecker+Unchecked, 42940.28ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:25,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 24248 Invalid, 18872 Unknown, 0 Unchecked, 94.48ms Time], IncrementalHoareTripleChecker [372 Valid, 9433 Invalid, 11 Unknown, 9056 Unchecked, 42940.28ms Time] [2021-11-13 17:37:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7166 states. [2021-11-13 17:37:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7166 to 5457. [2021-11-13 17:37:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5457 states, 4280 states have (on average 1.4532710280373833) internal successors, (6220), 4337 states have internal predecessors, (6220), 950 states have call successors, (950), 213 states have call predecessors, (950), 226 states have return successors, (1045), 929 states have call predecessors, (1045), 949 states have call successors, (1045) [2021-11-13 17:37:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5457 states to 5457 states and 8215 transitions. [2021-11-13 17:37:25,870 INFO L78 Accepts]: Start accepts. Automaton has 5457 states and 8215 transitions. Word has length 240 [2021-11-13 17:37:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:25,873 INFO L470 AbstractCegarLoop]: Abstraction has 5457 states and 8215 transitions. [2021-11-13 17:37:25,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 22 states have internal predecessors, (170), 10 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) [2021-11-13 17:37:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5457 states and 8215 transitions. [2021-11-13 17:37:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-13 17:37:25,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:25,917 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:25,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:37:26,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 17:37:26,142 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:37:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1524799534, now seen corresponding path program 2 times [2021-11-13 17:37:26,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:26,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471712585] [2021-11-13 17:37:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:26,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:26,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:37:26,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587779824] [2021-11-13 17:37:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:37:26,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:26,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:26,300 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:26,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0eb9b9-0c33-401a-ad32-4d957d0a2e88/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process