./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc --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 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:45:51,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:45:51,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:45:51,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:45:51,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:45:51,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:45:51,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:45:51,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:45:51,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:45:51,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:45:51,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:45:51,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:45:51,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:45:51,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:45:51,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:45:51,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:45:51,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:45:51,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:45:51,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:45:51,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:45:51,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:45:51,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:45:51,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:45:51,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:45:51,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:45:51,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:45:51,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:45:51,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:45:51,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:45:51,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:45:51,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:45:51,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:45:51,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:45:51,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:45:51,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:45:51,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:45:51,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:45:51,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:45:51,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:45:51,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:45:51,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:45:51,318 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:45:51,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:45:51,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:45:51,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:45:51,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:45:51,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:45:51,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:45:51,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:45:51,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:45:51,347 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:45:51,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:45:51,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:45:51,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:45:51,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:45:51,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:45:51,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:45:51,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:45:51,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:45:51,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:45:51,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:45:51,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:45:51,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:45:51,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:45:51,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:45:51,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:45:51,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:45:51,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:45:51,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:45:51,353 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:45:51,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:45:51,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:45:51,353 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_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2022-11-02 20:45:51,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:45:51,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:45:51,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:45:51,689 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:45:51,690 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:45:51,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-11-02 20:45:51,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/data/bc3c51838/9eb2a0879bd047ae93022903b9513f84/FLAG5c1171cd5 [2022-11-02 20:45:52,721 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:45:52,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-11-02 20:45:52,767 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/data/bc3c51838/9eb2a0879bd047ae93022903b9513f84/FLAG5c1171cd5 [2022-11-02 20:45:53,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/data/bc3c51838/9eb2a0879bd047ae93022903b9513f84 [2022-11-02 20:45:53,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:45:53,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:45:53,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:45:53,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:45:53,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:45:53,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:53" (1/1) ... [2022-11-02 20:45:53,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@492fb2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:53, skipping insertion in model container [2022-11-02 20:45:53,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:53" (1/1) ... [2022-11-02 20:45:53,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:45:53,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:45:54,832 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-11-02 20:45:54,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:45:54,924 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:45:55,168 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-11-02 20:45:55,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:45:55,253 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:45:55,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55 WrapperNode [2022-11-02 20:45:55,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:45:55,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:45:55,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:45:55,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:45:55,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,476 INFO L138 Inliner]: procedures = 191, calls = 1267, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3340 [2022-11-02 20:45:55,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:45:55,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:45:55,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:45:55,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:45:55,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,729 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:45:55,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:45:55,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:45:55,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:45:55,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (1/1) ... [2022-11-02 20:45:55,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:45:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:55,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:45:55,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:45:55,863 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-11-02 20:45:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-11-02 20:45:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-02 20:45:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-02 20:45:55,864 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-02 20:45:55,864 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-02 20:45:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-02 20:45:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-02 20:45:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-02 20:45:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:45:55,865 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-11-02 20:45:55,866 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-11-02 20:45:55,866 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-11-02 20:45:55,866 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-11-02 20:45:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-02 20:45:55,867 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-02 20:45:55,867 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-11-02 20:45:55,868 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-11-02 20:45:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-11-02 20:45:55,868 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-11-02 20:45:55,868 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-02 20:45:55,868 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-02 20:45:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 20:45:55,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 20:45:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-11-02 20:45:55,869 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-11-02 20:45:55,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-11-02 20:45:55,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-11-02 20:45:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-11-02 20:45:55,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-11-02 20:45:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-11-02 20:45:55,870 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-11-02 20:45:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-11-02 20:45:55,870 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-11-02 20:45:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-11-02 20:45:55,871 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-11-02 20:45:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-11-02 20:45:55,871 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-11-02 20:45:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:45:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-02 20:45:55,872 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-02 20:45:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-02 20:45:55,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-02 20:45:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-11-02 20:45:55,873 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-11-02 20:45:55,873 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-11-02 20:45:55,873 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-11-02 20:45:55,873 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-11-02 20:45:55,873 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-11-02 20:45:55,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-02 20:45:55,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-02 20:45:55,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-02 20:45:55,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-02 20:45:55,874 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-11-02 20:45:55,874 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-11-02 20:45:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:45:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-11-02 20:45:55,877 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-11-02 20:45:55,877 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-11-02 20:45:55,877 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-11-02 20:45:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-02 20:45:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-02 20:45:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-11-02 20:45:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-11-02 20:45:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-02 20:45:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-02 20:45:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:45:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-11-02 20:45:55,880 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-11-02 20:45:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-11-02 20:45:55,881 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-11-02 20:45:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:45:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:45:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-02 20:45:55,882 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-02 20:45:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-02 20:45:55,883 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-11-02 20:45:55,883 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-11-02 20:45:55,883 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-11-02 20:45:55,883 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-11-02 20:45:55,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:45:55,884 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-11-02 20:45:55,884 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-11-02 20:45:55,884 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-11-02 20:45:55,884 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-11-02 20:45:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-11-02 20:45:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-11-02 20:45:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-02 20:45:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-02 20:45:55,885 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-02 20:45:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-02 20:45:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-02 20:45:55,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-02 20:45:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-02 20:45:55,887 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-02 20:45:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-02 20:45:55,888 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-02 20:45:55,888 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-02 20:45:55,889 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-02 20:45:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-11-02 20:45:55,890 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-11-02 20:45:55,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:45:55,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:45:55,890 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-11-02 20:45:55,890 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-11-02 20:45:55,891 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-02 20:45:55,891 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-02 20:45:55,891 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-11-02 20:45:55,891 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-11-02 20:45:55,891 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-02 20:45:55,891 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-02 20:45:55,892 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-11-02 20:45:55,892 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-11-02 20:45:55,892 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-02 20:45:55,892 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-02 20:45:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-02 20:45:55,893 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-02 20:45:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-02 20:45:55,894 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-02 20:45:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-02 20:45:55,897 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-02 20:45:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-11-02 20:45:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-11-02 20:45:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-11-02 20:45:55,899 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-11-02 20:45:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-02 20:45:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-02 20:45:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-02 20:45:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-02 20:45:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-11-02 20:45:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-11-02 20:45:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-02 20:45:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-02 20:45:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-11-02 20:45:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-11-02 20:45:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:45:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-02 20:45:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-02 20:45:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-02 20:45:55,904 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-02 20:45:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-02 20:45:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-02 20:45:55,904 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-02 20:45:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-02 20:45:55,904 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-02 20:45:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:45:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:45:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-02 20:45:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-02 20:45:56,592 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:45:56,597 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:46:14,475 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:46:14,506 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:46:14,522 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 20:46:14,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:46:14 BoogieIcfgContainer [2022-11-02 20:46:14,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:46:14,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:46:14,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:46:14,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:46:14,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:45:53" (1/3) ... [2022-11-02 20:46:14,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4ec9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:46:14, skipping insertion in model container [2022-11-02 20:46:14,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:55" (2/3) ... [2022-11-02 20:46:14,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4ec9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:46:14, skipping insertion in model container [2022-11-02 20:46:14,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:46:14" (3/3) ... [2022-11-02 20:46:14,547 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-11-02 20:46:14,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:46:14,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:46:14,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:46:14,678 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@186089c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:46:14,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:46:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-02 20:46:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:46:14,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:14,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:14,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1560528525, now seen corresponding path program 1 times [2022-11-02 20:46:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:14,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961948367] [2022-11-02 20:46:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:15,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:46:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:15,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:46:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:15,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:15,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961948367] [2022-11-02 20:46:15,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961948367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:15,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:15,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:46:15,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505593406] [2022-11-02 20:46:15,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:46:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:46:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:46:15,623 INFO L87 Difference]: Start difference. First operand has 1225 states, 841 states have (on average 1.375743162901308) internal successors, (1157), 881 states have internal predecessors, (1157), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:46:17,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:46:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:24,273 INFO L93 Difference]: Finished difference Result 3954 states and 5954 transitions. [2022-11-02 20:46:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:46:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-02 20:46:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:24,324 INFO L225 Difference]: With dead ends: 3954 [2022-11-02 20:46:24,324 INFO L226 Difference]: Without dead ends: 2729 [2022-11-02 20:46:24,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:46:24,342 INFO L413 NwaCegarLoop]: 2075 mSDtfsCounter, 2721 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 912 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3018 SdHoareTripleChecker+Valid, 4081 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:24,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3018 Valid, 4081 Invalid, 2275 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 1362 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-11-02 20:46:24,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2022-11-02 20:46:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2224. [2022-11-02 20:46:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1510 states have (on average 1.3543046357615893) internal successors, (2045), 1568 states have internal predecessors, (2045), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2022-11-02 20:46:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3222 transitions. [2022-11-02 20:46:24,590 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3222 transitions. Word has length 17 [2022-11-02 20:46:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:24,590 INFO L495 AbstractCegarLoop]: Abstraction has 2224 states and 3222 transitions. [2022-11-02 20:46:24,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:46:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3222 transitions. [2022-11-02 20:46:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:46:24,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:24,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:24,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:46:24,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1132781344, now seen corresponding path program 1 times [2022-11-02 20:46:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087936903] [2022-11-02 20:46:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:24,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:46:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:24,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:46:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:24,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087936903] [2022-11-02 20:46:24,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087936903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:24,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:24,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:46:24,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003362631] [2022-11-02 20:46:24,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:46:24,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:24,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:46:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:46:24,956 INFO L87 Difference]: Start difference. First operand 2224 states and 3222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:46:27,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:46:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:33,885 INFO L93 Difference]: Finished difference Result 6504 states and 9632 transitions. [2022-11-02 20:46:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:46:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-11-02 20:46:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:33,929 INFO L225 Difference]: With dead ends: 6504 [2022-11-02 20:46:33,930 INFO L226 Difference]: Without dead ends: 5418 [2022-11-02 20:46:33,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:46:33,941 INFO L413 NwaCegarLoop]: 2799 mSDtfsCounter, 2384 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 791 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2678 SdHoareTripleChecker+Valid, 5130 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:33,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2678 Valid, 5130 Invalid, 2182 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [791 Valid, 1390 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-02 20:46:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2022-11-02 20:46:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4408. [2022-11-02 20:46:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 2997 states have (on average 1.3546880213546881) internal successors, (4060), 3107 states have internal predecessors, (4060), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2022-11-02 20:46:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6390 transitions. [2022-11-02 20:46:34,286 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6390 transitions. Word has length 18 [2022-11-02 20:46:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:34,287 INFO L495 AbstractCegarLoop]: Abstraction has 4408 states and 6390 transitions. [2022-11-02 20:46:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:46:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6390 transitions. [2022-11-02 20:46:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:46:34,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:34,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:46:34,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1342676608, now seen corresponding path program 1 times [2022-11-02 20:46:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690412830] [2022-11-02 20:46:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:46:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:46:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:46:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:34,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:34,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690412830] [2022-11-02 20:46:34,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690412830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:34,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:34,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:46:34,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385719083] [2022-11-02 20:46:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:34,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:46:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:46:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:46:34,774 INFO L87 Difference]: Start difference. First operand 4408 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:46:36,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:46:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:43,580 INFO L93 Difference]: Finished difference Result 11851 states and 17589 transitions. [2022-11-02 20:46:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:46:43,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-11-02 20:46:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:43,671 INFO L225 Difference]: With dead ends: 11851 [2022-11-02 20:46:43,671 INFO L226 Difference]: Without dead ends: 10750 [2022-11-02 20:46:43,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:46:43,696 INFO L413 NwaCegarLoop]: 2258 mSDtfsCounter, 2626 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 902 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2919 SdHoareTripleChecker+Valid, 4158 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:43,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2919 Valid, 4158 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1384 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-11-02 20:46:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2022-11-02 20:46:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 7676. [2022-11-02 20:46:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 5224 states have (on average 1.354709035222052) internal successors, (7077), 5414 states have internal predecessors, (7077), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2022-11-02 20:46:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 11129 transitions. [2022-11-02 20:46:44,348 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 11129 transitions. Word has length 36 [2022-11-02 20:46:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:44,349 INFO L495 AbstractCegarLoop]: Abstraction has 7676 states and 11129 transitions. [2022-11-02 20:46:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:46:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 11129 transitions. [2022-11-02 20:46:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:46:44,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:44,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:44,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:46:44,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:46:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2327976, now seen corresponding path program 1 times [2022-11-02 20:46:44,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:44,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640318110] [2022-11-02 20:46:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:46,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:46:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:46:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:46:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:47,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:46:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:46:47,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:47,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640318110] [2022-11-02 20:46:47,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640318110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:47,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:46:47,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 20:46:47,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116757291] [2022-11-02 20:46:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:47,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:46:47,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:46:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:46:47,416 INFO L87 Difference]: Start difference. First operand 7676 states and 11129 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:46:49,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:47:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:25,535 INFO L93 Difference]: Finished difference Result 22061 states and 32715 transitions. [2022-11-02 20:47:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:47:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-02 20:47:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:25,649 INFO L225 Difference]: With dead ends: 22061 [2022-11-02 20:47:25,649 INFO L226 Difference]: Without dead ends: 16650 [2022-11-02 20:47:25,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:47:25,678 INFO L413 NwaCegarLoop]: 2611 mSDtfsCounter, 3303 mSDsluCounter, 19935 mSDsCounter, 0 mSdLazyCounter, 13416 mSolverCounterSat, 1476 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 22546 SdHoareTripleChecker+Invalid, 14893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 13416 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:25,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3602 Valid, 22546 Invalid, 14893 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1476 Valid, 13416 Invalid, 1 Unknown, 0 Unchecked, 35.9s Time] [2022-11-02 20:47:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16650 states. [2022-11-02 20:47:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16650 to 10978. [2022-11-02 20:47:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10978 states, 7469 states have (on average 1.3542642924086223) internal successors, (10115), 7739 states have internal predecessors, (10115), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2022-11-02 20:47:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10978 states to 10978 states and 15913 transitions. [2022-11-02 20:47:26,513 INFO L78 Accepts]: Start accepts. Automaton has 10978 states and 15913 transitions. Word has length 38 [2022-11-02 20:47:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:26,514 INFO L495 AbstractCegarLoop]: Abstraction has 10978 states and 15913 transitions. [2022-11-02 20:47:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:47:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 10978 states and 15913 transitions. [2022-11-02 20:47:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:47:26,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:26,520 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:47:26,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:47:26,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1064452566, now seen corresponding path program 1 times [2022-11-02 20:47:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:26,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617290145] [2022-11-02 20:47:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:47:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:47:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:47:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:47:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:47:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:47:29,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617290145] [2022-11-02 20:47:29,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617290145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:29,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:29,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-02 20:47:29,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422373388] [2022-11-02 20:47:29,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:29,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:47:29,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:29,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:47:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:47:29,965 INFO L87 Difference]: Start difference. First operand 10978 states and 15913 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-02 20:47:32,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:48:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:14,212 INFO L93 Difference]: Finished difference Result 17437 states and 25948 transitions. [2022-11-02 20:48:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:48:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2022-11-02 20:48:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:14,315 INFO L225 Difference]: With dead ends: 17437 [2022-11-02 20:48:14,315 INFO L226 Difference]: Without dead ends: 16373 [2022-11-02 20:48:14,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:48:14,330 INFO L413 NwaCegarLoop]: 2297 mSDtfsCounter, 3981 mSDsluCounter, 18237 mSDsCounter, 0 mSdLazyCounter, 14863 mSolverCounterSat, 1829 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4266 SdHoareTripleChecker+Valid, 20534 SdHoareTripleChecker+Invalid, 16693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1829 IncrementalHoareTripleChecker+Valid, 14863 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:14,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4266 Valid, 20534 Invalid, 16693 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1829 Valid, 14863 Invalid, 1 Unknown, 0 Unchecked, 41.2s Time] [2022-11-02 20:48:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16373 states. [2022-11-02 20:48:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16373 to 9922. [2022-11-02 20:48:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 6754 states have (on average 1.3532721350310928) internal successors, (9140), 6998 states have internal predecessors, (9140), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2022-11-02 20:48:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14368 transitions. [2022-11-02 20:48:15,540 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14368 transitions. Word has length 45 [2022-11-02 20:48:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:15,543 INFO L495 AbstractCegarLoop]: Abstraction has 9922 states and 14368 transitions. [2022-11-02 20:48:15,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-02 20:48:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14368 transitions. [2022-11-02 20:48:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:48:15,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:15,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:15,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:48:15,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash 575821089, now seen corresponding path program 1 times [2022-11-02 20:48:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122800445] [2022-11-02 20:48:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:15,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:15,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:15,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:48:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:16,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:48:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:16,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:16,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:48:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:16,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:48:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:16,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:16,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122800445] [2022-11-02 20:48:16,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122800445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:16,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:48:16,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:48:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977650191] [2022-11-02 20:48:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:16,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:48:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:48:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:48:16,050 INFO L87 Difference]: Start difference. First operand 9922 states and 14368 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:48:18,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:48:20,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:48:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:25,949 INFO L93 Difference]: Finished difference Result 14804 states and 22011 transitions. [2022-11-02 20:48:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:48:25,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-11-02 20:48:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:26,041 INFO L225 Difference]: With dead ends: 14804 [2022-11-02 20:48:26,042 INFO L226 Difference]: Without dead ends: 14783 [2022-11-02 20:48:26,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:48:26,135 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 2019 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 669 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2304 SdHoareTripleChecker+Valid, 5720 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:26,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2304 Valid, 5720 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 1403 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-11-02 20:48:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14783 states. [2022-11-02 20:48:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14783 to 7766. [2022-11-02 20:48:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7766 states, 5290 states have (on average 1.3506616257088846) internal successors, (7145), 5482 states have internal predecessors, (7145), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-11-02 20:48:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 11227 transitions. [2022-11-02 20:48:27,004 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 11227 transitions. Word has length 52 [2022-11-02 20:48:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:27,004 INFO L495 AbstractCegarLoop]: Abstraction has 7766 states and 11227 transitions. [2022-11-02 20:48:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:48:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 11227 transitions. [2022-11-02 20:48:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:48:27,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:27,006 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:48:27,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1749749551, now seen corresponding path program 1 times [2022-11-02 20:48:27,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:27,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944828704] [2022-11-02 20:48:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:27,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:28,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:48:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:29,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:48:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:29,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:48:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:29,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:29,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:48:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:29,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 20:48:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:48:29,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:29,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944828704] [2022-11-02 20:48:29,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944828704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:29,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283740563] [2022-11-02 20:48:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:29,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:29,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:29,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:29,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:48:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-02 20:48:34,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:35,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:48:35,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283740563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:35,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:48:35,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 14 [2022-11-02 20:48:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714174354] [2022-11-02 20:48:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:35,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:48:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:48:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:48:35,285 INFO L87 Difference]: Start difference. First operand 7766 states and 11227 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:48:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:36,866 INFO L93 Difference]: Finished difference Result 9905 states and 14340 transitions. [2022-11-02 20:48:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:48:36,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-11-02 20:48:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:36,889 INFO L225 Difference]: With dead ends: 9905 [2022-11-02 20:48:36,889 INFO L226 Difference]: Without dead ends: 5552 [2022-11-02 20:48:36,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:48:36,904 INFO L413 NwaCegarLoop]: 1637 mSDtfsCounter, 263 mSDsluCounter, 7791 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 9428 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:36,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 9428 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:48:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2022-11-02 20:48:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5544. [2022-11-02 20:48:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 3773 states have (on average 1.3501192684866155) internal successors, (5094), 3908 states have internal predecessors, (5094), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2022-11-02 20:48:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 8014 transitions. [2022-11-02 20:48:37,821 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 8014 transitions. Word has length 53 [2022-11-02 20:48:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:37,822 INFO L495 AbstractCegarLoop]: Abstraction has 5544 states and 8014 transitions. [2022-11-02 20:48:37,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:48:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 8014 transitions. [2022-11-02 20:48:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:48:37,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:37,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:37,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:38,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26d057e4-b5bc-403a-bf90-8bd8d71f2706/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:48:38,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1357667059, now seen corresponding path program 1 times [2022-11-02 20:48:38,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:38,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048167831] [2022-11-02 20:48:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:38,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:48:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:48:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:48:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:48:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:48:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:48:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 20:48:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:48:38,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:38,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048167831] [2022-11-02 20:48:38,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048167831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:38,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:48:38,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:48:38,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135607872] [2022-11-02 20:48:38,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:38,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:48:38,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:48:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:48:38,643 INFO L87 Difference]: Start difference. First operand 5544 states and 8014 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:48:40,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:48:42,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:49:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:03,379 INFO L93 Difference]: Finished difference Result 8917 states and 13364 transitions. [2022-11-02 20:49:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:49:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-11-02 20:49:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:03,419 INFO L225 Difference]: With dead ends: 8917 [2022-11-02 20:49:03,420 INFO L226 Difference]: Without dead ends: 7833 [2022-11-02 20:49:03,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:49:03,427 INFO L413 NwaCegarLoop]: 2294 mSDtfsCounter, 3107 mSDsluCounter, 4064 mSDsCounter, 0 mSdLazyCounter, 7538 mSolverCounterSat, 1734 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 6358 SdHoareTripleChecker+Invalid, 9274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1734 IncrementalHoareTripleChecker+Valid, 7538 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:03,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 6358 Invalid, 9274 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1734 Valid, 7538 Invalid, 2 Unknown, 0 Unchecked, 23.4s Time] [2022-11-02 20:49:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2022-11-02 20:49:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5533. [2022-11-02 20:49:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 3767 states have (on average 1.349880541544996) internal successors, (5085), 3900 states have internal predecessors, (5085), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-11-02 20:49:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 7996 transitions. [2022-11-02 20:49:04,267 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 7996 transitions. Word has length 64 [2022-11-02 20:49:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:04,267 INFO L495 AbstractCegarLoop]: Abstraction has 5533 states and 7996 transitions. [2022-11-02 20:49:04,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:49:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 7996 transitions. [2022-11-02 20:49:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:49:04,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:04,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:04,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:49:04,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash -723478224, now seen corresponding path program 1 times [2022-11-02 20:49:04,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:04,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121793923] [2022-11-02 20:49:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:04,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:49:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:49:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:49:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 20:49:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:49:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121793923] [2022-11-02 20:49:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121793923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:04,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:04,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:49:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589894872] [2022-11-02 20:49:04,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:04,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:49:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:49:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:04,920 INFO L87 Difference]: Start difference. First operand 5533 states and 7996 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:49:06,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:49:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:16,698 INFO L93 Difference]: Finished difference Result 8180 states and 12119 transitions. [2022-11-02 20:49:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:49:16,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2022-11-02 20:49:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:16,723 INFO L225 Difference]: With dead ends: 8180 [2022-11-02 20:49:16,723 INFO L226 Difference]: Without dead ends: 4916 [2022-11-02 20:49:16,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:16,736 INFO L413 NwaCegarLoop]: 2169 mSDtfsCounter, 1604 mSDsluCounter, 6294 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 941 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 8463 SdHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:16,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 8463 Invalid, 4434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 3492 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2022-11-02 20:49:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2022-11-02 20:49:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 3391. [2022-11-02 20:49:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 2314 states have (on average 1.3414001728608471) internal successors, (3104), 2393 states have internal predecessors, (3104), 881 states have call successors, (881), 198 states have call predecessors, (881), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2022-11-02 20:49:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4864 transitions. [2022-11-02 20:49:17,353 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4864 transitions. Word has length 63 [2022-11-02 20:49:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:17,353 INFO L495 AbstractCegarLoop]: Abstraction has 3391 states and 4864 transitions. [2022-11-02 20:49:17,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:49:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4864 transitions. [2022-11-02 20:49:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:49:17,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:17,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:17,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:49:17,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1127472847, now seen corresponding path program 1 times [2022-11-02 20:49:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:17,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828344715] [2022-11-02 20:49:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:49:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:49:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:49:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-02 20:49:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:49:17,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:17,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828344715] [2022-11-02 20:49:17,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828344715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:17,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:17,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:17,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340828425] [2022-11-02 20:49:17,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:17,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:49:17,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:17,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:49:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:17,922 INFO L87 Difference]: Start difference. First operand 3391 states and 4864 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:49:19,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []