./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:15:36,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:15:36,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:15:36,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:15:36,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:15:36,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:15:36,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:15:36,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:15:36,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:15:36,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:15:36,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:15:36,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:15:36,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:15:36,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:15:36,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:15:36,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:15:36,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:15:36,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:15:36,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:15:36,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:15:36,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:15:36,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:15:36,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:15:36,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:15:36,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:15:36,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:15:36,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:15:36,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:15:36,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:15:36,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:15:36,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:15:36,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:15:36,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:15:36,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:15:36,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:15:36,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:15:36,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:15:36,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:15:36,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:15:36,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:15:36,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:15:36,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:15:36,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:15:36,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:15:36,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:15:36,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:15:36,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:15:36,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:15:36,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:15:36,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:15:36,596 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:15:36,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:15:36,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:15:36,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:15:36,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:15:36,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:15:36,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:15:36,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:15:36,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:15:36,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:15:36,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:15:36,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:15:36,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:15:36,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:15:36,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:15:36,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:15:36,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:15:36,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:15:36,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:15:36,600 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:15:36,601 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:15:36,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:15:36,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:15:36,601 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_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 213c19133f8e1eb8e04c1430c89bd3923e29e833639b74dc68815899bbf3f9fa [2021-11-13 18:15:36,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:15:36,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:15:36,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:15:36,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:15:36,917 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:15:36,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-13 18:15:37,032 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/data/0c5ffe335/483c1ef3fbcc4b06bc30078a79f6e8c4/FLAGf2ffb021d [2021-11-13 18:15:38,204 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:15:38,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-13 18:15:38,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/data/0c5ffe335/483c1ef3fbcc4b06bc30078a79f6e8c4/FLAGf2ffb021d [2021-11-13 18:15:38,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/data/0c5ffe335/483c1ef3fbcc4b06bc30078a79f6e8c4 [2021-11-13 18:15:38,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:15:38,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:15:38,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:15:38,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:15:38,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:15:38,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:15:38" (1/1) ... [2021-11-13 18:15:38,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7124edfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:38, skipping insertion in model container [2021-11-13 18:15:38,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:15:38" (1/1) ... [2021-11-13 18:15:38,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:15:38,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:15:43,694 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i[553894,553907] [2021-11-13 18:15:44,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:15:44,257 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:15:45,915 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i[553894,553907] [2021-11-13 18:15:45,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:15:46,236 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:15:46,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46 WrapperNode [2021-11-13 18:15:46,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:15:46,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:15:46,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:15:46,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:15:46,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:46,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:47,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:15:47,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:15:47,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:15:47,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:15:47,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:47,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:47,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:47,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:48,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:48,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:48,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:48,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:15:48,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:15:48,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:15:48,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:15:48,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (1/1) ... [2021-11-13 18:15:48,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:15:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:15:48,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:15:48,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:15:48,674 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 18:15:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 18:15:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_write_regs [2021-11-13 18:15:48,676 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_write_regs [2021-11-13 18:15:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_capture_area_set [2021-11-13 18:15:48,677 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_capture_area_set [2021-11-13 18:15:48,677 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_alloc_urbs [2021-11-13 18:15:48,677 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_alloc_urbs [2021-11-13 18:15:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-11-13 18:15:48,678 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-11-13 18:15:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_mmap [2021-11-13 18:15:48,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:15:48,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:15:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_stop_streaming [2021-11-13 18:15:48,679 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_stop_streaming [2021-11-13 18:15:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_device_unregister [2021-11-13 18:15:48,679 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_device_unregister [2021-11-13 18:15:48,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-13 18:15:48,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-13 18:15:48,680 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-13 18:15:48,681 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-13 18:15:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure res_free [2021-11-13 18:15:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure res_free [2021-11-13 18:15:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:15:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:15:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_write_ac97 [2021-11-13 18:15:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_write_ac97 [2021-11-13 18:15:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_em28xx [2021-11-13 18:15:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_em28xx [2021-11-13 18:15:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_handler_free [2021-11-13 18:15:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_handler_free [2021-11-13 18:15:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-13 18:15:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-13 18:15:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2021-11-13 18:15:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2021-11-13 18:15:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_g_frequency [2021-11-13 18:15:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_g_frequency [2021-11-13 18:15:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:15:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:15:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_g_register [2021-11-13 18:15:48,686 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_g_register [2021-11-13 18:15:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure video_devdata [2021-11-13 18:15:48,687 INFO L138 BoogieDeclarations]: Found implementation of procedure video_devdata [2021-11-13 18:15:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:15:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_vbi_supported [2021-11-13 18:15:48,687 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_vbi_supported [2021-11-13 18:15:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-13 18:15:48,688 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-13 18:15:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:15:48,688 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:15:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_copy_video [2021-11-13 18:15:48,689 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_copy_video [2021-11-13 18:15:48,689 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_gpio_set [2021-11-13 18:15:48,690 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_gpio_set [2021-11-13 18:15:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_g_chip_ident [2021-11-13 18:15:48,690 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_g_chip_ident [2021-11-13 18:15:48,690 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~v4l2_std_id~0~TO~int [2021-11-13 18:15:48,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~v4l2_std_id~0~TO~int [2021-11-13 18:15:48,692 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_try_fmt_vid_cap [2021-11-13 18:15:48,692 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_try_fmt_vid_cap [2021-11-13 18:15:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_read_reg_req [2021-11-13 18:15:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_read_reg_req [2021-11-13 18:15:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 18:15:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_ctrl_urb_lock_of_em28xx [2021-11-13 18:15:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_ctrl_urb_lock_of_em28xx [2021-11-13 18:15:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-13 18:15:48,694 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-13 18:15:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_buffer_done [2021-11-13 18:15:48,695 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_buffer_done [2021-11-13 18:15:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:15:48,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:15:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_ctrl_urb_lock_of_em28xx [2021-11-13 18:15:48,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_ctrl_urb_lock_of_em28xx [2021-11-13 18:15:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 18:15:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~~u32~0~X~~u32~0~TO~int [2021-11-13 18:15:48,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~~u32~0~X~~u32~0~TO~int [2021-11-13 18:15:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-11-13 18:15:48,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-11-13 18:15:48,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:15:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_i2c_unregister [2021-11-13 18:15:48,698 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_i2c_unregister [2021-11-13 18:15:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:15:48,698 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:15:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:15:48,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:15:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_write_reg [2021-11-13 18:15:48,699 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_write_reg [2021-11-13 18:15:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-13 18:15:48,699 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-13 18:15:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure video_is_registered [2021-11-13 18:15:48,700 INFO L138 BoogieDeclarations]: Found implementation of procedure video_is_registered [2021-11-13 18:15:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_subscribe_event [2021-11-13 18:15:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure video_unregister_device [2021-11-13 18:15:48,701 INFO L138 BoogieDeclarations]: Found implementation of procedure video_unregister_device [2021-11-13 18:15:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:15:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure video_mux [2021-11-13 18:15:48,702 INFO L138 BoogieDeclarations]: Found implementation of procedure video_mux [2021-11-13 18:15:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:15:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 18:15:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_audio_analog_set [2021-11-13 18:15:48,703 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_audio_analog_set [2021-11-13 18:15:48,704 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-13 18:15:48,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-13 18:15:48,705 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 18:15:48,705 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 18:15:48,705 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_prepare [2021-11-13 18:15:48,705 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_prepare [2021-11-13 18:15:48,706 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_start_analog_streaming [2021-11-13 18:15:48,706 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_start_analog_streaming [2021-11-13 18:15:48,706 INFO L130 BoogieDeclarations]: Found specification of procedure format_by_fourcc [2021-11-13 18:15:48,706 INFO L138 BoogieDeclarations]: Found implementation of procedure format_by_fourcc [2021-11-13 18:15:48,706 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_read_reg [2021-11-13 18:15:48,706 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_read_reg [2021-11-13 18:15:48,707 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_reg_len [2021-11-13 18:15:48,707 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_reg_len [2021-11-13 18:15:48,707 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-13 18:15:48,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-13 18:15:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_event_unsubscribe [2021-11-13 18:15:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure get_ressource [2021-11-13 18:15:48,709 INFO L138 BoogieDeclarations]: Found implementation of procedure get_ressource [2021-11-13 18:15:48,712 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_save_flags [2021-11-13 18:15:48,712 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_save_flags [2021-11-13 18:15:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_set_outfmt [2021-11-13 18:15:48,713 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_set_outfmt [2021-11-13 18:15:48,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:15:48,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:15:48,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-13 18:15:48,715 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-13 18:15:48,715 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-13 18:15:48,721 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-13 18:15:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_set_plane_payload [2021-11-13 18:15:48,722 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_set_plane_payload [2021-11-13 18:15:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_fop_poll [2021-11-13 18:15:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2021-11-13 18:15:48,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2021-11-13 18:15:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:15:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:15:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-13 18:15:48,723 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-13 18:15:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_v4l2_close [2021-11-13 18:15:48,724 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_v4l2_close [2021-11-13 18:15:48,724 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_read_reg_req_len [2021-11-13 18:15:48,724 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_read_reg_req_len [2021-11-13 18:15:48,724 INFO L130 BoogieDeclarations]: Found specification of procedure video_device_release [2021-11-13 18:15:48,724 INFO L138 BoogieDeclarations]: Found implementation of procedure video_device_release [2021-11-13 18:15:48,724 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_write_reg_bits [2021-11-13 18:15:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_write_reg_bits [2021-11-13 18:15:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:15:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:15:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:15:48,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:15:48,725 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-13 18:15:48,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-13 18:15:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_s_ctrl [2021-11-13 18:15:48,726 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_s_ctrl [2021-11-13 18:15:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:15:48,726 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:15:48,726 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_s_frequency [2021-11-13 18:15:48,727 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_s_frequency [2021-11-13 18:15:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure vbi_buffer_prepare [2021-11-13 18:15:48,727 INFO L138 BoogieDeclarations]: Found implementation of procedure vbi_buffer_prepare [2021-11-13 18:15:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_release_resources [2021-11-13 18:15:48,727 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_release_resources [2021-11-13 18:15:48,727 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-13 18:15:48,728 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-13 18:15:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure video_drvdata [2021-11-13 18:15:48,728 INFO L138 BoogieDeclarations]: Found implementation of procedure video_drvdata [2021-11-13 18:15:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_em28xx [2021-11-13 18:15:48,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_em28xx [2021-11-13 18:15:48,728 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_write_regs_req [2021-11-13 18:15:48,729 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_write_regs_req [2021-11-13 18:15:48,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:15:48,729 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2021-11-13 18:15:48,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2021-11-13 18:15:48,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:15:48,729 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_g_chip_info [2021-11-13 18:15:48,730 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_g_chip_info [2021-11-13 18:15:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_set_video_format [2021-11-13 18:15:48,730 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_set_video_format [2021-11-13 18:15:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:15:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_set_mode [2021-11-13 18:15:48,730 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_set_mode [2021-11-13 18:15:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure video_device_node_name [2021-11-13 18:15:48,731 INFO L138 BoogieDeclarations]: Found implementation of procedure video_device_node_name [2021-11-13 18:15:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:15:48,731 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:15:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:15:48,731 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:15:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_resolution_set [2021-11-13 18:15:48,732 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_resolution_set [2021-11-13 18:15:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-13 18:15:48,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-13 18:15:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_is_ac97_ready [2021-11-13 18:15:48,732 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_is_ac97_ready [2021-11-13 18:15:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-13 18:15:48,733 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-13 18:15:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_querycap [2021-11-13 18:15:48,733 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_querycap [2021-11-13 18:15:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_v4l2_open [2021-11-13 18:15:48,733 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_v4l2_open [2021-11-13 18:15:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_plane_size [2021-11-13 18:15:48,734 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_plane_size [2021-11-13 18:15:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:15:48,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:15:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~~u16~0~X~$Pointer$~X~int~TO~int [2021-11-13 18:15:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~~u16~0~X~$Pointer$~X~int~TO~int [2021-11-13 18:15:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:15:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:15:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:15:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:15:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:15:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_uninit_usb_xfer [2021-11-13 18:15:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_uninit_usb_xfer [2021-11-13 18:15:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure finish_field_prepare_next [2021-11-13 18:15:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_field_prepare_next [2021-11-13 18:15:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_read_ac97 [2021-11-13 18:15:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_read_ac97 [2021-11-13 18:15:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_wake_i2c [2021-11-13 18:15:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_wake_i2c [2021-11-13 18:15:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure size_to_scale [2021-11-13 18:15:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure size_to_scale [2021-11-13 18:15:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_get_drv_priv [2021-11-13 18:15:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_get_drv_priv [2021-11-13 18:15:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure vidioc_s_register [2021-11-13 18:15:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure vidioc_s_register [2021-11-13 18:15:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure scale_to_size [2021-11-13 18:15:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure scale_to_size [2021-11-13 18:15:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure print_err_status [2021-11-13 18:15:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure print_err_status [2021-11-13 18:15:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure norm_maxw [2021-11-13 18:15:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure norm_maxw [2021-11-13 18:15:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure norm_maxh [2021-11-13 18:15:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure norm_maxh [2021-11-13 18:15:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:15:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:15:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:15:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure vb2_plane_vaddr [2021-11-13 18:15:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure vb2_plane_vaddr [2021-11-13 18:15:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-13 18:15:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-13 18:15:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure em28xx_capture_start [2021-11-13 18:15:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure em28xx_capture_start [2021-11-13 18:18:25,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:18:25,555 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:18:25,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:18:25 BoogieIcfgContainer [2021-11-13 18:18:25,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:18:25,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:18:25,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:18:25,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:18:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:15:38" (1/3) ... [2021-11-13 18:18:25,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2216e6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:18:25, skipping insertion in model container [2021-11-13 18:18:25,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:15:46" (2/3) ... [2021-11-13 18:18:25,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2216e6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:18:25, skipping insertion in model container [2021-11-13 18:18:25,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:18:25" (3/3) ... [2021-11-13 18:18:25,571 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--em28xx--em28xx.ko-ldv_main0.cil.out.i [2021-11-13 18:18:25,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:18:25,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:18:25,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:18:25,669 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:18:25,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:18:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 1900 states, 1392 states have (on average 1.3915229885057472) internal successors, (1937), 1417 states have internal predecessors, (1937), 395 states have call successors, (395), 111 states have call predecessors, (395), 111 states have return successors, (395), 394 states have call predecessors, (395), 395 states have call successors, (395) [2021-11-13 18:18:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:18:25,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:25,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:25,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 284761344, now seen corresponding path program 1 times [2021-11-13 18:18:25,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:25,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788528623] [2021-11-13 18:18:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:25,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:28,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:18:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:28,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:28,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788528623] [2021-11-13 18:18:28,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788528623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:28,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:28,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:18:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299767970] [2021-11-13 18:18:28,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:28,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:18:28,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:18:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:18:28,858 INFO L87 Difference]: Start difference. First operand has 1900 states, 1392 states have (on average 1.3915229885057472) internal successors, (1937), 1417 states have internal predecessors, (1937), 395 states have call successors, (395), 111 states have call predecessors, (395), 111 states have return successors, (395), 394 states have call predecessors, (395), 395 states have call successors, (395) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:31,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:33,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:37,424 INFO L93 Difference]: Finished difference Result 3838 states and 5681 transitions. [2021-11-13 18:18:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:18:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-13 18:18:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:37,479 INFO L225 Difference]: With dead ends: 3838 [2021-11-13 18:18:37,480 INFO L226 Difference]: Without dead ends: 1936 [2021-11-13 18:18:37,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:37,507 INFO L933 BasicCegarLoop]: 2339 mSDtfsCounter, 3569 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 1146 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7269.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3681 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.01ms SdHoareTripleChecker+Time, 1146 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7937.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:37,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3681 Valid, 2747 Invalid, 1829 Unknown, 0 Unchecked, 56.01ms Time], IncrementalHoareTripleChecker [1146 Valid, 681 Invalid, 2 Unknown, 0 Unchecked, 7937.73ms Time] [2021-11-13 18:18:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-11-13 18:18:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1896. [2021-11-13 18:18:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1391 states have (on average 1.387491013659238) internal successors, (1930), 1412 states have internal predecessors, (1930), 393 states have call successors, (393), 113 states have call predecessors, (393), 111 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2021-11-13 18:18:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2705 transitions. [2021-11-13 18:18:37,792 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2705 transitions. Word has length 12 [2021-11-13 18:18:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:37,793 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 2705 transitions. [2021-11-13 18:18:37,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2705 transitions. [2021-11-13 18:18:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:18:37,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:37,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:37,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:18:37,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash 236165592, now seen corresponding path program 1 times [2021-11-13 18:18:37,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:37,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817466354] [2021-11-13 18:18:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:37,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:18:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:39,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:39,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817466354] [2021-11-13 18:18:39,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817466354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:39,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:39,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:18:39,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357505343] [2021-11-13 18:18:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:39,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:18:39,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:18:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:18:39,376 INFO L87 Difference]: Start difference. First operand 1896 states and 2705 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:42,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:44,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:18:50,060 INFO L93 Difference]: Finished difference Result 2361 states and 3521 transitions. [2021-11-13 18:18:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:18:50,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-13 18:18:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:18:50,089 INFO L225 Difference]: With dead ends: 2361 [2021-11-13 18:18:50,089 INFO L226 Difference]: Without dead ends: 2358 [2021-11-13 18:18:50,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:18:50,094 INFO L933 BasicCegarLoop]: 2598 mSDtfsCounter, 4037 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 1079 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9441.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4230 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.09ms SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10314.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:18:50,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4230 Valid, 2977 Invalid, 2506 Unknown, 0 Unchecked, 48.09ms Time], IncrementalHoareTripleChecker [1079 Valid, 1425 Invalid, 2 Unknown, 0 Unchecked, 10314.89ms Time] [2021-11-13 18:18:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-11-13 18:18:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1895. [2021-11-13 18:18:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1391 states have (on average 1.3867721063982745) internal successors, (1929), 1411 states have internal predecessors, (1929), 392 states have call successors, (392), 113 states have call predecessors, (392), 111 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2021-11-13 18:18:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2703 transitions. [2021-11-13 18:18:50,255 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2703 transitions. Word has length 13 [2021-11-13 18:18:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:18:50,256 INFO L470 AbstractCegarLoop]: Abstraction has 1895 states and 2703 transitions. [2021-11-13 18:18:50,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2703 transitions. [2021-11-13 18:18:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 18:18:50,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:18:50,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:18:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:18:50,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:18:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:18:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1270297853, now seen corresponding path program 1 times [2021-11-13 18:18:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:18:50,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507461927] [2021-11-13 18:18:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:18:50,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:18:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:18:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:18:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:18:51,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:18:51,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507461927] [2021-11-13 18:18:51,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507461927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:51,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:18:51,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:18:51,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632505227] [2021-11-13 18:18:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:51,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:18:51,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:18:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:18:51,834 INFO L87 Difference]: Start difference. First operand 1895 states and 2703 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:18:54,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:18:56,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:02,466 INFO L93 Difference]: Finished difference Result 2360 states and 3519 transitions. [2021-11-13 18:19:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-13 18:19:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:02,489 INFO L225 Difference]: With dead ends: 2360 [2021-11-13 18:19:02,489 INFO L226 Difference]: Without dead ends: 2357 [2021-11-13 18:19:02,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:02,494 INFO L933 BasicCegarLoop]: 2613 mSDtfsCounter, 4029 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 1075 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9390.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4216 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.42ms SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10308.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:02,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4216 Valid, 2992 Invalid, 2499 Unknown, 0 Unchecked, 36.42ms Time], IncrementalHoareTripleChecker [1075 Valid, 1422 Invalid, 2 Unknown, 0 Unchecked, 10308.60ms Time] [2021-11-13 18:19:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-11-13 18:19:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1894. [2021-11-13 18:19:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1391 states have (on average 1.3860531991373113) internal successors, (1928), 1410 states have internal predecessors, (1928), 391 states have call successors, (391), 113 states have call predecessors, (391), 111 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2021-11-13 18:19:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2701 transitions. [2021-11-13 18:19:02,634 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2701 transitions. Word has length 14 [2021-11-13 18:19:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:02,634 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 2701 transitions. [2021-11-13 18:19:02,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2701 transitions. [2021-11-13 18:19:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:19:02,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:02,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:02,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:19:02,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:02,638 INFO L85 PathProgramCache]: Analyzing trace with hash -726019525, now seen corresponding path program 1 times [2021-11-13 18:19:02,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:02,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843083857] [2021-11-13 18:19:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:02,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:04,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:04,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843083857] [2021-11-13 18:19:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843083857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:04,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:04,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:19:04,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528270923] [2021-11-13 18:19:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:04,081 INFO L87 Difference]: Start difference. First operand 1894 states and 2701 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:06,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:08,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:23,341 INFO L93 Difference]: Finished difference Result 6416 states and 9496 transitions. [2021-11-13 18:19:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-13 18:19:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:23,390 INFO L225 Difference]: With dead ends: 6416 [2021-11-13 18:19:23,390 INFO L226 Difference]: Without dead ends: 4528 [2021-11-13 18:19:23,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:23,406 INFO L933 BasicCegarLoop]: 3207 mSDtfsCounter, 5058 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 4189 mSolverCounterSat, 1462 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16820.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5380 SdHoareTripleChecker+Valid, 4438 SdHoareTripleChecker+Invalid, 5653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 78.26ms SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 4189 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18698.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5380 Valid, 4438 Invalid, 5653 Unknown, 0 Unchecked, 78.26ms Time], IncrementalHoareTripleChecker [1462 Valid, 4189 Invalid, 2 Unknown, 0 Unchecked, 18698.69ms Time] [2021-11-13 18:19:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-11-13 18:19:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 3850. [2021-11-13 18:19:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 2839 states have (on average 1.3874603733709052) internal successors, (3939), 2868 states have internal predecessors, (3939), 786 states have call successors, (786), 214 states have call predecessors, (786), 224 states have return successors, (898), 791 states have call predecessors, (898), 774 states have call successors, (898) [2021-11-13 18:19:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 5623 transitions. [2021-11-13 18:19:23,696 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 5623 transitions. Word has length 15 [2021-11-13 18:19:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:23,697 INFO L470 AbstractCegarLoop]: Abstraction has 3850 states and 5623 transitions. [2021-11-13 18:19:23,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 5623 transitions. [2021-11-13 18:19:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:19:23,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:23,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:23,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:19:23,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1033255674, now seen corresponding path program 1 times [2021-11-13 18:19:23,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:23,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672037029] [2021-11-13 18:19:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:23,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:25,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:25,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672037029] [2021-11-13 18:19:25,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672037029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:25,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:25,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:19:25,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868511928] [2021-11-13 18:19:25,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:25,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:25,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:25,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:25,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:25,225 INFO L87 Difference]: Start difference. First operand 3850 states and 5623 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:27,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:29,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:35,247 INFO L93 Difference]: Finished difference Result 4526 states and 6783 transitions. [2021-11-13 18:19:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:35,248 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), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-13 18:19:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:35,293 INFO L225 Difference]: With dead ends: 4526 [2021-11-13 18:19:35,293 INFO L226 Difference]: Without dead ends: 4523 [2021-11-13 18:19:35,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:35,299 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 4008 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 1073 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8829.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4205 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.19ms SdHoareTripleChecker+Time, 1073 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9724.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:35,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4205 Valid, 2995 Invalid, 2484 Unknown, 0 Unchecked, 26.19ms Time], IncrementalHoareTripleChecker [1073 Valid, 1409 Invalid, 2 Unknown, 0 Unchecked, 9724.26ms Time] [2021-11-13 18:19:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-11-13 18:19:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 3849. [2021-11-13 18:19:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 2839 states have (on average 1.3871081366678408) internal successors, (3938), 2867 states have internal predecessors, (3938), 785 states have call successors, (785), 214 states have call predecessors, (785), 224 states have return successors, (898), 791 states have call predecessors, (898), 774 states have call successors, (898) [2021-11-13 18:19:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5621 transitions. [2021-11-13 18:19:35,586 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5621 transitions. Word has length 16 [2021-11-13 18:19:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:35,587 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 5621 transitions. [2021-11-13 18:19:35,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5621 transitions. [2021-11-13 18:19:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:19:35,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:35,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:35,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:19:35,591 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1967636834, now seen corresponding path program 1 times [2021-11-13 18:19:35,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:35,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466948617] [2021-11-13 18:19:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:35,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:36,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:36,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:36,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466948617] [2021-11-13 18:19:36,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466948617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:36,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:36,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:19:36,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440313479] [2021-11-13 18:19:36,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:36,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:36,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:36,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:36,901 INFO L87 Difference]: Start difference. First operand 3849 states and 5621 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:39,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:41,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:46,594 INFO L93 Difference]: Finished difference Result 4525 states and 6781 transitions. [2021-11-13 18:19:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:46,595 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), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-13 18:19:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:46,635 INFO L225 Difference]: With dead ends: 4525 [2021-11-13 18:19:46,636 INFO L226 Difference]: Without dead ends: 4522 [2021-11-13 18:19:46,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:46,640 INFO L933 BasicCegarLoop]: 2615 mSDtfsCounter, 4007 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 1069 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8464.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4204 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.91ms SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9299.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:46,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4204 Valid, 2994 Invalid, 2477 Unknown, 0 Unchecked, 23.91ms Time], IncrementalHoareTripleChecker [1069 Valid, 1406 Invalid, 2 Unknown, 0 Unchecked, 9299.59ms Time] [2021-11-13 18:19:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-11-13 18:19:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 3848. [2021-11-13 18:19:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 2839 states have (on average 1.3867558999647764) internal successors, (3937), 2866 states have internal predecessors, (3937), 784 states have call successors, (784), 214 states have call predecessors, (784), 224 states have return successors, (898), 791 states have call predecessors, (898), 774 states have call successors, (898) [2021-11-13 18:19:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 5619 transitions. [2021-11-13 18:19:46,915 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 5619 transitions. Word has length 17 [2021-11-13 18:19:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 3848 states and 5619 transitions. [2021-11-13 18:19:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 5619 transitions. [2021-11-13 18:19:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:19:46,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:46,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:46,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:19:46,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -868676855, now seen corresponding path program 1 times [2021-11-13 18:19:46,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:46,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027195390] [2021-11-13 18:19:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:46,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:48,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:19:48,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:48,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027195390] [2021-11-13 18:19:48,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027195390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:48,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:48,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:19:48,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403700464] [2021-11-13 18:19:48,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:48,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:19:48,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:19:48,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:19:48,103 INFO L87 Difference]: Start difference. First operand 3848 states and 5619 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:50,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:52,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:58,167 INFO L93 Difference]: Finished difference Result 4524 states and 6779 transitions. [2021-11-13 18:19:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:19:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-13 18:19:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:58,210 INFO L225 Difference]: With dead ends: 4524 [2021-11-13 18:19:58,210 INFO L226 Difference]: Without dead ends: 4513 [2021-11-13 18:19:58,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:58,215 INFO L933 BasicCegarLoop]: 2610 mSDtfsCounter, 4007 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 1069 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8908.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.76ms SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9771.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:58,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 2989 Invalid, 2482 Unknown, 0 Unchecked, 23.76ms Time], IncrementalHoareTripleChecker [1069 Valid, 1411 Invalid, 2 Unknown, 0 Unchecked, 9771.06ms Time] [2021-11-13 18:19:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4513 states. [2021-11-13 18:19:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4513 to 3839. [2021-11-13 18:19:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 2832 states have (on average 1.3862994350282485) internal successors, (3926), 2858 states have internal predecessors, (3926), 782 states have call successors, (782), 213 states have call predecessors, (782), 224 states have return successors, (898), 791 states have call predecessors, (898), 774 states have call successors, (898) [2021-11-13 18:19:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 5606 transitions. [2021-11-13 18:19:58,533 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 5606 transitions. Word has length 18 [2021-11-13 18:19:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:58,534 INFO L470 AbstractCegarLoop]: Abstraction has 3839 states and 5606 transitions. [2021-11-13 18:19:58,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:19:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 5606 transitions. [2021-11-13 18:19:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:19:58,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:58,544 INFO L514 BasicCegarLoop]: 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] [2021-11-13 18:19:58,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:19:58,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2142084878, now seen corresponding path program 1 times [2021-11-13 18:19:58,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:58,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433484946] [2021-11-13 18:19:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:58,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:00,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:20:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:00,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:20:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:00,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:20:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:00,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:00,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433484946] [2021-11-13 18:20:00,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433484946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:00,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:00,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:20:00,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259965984] [2021-11-13 18:20:00,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:00,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:00,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:00,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:00,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:00,347 INFO L87 Difference]: Start difference. First operand 3839 states and 5606 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:20:02,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:05,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:15,691 INFO L93 Difference]: Finished difference Result 9073 states and 13568 transitions. [2021-11-13 18:20:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:20:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2021-11-13 18:20:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:15,734 INFO L225 Difference]: With dead ends: 9073 [2021-11-13 18:20:15,734 INFO L226 Difference]: Without dead ends: 5240 [2021-11-13 18:20:15,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:15,763 INFO L933 BasicCegarLoop]: 2805 mSDtfsCounter, 2290 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 753 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13293.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2671 SdHoareTripleChecker+Valid, 4645 SdHoareTripleChecker+Invalid, 4582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 64.29ms SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14885.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:15,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2671 Valid, 4645 Invalid, 4582 Unknown, 0 Unchecked, 64.29ms Time], IncrementalHoareTripleChecker [753 Valid, 3827 Invalid, 2 Unknown, 0 Unchecked, 14885.77ms Time] [2021-11-13 18:20:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5240 states. [2021-11-13 18:20:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5240 to 4553. [2021-11-13 18:20:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 3337 states have (on average 1.39736290080911) internal successors, (4663), 3365 states have internal predecessors, (4663), 990 states have call successors, (990), 213 states have call predecessors, (990), 225 states have return successors, (1111), 998 states have call predecessors, (1111), 982 states have call successors, (1111) [2021-11-13 18:20:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6764 transitions. [2021-11-13 18:20:16,117 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6764 transitions. Word has length 43 [2021-11-13 18:20:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:16,120 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6764 transitions. [2021-11-13 18:20:16,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:20:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6764 transitions. [2021-11-13 18:20:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:20:16,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:16,132 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-13 18:20:16,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:20:16,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash 691019944, now seen corresponding path program 1 times [2021-11-13 18:20:16,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:16,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318553901] [2021-11-13 18:20:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:16,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:17,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:20:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:18,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:20:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:18,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:20:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:18,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:20:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:18,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:20:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:18,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318553901] [2021-11-13 18:20:18,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318553901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:18,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:18,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:20:18,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983091910] [2021-11-13 18:20:18,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:18,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:20:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:18,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:20:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:20:18,154 INFO L87 Difference]: Start difference. First operand 4553 states and 6764 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:20:20,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:22,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:25,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:27,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:39,345 INFO L93 Difference]: Finished difference Result 5998 states and 9480 transitions. [2021-11-13 18:20:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:20:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-11-13 18:20:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:39,394 INFO L225 Difference]: With dead ends: 5998 [2021-11-13 18:20:39,394 INFO L226 Difference]: Without dead ends: 5995 [2021-11-13 18:20:39,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:20:39,401 INFO L933 BasicCegarLoop]: 2610 mSDtfsCounter, 4425 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 4966 mSolverCounterSat, 2374 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18471.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4539 SdHoareTripleChecker+Valid, 4990 SdHoareTripleChecker+Invalid, 7343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 62.34ms SdHoareTripleChecker+Time, 2374 IncrementalHoareTripleChecker+Valid, 4966 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20506.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:39,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4539 Valid, 4990 Invalid, 7343 Unknown, 0 Unchecked, 62.34ms Time], IncrementalHoareTripleChecker [2374 Valid, 4966 Invalid, 3 Unknown, 0 Unchecked, 20506.65ms Time] [2021-11-13 18:20:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-11-13 18:20:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 4360. [2021-11-13 18:20:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 3199 states have (on average 1.3991872460143795) internal successors, (4476), 3230 states have internal predecessors, (4476), 946 states have call successors, (946), 213 states have call predecessors, (946), 214 states have return successors, (960), 937 states have call predecessors, (960), 939 states have call successors, (960) [2021-11-13 18:20:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 6382 transitions. [2021-11-13 18:20:39,761 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 6382 transitions. Word has length 65 [2021-11-13 18:20:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:39,762 INFO L470 AbstractCegarLoop]: Abstraction has 4360 states and 6382 transitions. [2021-11-13 18:20:39,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:20:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 6382 transitions. [2021-11-13 18:20:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:20:39,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:39,773 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:39,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:20:39,774 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash -253409404, now seen corresponding path program 1 times [2021-11-13 18:20:39,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:39,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055785367] [2021-11-13 18:20:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:39,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:20:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:20:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:20:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:20:41,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:41,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055785367] [2021-11-13 18:20:41,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055785367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:41,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:41,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:20:41,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989892544] [2021-11-13 18:20:41,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:41,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:41,347 INFO L87 Difference]: Start difference. First operand 4360 states and 6382 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:20:44,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:54,612 INFO L93 Difference]: Finished difference Result 10670 states and 16118 transitions. [2021-11-13 18:20:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:20:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2021-11-13 18:20:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:54,655 INFO L225 Difference]: With dead ends: 10670 [2021-11-13 18:20:54,655 INFO L226 Difference]: Without dead ends: 6316 [2021-11-13 18:20:54,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:54,686 INFO L933 BasicCegarLoop]: 2800 mSDtfsCounter, 2262 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 3791 mSolverCounterSat, 750 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11354.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2648 SdHoareTripleChecker+Valid, 4644 SdHoareTripleChecker+Invalid, 4542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.43ms SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 3791 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12816.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:54,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2648 Valid, 4644 Invalid, 4542 Unknown, 0 Unchecked, 48.43ms Time], IncrementalHoareTripleChecker [750 Valid, 3791 Invalid, 1 Unknown, 0 Unchecked, 12816.75ms Time] [2021-11-13 18:20:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6316 states. [2021-11-13 18:20:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6316 to 5419. [2021-11-13 18:20:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 3951 states have (on average 1.410528980005062) internal successors, (5573), 3983 states have internal predecessors, (5573), 1253 states have call successors, (1253), 213 states have call predecessors, (1253), 214 states have return successors, (1273), 1243 states have call predecessors, (1273), 1246 states have call successors, (1273) [2021-11-13 18:20:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 8099 transitions. [2021-11-13 18:20:55,072 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 8099 transitions. Word has length 70 [2021-11-13 18:20:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:55,073 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 8099 transitions. [2021-11-13 18:20:55,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:20:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 8099 transitions. [2021-11-13 18:20:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-13 18:20:55,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:55,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:55,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:20:55,086 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1009826591, now seen corresponding path program 1 times [2021-11-13 18:20:55,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:55,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810891135] [2021-11-13 18:20:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:55,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:20:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:20:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:20:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:20:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:20:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 18:20:56,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:56,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810891135] [2021-11-13 18:20:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810891135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:56,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:56,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:20:56,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187680421] [2021-11-13 18:20:56,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:56,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:20:56,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:20:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:20:56,861 INFO L87 Difference]: Start difference. First operand 5419 states and 8099 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:20:59,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:01,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:03,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:06,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:27,357 INFO L93 Difference]: Finished difference Result 10987 states and 16848 transitions. [2021-11-13 18:21:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:21:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-13 18:21:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:27,397 INFO L225 Difference]: With dead ends: 10987 [2021-11-13 18:21:27,397 INFO L226 Difference]: Without dead ends: 5574 [2021-11-13 18:21:27,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:21:27,437 INFO L933 BasicCegarLoop]: 2769 mSDtfsCounter, 3019 mSDsluCounter, 5449 mSDsCounter, 0 mSdLazyCounter, 10329 mSolverCounterSat, 1662 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26547.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3117 SdHoareTripleChecker+Valid, 8218 SdHoareTripleChecker+Invalid, 11994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 111.82ms SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 10329 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29588.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:27,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3117 Valid, 8218 Invalid, 11994 Unknown, 0 Unchecked, 111.82ms Time], IncrementalHoareTripleChecker [1662 Valid, 10329 Invalid, 3 Unknown, 0 Unchecked, 29588.30ms Time] [2021-11-13 18:21:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-11-13 18:21:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 4035. [2021-11-13 18:21:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 2953 states have (on average 1.3975618015577378) internal successors, (4127), 2979 states have internal predecessors, (4127), 892 states have call successors, (892), 189 states have call predecessors, (892), 189 states have return successors, (902), 887 states have call predecessors, (902), 887 states have call successors, (902) [2021-11-13 18:21:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 5921 transitions. [2021-11-13 18:21:27,769 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 5921 transitions. Word has length 85 [2021-11-13 18:21:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:27,770 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 5921 transitions. [2021-11-13 18:21:27,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:21:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 5921 transitions. [2021-11-13 18:21:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 18:21:27,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:27,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:27,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:21:27,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash -79626141, now seen corresponding path program 1 times [2021-11-13 18:21:27,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:27,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868837558] [2021-11-13 18:21:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:27,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:21:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:21:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:21:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:21:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 18:21:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 18:21:29,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:29,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868837558] [2021-11-13 18:21:29,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868837558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:29,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:29,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:21:29,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961871195] [2021-11-13 18:21:29,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:29,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:21:29,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:21:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:21:29,355 INFO L87 Difference]: Start difference. First operand 4035 states and 5921 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:21:32,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:34,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:36,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:54,375 INFO L93 Difference]: Finished difference Result 7545 states and 11254 transitions. [2021-11-13 18:21:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:21:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-11-13 18:21:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:54,412 INFO L225 Difference]: With dead ends: 7545 [2021-11-13 18:21:54,412 INFO L226 Difference]: Without dead ends: 5240 [2021-11-13 18:21:54,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:21:54,425 INFO L933 BasicCegarLoop]: 4101 mSDtfsCounter, 4554 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 6115 mSolverCounterSat, 2183 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21763.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 6133 SdHoareTripleChecker+Invalid, 8301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.03ms SdHoareTripleChecker+Time, 2183 IncrementalHoareTripleChecker+Valid, 6115 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24358.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:54,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 6133 Invalid, 8301 Unknown, 0 Unchecked, 76.03ms Time], IncrementalHoareTripleChecker [2183 Valid, 6115 Invalid, 3 Unknown, 0 Unchecked, 24358.26ms Time] [2021-11-13 18:21:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5240 states. [2021-11-13 18:21:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5240 to 4017. [2021-11-13 18:21:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 2940 states have (on average 1.3979591836734695) internal successors, (4110), 2966 states have internal predecessors, (4110), 892 states have call successors, (892), 189 states have call predecessors, (892), 184 states have return successors, (884), 882 states have call predecessors, (884), 884 states have call successors, (884) [2021-11-13 18:21:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5886 transitions. [2021-11-13 18:21:54,757 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5886 transitions. Word has length 120 [2021-11-13 18:21:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:54,757 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5886 transitions. [2021-11-13 18:21:54,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:21:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5886 transitions. [2021-11-13 18:21:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 18:21:54,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:54,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:54,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:21:54,770 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2018594425, now seen corresponding path program 1 times [2021-11-13 18:21:54,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:54,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722744723] [2021-11-13 18:21:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:54,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:21:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:21:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:21:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:21:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:21:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 18:21:57,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:57,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722744723] [2021-11-13 18:21:57,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722744723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:57,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:57,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:21:57,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013450181] [2021-11-13 18:21:57,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:57,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:21:57,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:21:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:57,666 INFO L87 Difference]: Start difference. First operand 4017 states and 5886 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:22:00,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:02,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:04,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:20,144 INFO L93 Difference]: Finished difference Result 7304 states and 10859 transitions. [2021-11-13 18:22:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:22:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2021-11-13 18:22:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:20,171 INFO L225 Difference]: With dead ends: 7304 [2021-11-13 18:22:20,171 INFO L226 Difference]: Without dead ends: 5017 [2021-11-13 18:22:20,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:22:20,182 INFO L933 BasicCegarLoop]: 2855 mSDtfsCounter, 2511 mSDsluCounter, 5195 mSDsCounter, 0 mSdLazyCounter, 7684 mSolverCounterSat, 1246 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19478.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2594 SdHoareTripleChecker+Valid, 8050 SdHoareTripleChecker+Invalid, 8932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 84.56ms SdHoareTripleChecker+Time, 1246 IncrementalHoareTripleChecker+Valid, 7684 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21753.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:20,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2594 Valid, 8050 Invalid, 8932 Unknown, 0 Unchecked, 84.56ms Time], IncrementalHoareTripleChecker [1246 Valid, 7684 Invalid, 2 Unknown, 0 Unchecked, 21753.90ms Time] [2021-11-13 18:22:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2021-11-13 18:22:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 3922. [2021-11-13 18:22:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 2878 states have (on average 1.3988881167477414) internal successors, (4026), 2899 states have internal predecessors, (4026), 862 states have call successors, (862), 185 states have call predecessors, (862), 181 states have return successors, (857), 855 states have call predecessors, (857), 857 states have call successors, (857) [2021-11-13 18:22:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 5745 transitions. [2021-11-13 18:22:20,493 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 5745 transitions. Word has length 93 [2021-11-13 18:22:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:20,494 INFO L470 AbstractCegarLoop]: Abstraction has 3922 states and 5745 transitions. [2021-11-13 18:22:20,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:22:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 5745 transitions. [2021-11-13 18:22:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 18:22:20,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:20,511 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:20,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:22:20,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash 315256569, now seen corresponding path program 1 times [2021-11-13 18:22:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:20,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507461455] [2021-11-13 18:22:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:20,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:22:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:22:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:22:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:22:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:22:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:22:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:22,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 18:22:22,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:22,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507461455] [2021-11-13 18:22:22,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507461455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:22,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:22,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:22:22,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638694036] [2021-11-13 18:22:22,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:22,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:22:22,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:22:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:22:22,061 INFO L87 Difference]: Start difference. First operand 3922 states and 5745 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:22:24,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:26,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:34,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:39,865 INFO L93 Difference]: Finished difference Result 8915 states and 13456 transitions. [2021-11-13 18:22:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:22:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-13 18:22:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:39,896 INFO L225 Difference]: With dead ends: 8915 [2021-11-13 18:22:39,896 INFO L226 Difference]: Without dead ends: 4999 [2021-11-13 18:22:39,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:22:39,916 INFO L933 BasicCegarLoop]: 2739 mSDtfsCounter, 5052 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 1904 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15012.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5264 SdHoareTripleChecker+Valid, 3819 SdHoareTripleChecker+Invalid, 4218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.47ms SdHoareTripleChecker+Time, 1904 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17228.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:39,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5264 Valid, 3819 Invalid, 4218 Unknown, 0 Unchecked, 46.47ms Time], IncrementalHoareTripleChecker [1904 Valid, 2311 Invalid, 3 Unknown, 0 Unchecked, 17228.43ms Time] [2021-11-13 18:22:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-11-13 18:22:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 3908. [2021-11-13 18:22:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 2869 states have (on average 1.3900313698152666) internal successors, (3988), 2890 states have internal predecessors, (3988), 858 states have call successors, (858), 184 states have call predecessors, (858), 180 states have return successors, (853), 851 states have call predecessors, (853), 853 states have call successors, (853) [2021-11-13 18:22:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 5699 transitions. [2021-11-13 18:22:40,288 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 5699 transitions. Word has length 113 [2021-11-13 18:22:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:40,289 INFO L470 AbstractCegarLoop]: Abstraction has 3908 states and 5699 transitions. [2021-11-13 18:22:40,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:22:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 5699 transitions. [2021-11-13 18:22:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 18:22:40,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:40,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:40,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:22:40,308 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:40,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1272615481, now seen corresponding path program 1 times [2021-11-13 18:22:40,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:40,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405082000] [2021-11-13 18:22:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:40,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:22:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:22:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:22:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:22:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:22:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:22:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:22:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:22:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:22:43,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:22:43,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405082000] [2021-11-13 18:22:43,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405082000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:43,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:22:43,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 18:22:43,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927140959] [2021-11-13 18:22:43,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:22:43,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:22:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:22:43,942 INFO L87 Difference]: Start difference. First operand 3908 states and 5699 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:22:46,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:22:48,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:23:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:23,865 INFO L93 Difference]: Finished difference Result 8886 states and 13305 transitions. [2021-11-13 18:23:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:23:23,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2021-11-13 18:23:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:23,891 INFO L225 Difference]: With dead ends: 8886 [2021-11-13 18:23:23,891 INFO L226 Difference]: Without dead ends: 4984 [2021-11-13 18:23:23,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:23:23,911 INFO L933 BasicCegarLoop]: 2756 mSDtfsCounter, 2475 mSDsluCounter, 11446 mSDsCounter, 0 mSdLazyCounter, 16354 mSolverCounterSat, 1258 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34746.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 14202 SdHoareTripleChecker+Invalid, 17614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 170.01ms SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 16354 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38711.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:23,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2556 Valid, 14202 Invalid, 17614 Unknown, 0 Unchecked, 170.01ms Time], IncrementalHoareTripleChecker [1258 Valid, 16354 Invalid, 2 Unknown, 0 Unchecked, 38711.03ms Time] [2021-11-13 18:23:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-11-13 18:23:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 3919. [2021-11-13 18:23:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 2877 states have (on average 1.388946819603754) internal successors, (3996), 2898 states have internal predecessors, (3996), 858 states have call successors, (858), 184 states have call predecessors, (858), 183 states have return successors, (862), 854 states have call predecessors, (862), 853 states have call successors, (862) [2021-11-13 18:23:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 5716 transitions. [2021-11-13 18:23:24,247 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 5716 transitions. Word has length 113 [2021-11-13 18:23:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:24,248 INFO L470 AbstractCegarLoop]: Abstraction has 3919 states and 5716 transitions. [2021-11-13 18:23:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 7 states have internal predecessors, (74), 2 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:23:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 5716 transitions. [2021-11-13 18:23:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:23:24,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:24,265 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:24,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:23:24,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash -719879426, now seen corresponding path program 1 times [2021-11-13 18:23:24,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:24,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073932548] [2021-11-13 18:23:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:24,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:24:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:24:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:24:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:24:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:24:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:24:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:24:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:24:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:24:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:24:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:37,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:24:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:37,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:24:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:24:37,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:37,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073932548] [2021-11-13 18:24:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073932548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:37,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137282488] [2021-11-13 18:24:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:37,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:37,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:37,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b90c58e7-9887-417f-b764-5f3ccc2edad1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process