./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/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_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/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_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/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 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:47:55,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:47:55,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:47:55,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:47:55,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:47:55,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:47:55,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:47:55,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:47:55,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:47:55,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:47:55,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:47:55,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:47:55,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:47:55,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:47:55,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:47:55,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:47:55,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:47:55,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:47:55,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:47:55,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:47:55,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:47:55,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:47:55,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:47:55,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:47:55,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:47:55,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:47:55,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:47:55,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:47:55,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:47:55,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:47:55,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:47:55,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:47:55,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:47:55,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:47:55,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:47:55,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:47:55,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:47:55,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:47:55,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:47:55,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:47:55,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:47:55,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 17:47:55,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:47:55,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:47:55,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:47:55,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:47:55,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:47:55,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:47:55,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:47:55,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:47:55,874 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:47:55,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:47:55,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:47:55,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:47:55,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:47:55,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:47:55,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:47:55,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:47:55,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:47:55,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:47:55,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:47:55,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:47:55,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:47:55,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:55,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:47:55,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:47:55,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:47:55,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:47:55,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:47:55,879 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:47:55,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:47:55,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:47:55,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:47:55,882 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_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b2aee7f7e67804021e49e5736bb0f9c1b2e215c216274214a3b77fa62ce19be [2021-11-13 17:47:56,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:47:56,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:47:56,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:47:56,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:47:56,201 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:47:56,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-13 17:47:56,274 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/data/37d727507/5e5b46fd86214172977604252ea88329/FLAGabb892cd3 [2021-11-13 17:47:57,077 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:47:57,077 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-13 17:47:57,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/data/37d727507/5e5b46fd86214172977604252ea88329/FLAGabb892cd3 [2021-11-13 17:47:57,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/data/37d727507/5e5b46fd86214172977604252ea88329 [2021-11-13 17:47:57,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:47:57,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:47:57,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:57,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:47:57,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:47:57,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:57" (1/1) ... [2021-11-13 17:47:57,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178f9522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:57, skipping insertion in model container [2021-11-13 17:47:57,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:57" (1/1) ... [2021-11-13 17:47:57,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:47:57,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:47:58,846 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_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-11-13 17:47:59,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:59,463 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:47:59,676 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_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[182154,182167] [2021-11-13 17:47:59,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:59,970 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:47:59,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59 WrapperNode [2021-11-13 17:47:59,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:59,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:59,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:47:59,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:47:59,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:48:00,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:48:00,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:48:00,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:48:00,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:48:00,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:48:00,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:48:00,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:48:00,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (1/1) ... [2021-11-13 17:48:00,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:48:00,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:00,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:48:00,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:48:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_reset_device [2021-11-13 17:48:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_reset_device [2021-11-13 17:48:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_resume [2021-11-13 17:48:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_resume [2021-11-13 17:48:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 17:48:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-13 17:48:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-13 17:48:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_12 [2021-11-13 17:48:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_12 [2021-11-13 17:48:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 17:48:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 17:48:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 17:48:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 17:48:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:48:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-13 17:48:00,514 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-13 17:48:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-13 17:48:00,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-13 17:48:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 17:48:00,515 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 17:48:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 17:48:00,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 17:48:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 17:48:00,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 17:48:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-13 17:48:00,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-13 17:48:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb_fwload [2021-11-13 17:48:00,517 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb_fwload [2021-11-13 17:48:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 17:48:00,517 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 17:48:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-11-13 17:48:00,517 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-11-13 17:48:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_submit_rx_urb [2021-11-13 17:48:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_submit_rx_urb [2021-11-13 17:48:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive_fwload [2021-11-13 17:48:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive_fwload [2021-11-13 17:48:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 17:48:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 17:48:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_send_fw_pkt [2021-11-13 17:48:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_send_fw_pkt [2021-11-13 17:48:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure __if_usb_submit_rx_urb [2021-11-13 17:48:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __if_usb_submit_rx_urb [2021-11-13 17:48:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:48:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 17:48:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 17:48:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_free [2021-11-13 17:48:00,520 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_free [2021-11-13 17:48:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 17:48:00,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 17:48:00,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 17:48:00,520 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 17:48:00,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 17:48:00,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 17:48:00,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:48:00,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 17:48:00,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 17:48:00,522 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_disconnect [2021-11-13 17:48:00,522 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_disconnect [2021-11-13 17:48:00,523 INFO L130 BoogieDeclarations]: Found specification of procedure usb_tx_block [2021-11-13 17:48:00,524 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_tx_block [2021-11-13 17:48:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-11-13 17:48:00,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-11-13 17:48:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_9 [2021-11-13 17:48:00,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_9 [2021-11-13 17:48:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 17:48:00,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 17:48:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:48:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:48:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 17:48:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 17:48:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 17:48:00,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2021-11-13 17:48:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2021-11-13 17:48:00,526 INFO L130 BoogieDeclarations]: Found specification of procedure current_thread_info [2021-11-13 17:48:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure current_thread_info [2021-11-13 17:48:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:48:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2021-11-13 17:48:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2021-11-13 17:48:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 17:48:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 17:48:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-11-13 17:48:00,528 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-11-13 17:48:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2021-11-13 17:48:00,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2021-11-13 17:48:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:48:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 17:48:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-13 17:48:00,528 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-13 17:48:00,529 INFO L130 BoogieDeclarations]: Found specification of procedure lbs_remove_card [2021-11-13 17:48:00,529 INFO L138 BoogieDeclarations]: Found implementation of procedure lbs_remove_card [2021-11-13 17:48:00,529 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 17:48:00,529 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 17:48:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-13 17:48:00,530 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-13 17:48:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure if_usb_receive [2021-11-13 17:48:00,530 INFO L138 BoogieDeclarations]: Found implementation of procedure if_usb_receive [2021-11-13 17:48:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-13 17:48:00,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-13 17:48:00,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:48:00,531 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-13 17:48:00,532 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-13 17:48:00,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 17:48:00,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 17:48:00,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 17:48:00,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:48:00,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:48:01,548 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 17:48:02,349 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 17:48:11,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:48:11,476 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 17:48:11,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:48:11 BoogieIcfgContainer [2021-11-13 17:48:11,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:48:11,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:48:11,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:48:11,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:48:11,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:47:57" (1/3) ... [2021-11-13 17:48:11,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1833b87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:48:11, skipping insertion in model container [2021-11-13 17:48:11,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:59" (2/3) ... [2021-11-13 17:48:11,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1833b87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:48:11, skipping insertion in model container [2021-11-13 17:48:11,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:48:11" (3/3) ... [2021-11-13 17:48:11,488 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-13 17:48:11,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:48:11,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:48:11,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:48:11,567 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:48:11,568 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:48:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 826 states, 603 states have (on average 1.3747927031509122) internal successors, (829), 633 states have internal predecessors, (829), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) [2021-11-13 17:48:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 17:48:11,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:11,640 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] [2021-11-13 17:48:11,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash 527149613, now seen corresponding path program 1 times [2021-11-13 17:48:11,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:11,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126411238] [2021-11-13 17:48:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:11,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:48:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:12,497 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 17:48:12,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:12,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126411238] [2021-11-13 17:48:12,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126411238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:12,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:12,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:12,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44190419] [2021-11-13 17:48:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:12,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:12,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:12,535 INFO L87 Difference]: Start difference. First operand has 826 states, 603 states have (on average 1.3747927031509122) internal successors, (829), 633 states have internal predecessors, (829), 178 states have call successors, (178), 45 states have call predecessors, (178), 43 states have return successors, (172), 166 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:48:14,621 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 17:48:16,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:18,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:23,670 INFO L93 Difference]: Finished difference Result 2773 states and 4101 transitions. [2021-11-13 17:48:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:48:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-13 17:48:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:23,712 INFO L225 Difference]: With dead ends: 2773 [2021-11-13 17:48:23,713 INFO L226 Difference]: Without dead ends: 1924 [2021-11-13 17:48:23,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:23,728 INFO L933 BasicCegarLoop]: 1260 mSDtfsCounter, 2444 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 1176 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9639.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2557 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.56ms SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10767.96ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:23,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2557 Valid, 3212 Invalid, 2644 Unknown, 0 Unchecked, 54.56ms Time], IncrementalHoareTripleChecker [1176 Valid, 1465 Invalid, 3 Unknown, 0 Unchecked, 10767.96ms Time] [2021-11-13 17:48:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-11-13 17:48:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1585. [2021-11-13 17:48:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1165 states have (on average 1.36137339055794) internal successors, (1586), 1205 states have internal predecessors, (1586), 336 states have call successors, (336), 84 states have call predecessors, (336), 83 states have return successors, (331), 319 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-13 17:48:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2253 transitions. [2021-11-13 17:48:23,948 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2253 transitions. Word has length 29 [2021-11-13 17:48:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:23,949 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2253 transitions. [2021-11-13 17:48:23,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 17:48:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2253 transitions. [2021-11-13 17:48:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:48:23,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:23,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:23,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:48:23,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash 195057076, now seen corresponding path program 1 times [2021-11-13 17:48:23,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:23,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44596974] [2021-11-13 17:48:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:23,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:48:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:48:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:48:24,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:24,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44596974] [2021-11-13 17:48:24,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44596974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:24,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:24,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:24,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686776076] [2021-11-13 17:48:24,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:24,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:24,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:24,356 INFO L87 Difference]: Start difference. First operand 1585 states and 2253 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:26,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:28,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:31,109 INFO L93 Difference]: Finished difference Result 1950 states and 2809 transitions. [2021-11-13 17:48:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:48:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-13 17:48:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:31,128 INFO L225 Difference]: With dead ends: 1950 [2021-11-13 17:48:31,128 INFO L226 Difference]: Without dead ends: 1937 [2021-11-13 17:48:31,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:31,132 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 1800 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 702 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6031.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.86ms SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6538.01ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:31,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1892 Valid, 1944 Invalid, 1436 Unknown, 0 Unchecked, 23.86ms Time], IncrementalHoareTripleChecker [702 Valid, 732 Invalid, 2 Unknown, 0 Unchecked, 6538.01ms Time] [2021-11-13 17:48:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-11-13 17:48:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1585. [2021-11-13 17:48:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1165 states have (on average 1.3605150214592274) internal successors, (1585), 1205 states have internal predecessors, (1585), 336 states have call successors, (336), 84 states have call predecessors, (336), 83 states have return successors, (331), 319 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-13 17:48:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2252 transitions. [2021-11-13 17:48:31,268 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2252 transitions. Word has length 39 [2021-11-13 17:48:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:31,269 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2252 transitions. [2021-11-13 17:48:31,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2252 transitions. [2021-11-13 17:48:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:48:31,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:31,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:31,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:48:31,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash 252315378, now seen corresponding path program 1 times [2021-11-13 17:48:31,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:31,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689456737] [2021-11-13 17:48:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:31,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:31,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:48:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:31,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:48:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:48:31,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:31,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689456737] [2021-11-13 17:48:31,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689456737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:31,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:31,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:31,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983754250] [2021-11-13 17:48:31,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:31,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:31,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:31,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:31,957 INFO L87 Difference]: Start difference. First operand 1585 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:34,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:36,145 WARN L515 Checker$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 17:48:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:40,726 INFO L93 Difference]: Finished difference Result 5389 states and 7961 transitions. [2021-11-13 17:48:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:48:40,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-13 17:48:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:40,757 INFO L225 Difference]: With dead ends: 5389 [2021-11-13 17:48:40,757 INFO L226 Difference]: Without dead ends: 3823 [2021-11-13 17:48:40,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:40,772 INFO L933 BasicCegarLoop]: 1237 mSDtfsCounter, 2528 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 1187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7754.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.43ms SdHoareTripleChecker+Time, 1187 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8443.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:40,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 3139 Invalid, 2596 Unknown, 0 Unchecked, 34.43ms Time], IncrementalHoareTripleChecker [1187 Valid, 1407 Invalid, 2 Unknown, 0 Unchecked, 8443.25ms Time] [2021-11-13 17:48:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-11-13 17:48:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3298. [2021-11-13 17:48:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3298 states, 2431 states have (on average 1.3562320032908268) internal successors, (3297), 2507 states have internal predecessors, (3297), 678 states have call successors, (678), 165 states have call predecessors, (678), 188 states have return successors, (793), 669 states have call predecessors, (793), 673 states have call successors, (793) [2021-11-13 17:48:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3298 states to 3298 states and 4768 transitions. [2021-11-13 17:48:40,973 INFO L78 Accepts]: Start accepts. Automaton has 3298 states and 4768 transitions. Word has length 39 [2021-11-13 17:48:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 3298 states and 4768 transitions. [2021-11-13 17:48:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3298 states and 4768 transitions. [2021-11-13 17:48:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 17:48:40,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:40,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:40,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:48:40,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -768568990, now seen corresponding path program 1 times [2021-11-13 17:48:40,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:40,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716716040] [2021-11-13 17:48:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:40,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:41,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:41,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:48:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:48:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:48:41,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:41,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716716040] [2021-11-13 17:48:41,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716716040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:41,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:41,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:41,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226063670] [2021-11-13 17:48:41,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:41,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:41,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:41,420 INFO L87 Difference]: Start difference. First operand 3298 states and 4768 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:43,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:45,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:49,914 INFO L93 Difference]: Finished difference Result 10872 states and 16391 transitions. [2021-11-13 17:48:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:48:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-13 17:48:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:49,979 INFO L225 Difference]: With dead ends: 10872 [2021-11-13 17:48:49,980 INFO L226 Difference]: Without dead ends: 7593 [2021-11-13 17:48:50,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:50,005 INFO L933 BasicCegarLoop]: 1184 mSDtfsCounter, 2543 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 1200 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7441.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.51ms SdHoareTripleChecker+Time, 1200 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8117.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:50,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2646 Valid, 3015 Invalid, 2609 Unknown, 0 Unchecked, 27.51ms Time], IncrementalHoareTripleChecker [1200 Valid, 1407 Invalid, 2 Unknown, 0 Unchecked, 8117.38ms Time] [2021-11-13 17:48:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2021-11-13 17:48:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6717. [2021-11-13 17:48:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 4956 states have (on average 1.3520984665052462) internal successors, (6701), 5104 states have internal predecessors, (6701), 1362 states have call successors, (1362), 327 states have call predecessors, (1362), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-11-13 17:48:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 9880 transitions. [2021-11-13 17:48:50,518 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 9880 transitions. Word has length 40 [2021-11-13 17:48:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:50,520 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 9880 transitions. [2021-11-13 17:48:50,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 9880 transitions. [2021-11-13 17:48:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:48:50,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:50,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:50,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:48:50,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:50,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:50,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1943758837, now seen corresponding path program 1 times [2021-11-13 17:48:50,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:50,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106845666] [2021-11-13 17:48:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:50,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:50,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:50,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:48:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:48:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:48:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:50,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106845666] [2021-11-13 17:48:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106845666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:50,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:50,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:50,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858909446] [2021-11-13 17:48:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:50,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:50,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:50,844 INFO L87 Difference]: Start difference. First operand 6717 states and 9880 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:52,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:55,017 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:48:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:58,962 INFO L93 Difference]: Finished difference Result 7591 states and 11290 transitions. [2021-11-13 17:48:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:48:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-13 17:48:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:59,018 INFO L225 Difference]: With dead ends: 7591 [2021-11-13 17:48:59,019 INFO L226 Difference]: Without dead ends: 7588 [2021-11-13 17:48:59,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:59,024 INFO L933 BasicCegarLoop]: 1192 mSDtfsCounter, 2530 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 1199 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7134.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2633 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.96ms SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7801.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:59,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2633 Valid, 3030 Invalid, 2599 Unknown, 0 Unchecked, 23.96ms Time], IncrementalHoareTripleChecker [1199 Valid, 1398 Invalid, 2 Unknown, 0 Unchecked, 7801.51ms Time] [2021-11-13 17:48:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-11-13 17:48:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6718. [2021-11-13 17:48:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 4957 states have (on average 1.3520274359491629) internal successors, (6702), 5105 states have internal predecessors, (6702), 1362 states have call successors, (1362), 327 states have call predecessors, (1362), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-11-13 17:48:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 9881 transitions. [2021-11-13 17:48:59,558 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 9881 transitions. Word has length 41 [2021-11-13 17:48:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:59,558 INFO L470 AbstractCegarLoop]: Abstraction has 6718 states and 9881 transitions. [2021-11-13 17:48:59,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:48:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 9881 transitions. [2021-11-13 17:48:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 17:48:59,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:59,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:59,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:48:59,561 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash 126580421, now seen corresponding path program 1 times [2021-11-13 17:48:59,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:59,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329337995] [2021-11-13 17:48:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:59,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:48:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:59,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:48:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:59,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:48:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:48:59,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:59,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329337995] [2021-11-13 17:48:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329337995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:59,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:59,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:48:59,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494078324] [2021-11-13 17:48:59,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:59,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:48:59,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:48:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:59,854 INFO L87 Difference]: Start difference. First operand 6718 states and 9881 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:49:01,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:04,014 WARN L515 Checker$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 17:49:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:06,082 INFO L93 Difference]: Finished difference Result 7587 states and 11286 transitions. [2021-11-13 17:49:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:06,083 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-11-13 17:49:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:06,126 INFO L225 Difference]: With dead ends: 7587 [2021-11-13 17:49:06,126 INFO L226 Difference]: Without dead ends: 7584 [2021-11-13 17:49:06,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:06,132 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 1781 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 698 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5572.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.69ms SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6021.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:06,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1876 Valid, 1882 Invalid, 1420 Unknown, 0 Unchecked, 10.69ms Time], IncrementalHoareTripleChecker [698 Valid, 720 Invalid, 2 Unknown, 0 Unchecked, 6021.35ms Time] [2021-11-13 17:49:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7584 states. [2021-11-13 17:49:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7584 to 6717. [2021-11-13 17:49:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 4957 states have (on average 1.3518257010288481) internal successors, (6701), 5104 states have internal predecessors, (6701), 1361 states have call successors, (1361), 327 states have call predecessors, (1361), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-11-13 17:49:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 9879 transitions. [2021-11-13 17:49:06,592 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 9879 transitions. Word has length 42 [2021-11-13 17:49:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:06,595 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 9879 transitions. [2021-11-13 17:49:06,595 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:49:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 9879 transitions. [2021-11-13 17:49:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:49:06,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:06,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:06,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:49:06,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash -371370760, now seen corresponding path program 1 times [2021-11-13 17:49:06,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:06,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282340270] [2021-11-13 17:49:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:06,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:06,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:49:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:49:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:49:06,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:06,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282340270] [2021-11-13 17:49:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282340270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:06,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:06,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:49:06,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391110675] [2021-11-13 17:49:06,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:06,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:06,909 INFO L87 Difference]: Start difference. First operand 6717 states and 9879 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:49:08,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:11,100 WARN L515 Checker$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 17:49:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:12,978 INFO L93 Difference]: Finished difference Result 7586 states and 11284 transitions. [2021-11-13 17:49:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-13 17:49:12,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:13,023 INFO L225 Difference]: With dead ends: 7586 [2021-11-13 17:49:13,023 INFO L226 Difference]: Without dead ends: 7574 [2021-11-13 17:49:13,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:13,027 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 1784 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 702 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5376.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.32ms SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5805.54ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:13,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 1872 Invalid, 1419 Unknown, 0 Unchecked, 9.32ms Time], IncrementalHoareTripleChecker [702 Valid, 715 Invalid, 2 Unknown, 0 Unchecked, 5805.54ms Time] [2021-11-13 17:49:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2021-11-13 17:49:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 6707. [2021-11-13 17:49:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 4948 states have (on average 1.3516572352465643) internal successors, (6688), 5094 states have internal predecessors, (6688), 1360 states have call successors, (1360), 327 states have call predecessors, (1360), 398 states have return successors, (1817), 1369 states have call predecessors, (1817), 1357 states have call successors, (1817) [2021-11-13 17:49:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 9865 transitions. [2021-11-13 17:49:13,387 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 9865 transitions. Word has length 43 [2021-11-13 17:49:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:13,387 INFO L470 AbstractCegarLoop]: Abstraction has 6707 states and 9865 transitions. [2021-11-13 17:49:13,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:49:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 9865 transitions. [2021-11-13 17:49:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 17:49:13,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:13,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:13,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:49:13,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -134116982, now seen corresponding path program 1 times [2021-11-13 17:49:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:13,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610753270] [2021-11-13 17:49:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:13,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:49:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 17:49:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:49:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 17:49:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:49:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 17:49:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:49:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:49:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:49:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:49:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:49:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 17:49:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 17:49:13,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:13,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610753270] [2021-11-13 17:49:13,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610753270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:13,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:13,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 17:49:13,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318947976] [2021-11-13 17:49:13,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:13,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:49:13,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:13,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:49:13,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:13,932 INFO L87 Difference]: Start difference. First operand 6707 states and 9865 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (17), 9 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 17:49:15,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:19,635 INFO L93 Difference]: Finished difference Result 16108 states and 23839 transitions. [2021-11-13 17:49:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:49:19,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (17), 9 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2021-11-13 17:49:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:19,680 INFO L225 Difference]: With dead ends: 16108 [2021-11-13 17:49:19,680 INFO L226 Difference]: Without dead ends: 9420 [2021-11-13 17:49:19,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:49:19,713 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 2390 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 1493 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4719.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.75ms SdHoareTripleChecker+Time, 1493 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5207.52ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:19,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2455 Valid, 3395 Invalid, 3057 Unknown, 0 Unchecked, 19.75ms Time], IncrementalHoareTripleChecker [1493 Valid, 1563 Invalid, 1 Unknown, 0 Unchecked, 5207.52ms Time] [2021-11-13 17:49:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-11-13 17:49:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 7983. [2021-11-13 17:49:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7983 states, 5905 states have (on average 1.3483488569009314) internal successors, (7962), 6083 states have internal predecessors, (7962), 1550 states have call successors, (1550), 352 states have call predecessors, (1550), 527 states have return successors, (2169), 1643 states have call predecessors, (2169), 1547 states have call successors, (2169) [2021-11-13 17:49:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7983 states to 7983 states and 11681 transitions. [2021-11-13 17:49:20,280 INFO L78 Accepts]: Start accepts. Automaton has 7983 states and 11681 transitions. Word has length 143 [2021-11-13 17:49:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:20,280 INFO L470 AbstractCegarLoop]: Abstraction has 7983 states and 11681 transitions. [2021-11-13 17:49:20,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (17), 9 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 17:49:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7983 states and 11681 transitions. [2021-11-13 17:49:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 17:49:20,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:20,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:20,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:49:20,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1543029914, now seen corresponding path program 1 times [2021-11-13 17:49:20,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:20,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419967928] [2021-11-13 17:49:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:20,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:49:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:49:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 17:49:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 17:49:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 17:49:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:49:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 17:49:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:49:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:49:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:49:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:49:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:49:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 17:49:21,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:21,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419967928] [2021-11-13 17:49:21,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419967928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:21,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384063810] [2021-11-13 17:49:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:21,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:21,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:21,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:49:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:49:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 17:49:22,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:49:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384063810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:22,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:49:22,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-13 17:49:22,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008161918] [2021-11-13 17:49:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:22,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:22,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:49:22,655 INFO L87 Difference]: Start difference. First operand 7983 states and 11681 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 17:49:24,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:49:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:25,793 INFO L93 Difference]: Finished difference Result 23983 states and 35141 transitions. [2021-11-13 17:49:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:49:25,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-13 17:49:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:25,859 INFO L225 Difference]: With dead ends: 23983 [2021-11-13 17:49:25,859 INFO L226 Difference]: Without dead ends: 16023 [2021-11-13 17:49:25,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-13 17:49:25,895 INFO L933 BasicCegarLoop]: 2213 mSDtfsCounter, 1438 mSDsluCounter, 5041 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 107 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2259.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 7254 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.12ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2433.87ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:25,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 7254 Invalid, 214 Unknown, 0 Unchecked, 13.12ms Time], IncrementalHoareTripleChecker [107 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 2433.87ms Time] [2021-11-13 17:49:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16023 states. [2021-11-13 17:49:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16023 to 8031. [2021-11-13 17:49:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8031 states, 5937 states have (on average 1.346471281792151) internal successors, (7994), 6107 states have internal predecessors, (7994), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 527 states have return successors, (2203), 1659 states have call predecessors, (2203), 1563 states have call successors, (2203) [2021-11-13 17:49:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8031 states to 8031 states and 11763 transitions. [2021-11-13 17:49:26,563 INFO L78 Accepts]: Start accepts. Automaton has 8031 states and 11763 transitions. Word has length 152 [2021-11-13 17:49:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:26,564 INFO L470 AbstractCegarLoop]: Abstraction has 8031 states and 11763 transitions. [2021-11-13 17:49:26,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 17:49:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8031 states and 11763 transitions. [2021-11-13 17:49:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 17:49:26,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:26,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:26,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 17:49:26,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 17:49:26,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash 531912664, now seen corresponding path program 1 times [2021-11-13 17:49:26,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:26,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149849041] [2021-11-13 17:49:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:26,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:49:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:49:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:49:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 17:49:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 17:49:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 17:49:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:49:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:49:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 17:49:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:49:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:49:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:49:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:49:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:49:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:49:27,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:27,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149849041] [2021-11-13 17:49:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149849041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:27,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002317073] [2021-11-13 17:49:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:27,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:27,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:27,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:50:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 17:50:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 17:50:50,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:50:50,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002317073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:50,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:50:50,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-11-13 17:50:50,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757051318] [2021-11-13 17:50:50,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:50,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:50:50,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:50:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-13 17:50:50,579 INFO L87 Difference]: Start difference. First operand 8031 states and 11763 transitions. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 9 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 17:50:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:52,397 INFO L93 Difference]: Finished difference Result 26089 states and 38615 transitions. [2021-11-13 17:50:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 17:50:52,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 9 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-13 17:50:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:52,485 INFO L225 Difference]: With dead ends: 26089 [2021-11-13 17:50:52,485 INFO L226 Difference]: Without dead ends: 18081 [2021-11-13 17:50:52,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 17:50:52,520 INFO L933 BasicCegarLoop]: 1460 mSDtfsCounter, 1644 mSDsluCounter, 14107 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 533.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 15567 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.56ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 590.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:52,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 15567 Invalid, 331 Unknown, 0 Unchecked, 32.56ms Time], IncrementalHoareTripleChecker [68 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 590.15ms Time] [2021-11-13 17:50:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18081 states. [2021-11-13 17:50:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18081 to 8095. [2021-11-13 17:50:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8095 states, 5989 states have (on average 1.3434630155284688) internal successors, (8046), 6155 states have internal predecessors, (8046), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 539 states have return successors, (2251), 1675 states have call predecessors, (2251), 1563 states have call successors, (2251) [2021-11-13 17:50:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8095 states to 8095 states and 11863 transitions. [2021-11-13 17:50:53,396 INFO L78 Accepts]: Start accepts. Automaton has 8095 states and 11863 transitions. Word has length 152 [2021-11-13 17:50:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:53,397 INFO L470 AbstractCegarLoop]: Abstraction has 8095 states and 11863 transitions. [2021-11-13 17:50:53,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 9 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 17:50:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8095 states and 11863 transitions. [2021-11-13 17:50:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-13 17:50:53,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:53,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:53,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:53,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:53,626 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2027720386, now seen corresponding path program 1 times [2021-11-13 17:50:53,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:53,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466883046] [2021-11-13 17:50:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:53,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:50:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:53,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:50:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:50:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 17:50:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:50:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 17:50:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:50:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:50:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 17:50:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:50:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:50:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 17:50:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:50:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:50:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:50:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:50:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:50:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:50:54,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:54,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466883046] [2021-11-13 17:50:54,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466883046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:54,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590669337] [2021-11-13 17:50:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:54,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:54,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:54,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:52:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:59,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 17:52:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:53:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 17:53:00,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:53:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590669337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:00,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:53:00,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-11-13 17:53:00,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409171893] [2021-11-13 17:53:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:00,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:53:00,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:53:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:53:00,254 INFO L87 Difference]: Start difference. First operand 8095 states and 11863 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 17:53:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:00,556 INFO L93 Difference]: Finished difference Result 16411 states and 24095 transitions. [2021-11-13 17:53:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:53:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 158 [2021-11-13 17:53:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:00,596 INFO L225 Difference]: With dead ends: 16411 [2021-11-13 17:53:00,596 INFO L226 Difference]: Without dead ends: 8339 [2021-11-13 17:53:00,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:53:00,620 INFO L933 BasicCegarLoop]: 1289 mSDtfsCounter, 256 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.34ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:00,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2273 Invalid, 1 Unknown, 0 Unchecked, 2.63ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.34ms Time] [2021-11-13 17:53:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2021-11-13 17:53:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 8095. [2021-11-13 17:53:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8095 states, 5989 states have (on average 1.3421272332609784) internal successors, (8038), 6147 states have internal predecessors, (8038), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 539 states have return successors, (2251), 1675 states have call predecessors, (2251), 1563 states have call successors, (2251) [2021-11-13 17:53:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8095 states to 8095 states and 11855 transitions. [2021-11-13 17:53:01,292 INFO L78 Accepts]: Start accepts. Automaton has 8095 states and 11855 transitions. Word has length 158 [2021-11-13 17:53:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:01,293 INFO L470 AbstractCegarLoop]: Abstraction has 8095 states and 11855 transitions. [2021-11-13 17:53:01,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 17:53:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 8095 states and 11855 transitions. [2021-11-13 17:53:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 17:53:01,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:01,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:01,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:53:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:01,527 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1646773846, now seen corresponding path program 1 times [2021-11-13 17:53:01,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:01,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262934169] [2021-11-13 17:53:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:01,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:53:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:53:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:01,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:53:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 17:53:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:53:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 17:53:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:53:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:53:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 17:53:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 17:53:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:53:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:53:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 17:53:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:53:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:53:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:53:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:53:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:53:02,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:02,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262934169] [2021-11-13 17:53:02,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262934169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:53:02,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521988580] [2021-11-13 17:53:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:02,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:53:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:02,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:53:02,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:55:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 3098 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 17:55:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 17:55:13,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:55:13,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521988580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:13,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:55:13,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-11-13 17:55:13,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076657592] [2021-11-13 17:55:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:13,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:55:13,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:55:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:55:13,478 INFO L87 Difference]: Start difference. First operand 8095 states and 11855 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:55:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:13,960 INFO L93 Difference]: Finished difference Result 16172 states and 23691 transitions. [2021-11-13 17:55:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:55:13,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 163 [2021-11-13 17:55:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:13,989 INFO L225 Difference]: With dead ends: 16172 [2021-11-13 17:55:13,989 INFO L226 Difference]: Without dead ends: 8096 [2021-11-13 17:55:14,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:55:14,013 INFO L933 BasicCegarLoop]: 1140 mSDtfsCounter, 2 mSDsluCounter, 2278 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:14,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3418 Invalid, 7 Unknown, 0 Unchecked, 4.57ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 12.61ms Time] [2021-11-13 17:55:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2021-11-13 17:55:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 8096. [2021-11-13 17:55:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8096 states, 5990 states have (on average 1.3420701168614357) internal successors, (8039), 6148 states have internal predecessors, (8039), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 539 states have return successors, (2251), 1675 states have call predecessors, (2251), 1563 states have call successors, (2251) [2021-11-13 17:55:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 11856 transitions. [2021-11-13 17:55:14,626 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 11856 transitions. Word has length 163 [2021-11-13 17:55:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:14,626 INFO L470 AbstractCegarLoop]: Abstraction has 8096 states and 11856 transitions. [2021-11-13 17:55:14,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:55:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 11856 transitions. [2021-11-13 17:55:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 17:55:14,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:14,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:14,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:14,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 17:55:14,844 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1248867271, now seen corresponding path program 1 times [2021-11-13 17:55:14,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:14,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976520753] [2021-11-13 17:55:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:14,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:55:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:55:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 17:55:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:55:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 17:55:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:55:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 17:55:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 17:55:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:55:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:55:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 17:55:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:55:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:55:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:55:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:55:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:55:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 17:55:15,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:55:15,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976520753] [2021-11-13 17:55:15,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976520753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:55:15,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005043034] [2021-11-13 17:55:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:15,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:55:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:55:15,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:55:15,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:55:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:54,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 3104 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 17:55:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:55:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 17:55:55,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:55:55,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005043034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:55,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:55:55,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-11-13 17:55:55,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799630462] [2021-11-13 17:55:55,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:55,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:55:55,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:55,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:55:55,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:55:55,375 INFO L87 Difference]: Start difference. First operand 8096 states and 11856 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:55:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:55,681 INFO L93 Difference]: Finished difference Result 16184 states and 24244 transitions. [2021-11-13 17:55:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:55:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 164 [2021-11-13 17:55:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:55,714 INFO L225 Difference]: With dead ends: 16184 [2021-11-13 17:55:55,714 INFO L226 Difference]: Without dead ends: 8096 [2021-11-13 17:55:55,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:55:55,742 INFO L933 BasicCegarLoop]: 1142 mSDtfsCounter, 0 mSDsluCounter, 3420 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4562 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.68ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:55,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4562 Invalid, 9 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 9.68ms Time] [2021-11-13 17:55:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2021-11-13 17:55:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 8096. [2021-11-13 17:55:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8096 states, 5990 states have (on average 1.3420701168614357) internal successors, (8039), 6148 states have internal predecessors, (8039), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 539 states have return successors, (2243), 1675 states have call predecessors, (2243), 1563 states have call successors, (2243) [2021-11-13 17:55:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 11848 transitions. [2021-11-13 17:55:56,425 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 11848 transitions. Word has length 164 [2021-11-13 17:55:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:56,425 INFO L470 AbstractCegarLoop]: Abstraction has 8096 states and 11848 transitions. [2021-11-13 17:55:56,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 17:55:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 11848 transitions. [2021-11-13 17:55:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 17:55:56,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:56,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:56,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:55:56,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 17:55:56,653 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1572964961, now seen corresponding path program 2 times [2021-11-13 17:55:56,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:56,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879694133] [2021-11-13 17:55:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:56,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:56,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:56,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:55:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:56,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:55:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 17:55:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:55:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:55:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:55:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:55:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:55:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:55:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:55:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 17:55:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:55:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:55:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:55:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:55:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:55:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 17:55:57,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:55:57,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879694133] [2021-11-13 17:55:57,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879694133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:57,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:57,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 17:55:57,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506606244] [2021-11-13 17:55:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:57,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:55:57,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:55:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:55:57,404 INFO L87 Difference]: Start difference. First operand 8096 states and 11848 transitions. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (19), 10 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 17:55:59,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:01,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:03,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:09,318 INFO L93 Difference]: Finished difference Result 17478 states and 25808 transitions. [2021-11-13 17:56:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:56:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (19), 10 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 170 [2021-11-13 17:56:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:09,354 INFO L225 Difference]: With dead ends: 17478 [2021-11-13 17:56:09,354 INFO L226 Difference]: Without dead ends: 9406 [2021-11-13 17:56:09,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:56:09,376 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 2943 mSDsluCounter, 4591 mSDsCounter, 0 mSdLazyCounter, 2546 mSolverCounterSat, 2154 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10160.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 5595 SdHoareTripleChecker+Invalid, 4703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.01ms SdHoareTripleChecker+Time, 2154 IncrementalHoareTripleChecker+Valid, 2546 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11022.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:09,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 5595 Invalid, 4703 Unknown, 0 Unchecked, 35.01ms Time], IncrementalHoareTripleChecker [2154 Valid, 2546 Invalid, 3 Unknown, 0 Unchecked, 11022.73ms Time] [2021-11-13 17:56:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9406 states. [2021-11-13 17:56:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9406 to 8136. [2021-11-13 17:56:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8136 states, 6022 states have (on average 1.3415808701428098) internal successors, (8079), 6172 states have internal predecessors, (8079), 1574 states have call successors, (1574), 352 states have call predecessors, (1574), 539 states have return successors, (2251), 1691 states have call predecessors, (2251), 1571 states have call successors, (2251) [2021-11-13 17:56:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8136 states to 8136 states and 11904 transitions. [2021-11-13 17:56:10,037 INFO L78 Accepts]: Start accepts. Automaton has 8136 states and 11904 transitions. Word has length 170 [2021-11-13 17:56:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:10,038 INFO L470 AbstractCegarLoop]: Abstraction has 8136 states and 11904 transitions. [2021-11-13 17:56:10,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 4 states have internal predecessors, (113), 3 states have call successors, (19), 10 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 17:56:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8136 states and 11904 transitions. [2021-11-13 17:56:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 17:56:10,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:10,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:10,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:56:10,052 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash -933269753, now seen corresponding path program 1 times [2021-11-13 17:56:10,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:56:10,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137477245] [2021-11-13 17:56:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:10,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:56:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:56:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:56:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 17:56:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:56:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:56:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:56:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:56:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 17:56:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:56:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:56:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:56:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:56:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:56:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 17:56:10,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:56:10,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137477245] [2021-11-13 17:56:10,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137477245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:56:10,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339544611] [2021-11-13 17:56:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:10,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:56:10,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:56:10,881 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:56:10,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:56:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 3148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 17:56:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:56:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 17:56:20,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:56:20,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339544611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:20,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:56:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2021-11-13 17:56:20,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140184871] [2021-11-13 17:56:20,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:20,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:56:20,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:56:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:56:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-13 17:56:20,108 INFO L87 Difference]: Start difference. First operand 8136 states and 11904 transitions. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 9 states have internal predecessors, (114), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 17:56:22,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:24,023 INFO L93 Difference]: Finished difference Result 18952 states and 28183 transitions. [2021-11-13 17:56:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 17:56:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 9 states have internal predecessors, (114), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 4 states have call successors, (19) Word has length 176 [2021-11-13 17:56:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:24,070 INFO L225 Difference]: With dead ends: 18952 [2021-11-13 17:56:24,070 INFO L226 Difference]: Without dead ends: 10840 [2021-11-13 17:56:24,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 17:56:24,093 INFO L933 BasicCegarLoop]: 2221 mSDtfsCounter, 2480 mSDsluCounter, 19180 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 201 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2713.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2522 SdHoareTripleChecker+Valid, 21401 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.46ms SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2951.44ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:24,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2522 Valid, 21401 Invalid, 773 Unknown, 0 Unchecked, 26.46ms Time], IncrementalHoareTripleChecker [201 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 2951.44ms Time] [2021-11-13 17:56:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10840 states. [2021-11-13 17:56:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10840 to 8103. [2021-11-13 17:56:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8103 states, 5997 states have (on average 1.3408370852092713) internal successors, (8041), 6147 states have internal predecessors, (8041), 1566 states have call successors, (1566), 352 states have call predecessors, (1566), 539 states have return successors, (2243), 1683 states have call predecessors, (2243), 1563 states have call successors, (2243) [2021-11-13 17:56:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8103 states to 8103 states and 11850 transitions. [2021-11-13 17:56:24,808 INFO L78 Accepts]: Start accepts. Automaton has 8103 states and 11850 transitions. Word has length 176 [2021-11-13 17:56:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:24,809 INFO L470 AbstractCegarLoop]: Abstraction has 8103 states and 11850 transitions. [2021-11-13 17:56:24,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 9 states have internal predecessors, (114), 4 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 17:56:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8103 states and 11850 transitions. [2021-11-13 17:56:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-13 17:56:24,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:24,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:24,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:56:25,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 17:56:25,041 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1055633972, now seen corresponding path program 1 times [2021-11-13 17:56:25,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:56:25,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193788001] [2021-11-13 17:56:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:25,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:56:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:56:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:56:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 17:56:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:56:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:56:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:56:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:56:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-13 17:56:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:56:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 17:56:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:56:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:56:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:56:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:56:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:26,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:56:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 17:56:26,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:56:26,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193788001] [2021-11-13 17:56:26,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193788001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:56:26,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109250965] [2021-11-13 17:56:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:26,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:56:26,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:56:26,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:56:26,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:58:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 3243 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:58:57,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:58:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 17:58:57,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:58:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 17:58:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109250965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:58:58,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:58:58,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 21 [2021-11-13 17:58:58,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285060195] [2021-11-13 17:58:58,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:58:58,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 17:58:58,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 17:58:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:58:58,395 INFO L87 Difference]: Start difference. First operand 8103 states and 11850 transitions. Second operand has 21 states, 21 states have (on average 10.857142857142858) internal successors, (228), 13 states have internal predecessors, (228), 4 states have call successors, (54), 10 states have call predecessors, (54), 5 states have return successors, (46), 5 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-13 17:59:00,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:02,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:04,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:59:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:59:18,827 INFO L93 Difference]: Finished difference Result 18431 states and 27411 transitions. [2021-11-13 17:59:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 17:59:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 10.857142857142858) internal successors, (228), 13 states have internal predecessors, (228), 4 states have call successors, (54), 10 states have call predecessors, (54), 5 states have return successors, (46), 5 states have call predecessors, (46), 4 states have call successors, (46) Word has length 196 [2021-11-13 17:59:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:59:18,857 INFO L225 Difference]: With dead ends: 18431 [2021-11-13 17:59:18,857 INFO L226 Difference]: Without dead ends: 10346 [2021-11-13 17:59:18,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 17:59:18,871 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 7226 mSDsluCounter, 10168 mSDsCounter, 0 mSdLazyCounter, 7398 mSolverCounterSat, 4564 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16734.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7324 SdHoareTripleChecker+Valid, 11480 SdHoareTripleChecker+Invalid, 11965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 98.90ms SdHoareTripleChecker+Time, 4564 IncrementalHoareTripleChecker+Valid, 7398 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18403.58ms IncrementalHoareTripleChecker+Time [2021-11-13 17:59:18,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7324 Valid, 11480 Invalid, 11965 Unknown, 0 Unchecked, 98.90ms Time], IncrementalHoareTripleChecker [4564 Valid, 7398 Invalid, 3 Unknown, 0 Unchecked, 18403.58ms Time] [2021-11-13 17:59:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10346 states. [2021-11-13 17:59:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10346 to 7838. [2021-11-13 17:59:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7838 states, 5812 states have (on average 1.3406744666207846) internal successors, (7792), 5954 states have internal predecessors, (7792), 1492 states have call successors, (1492), 348 states have call predecessors, (1492), 533 states have return successors, (2145), 1615 states have call predecessors, (2145), 1489 states have call successors, (2145) [2021-11-13 17:59:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7838 states to 7838 states and 11429 transitions. [2021-11-13 17:59:19,524 INFO L78 Accepts]: Start accepts. Automaton has 7838 states and 11429 transitions. Word has length 196 [2021-11-13 17:59:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:59:19,524 INFO L470 AbstractCegarLoop]: Abstraction has 7838 states and 11429 transitions. [2021-11-13 17:59:19,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.857142857142858) internal successors, (228), 13 states have internal predecessors, (228), 4 states have call successors, (54), 10 states have call predecessors, (54), 5 states have return successors, (46), 5 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-13 17:59:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7838 states and 11429 transitions. [2021-11-13 17:59:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 17:59:19,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:59:19,537 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:59:19,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 17:59:19,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:59:19,753 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:59:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:59:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1991704043, now seen corresponding path program 2 times [2021-11-13 17:59:19,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:59:19,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545939095] [2021-11-13 17:59:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:59:19,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:59:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:59:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 17:59:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 17:59:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 17:59:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:59:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:59:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 17:59:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:59:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:59:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 17:59:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:59:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:59:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:59:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:59:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 17:59:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:59:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:59:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 17:59:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:59:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:59:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:59:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 17:59:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:59:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:59:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 17:59:21,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:59:21,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545939095] [2021-11-13 17:59:21,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545939095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:59:21,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935267696] [2021-11-13 17:59:21,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:59:21,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:59:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:59:21,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:59:21,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1902fbc7-0546-45a2-bf2e-3e4759b7e5f6/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process