./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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 6985379bcc34be713545a774d70e5414e9690ba41356ad39bb00629a60c9ae14 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:46:12,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:46:12,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:46:12,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:46:12,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:46:12,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:46:12,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:46:12,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:46:12,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:46:12,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:46:12,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:46:12,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:46:12,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:46:12,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:46:12,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:46:12,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:46:12,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:46:12,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:46:12,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:46:12,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:46:12,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:46:12,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:46:12,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:46:12,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:46:12,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:46:12,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:46:12,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:46:12,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:46:12,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:46:12,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:46:12,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:46:12,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:46:12,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:46:12,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:46:12,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:46:12,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:46:12,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:46:12,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:46:12,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:46:12,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:46:12,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:46:12,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:46:12,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:46:12,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:46:12,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:46:12,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:46:12,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:46:12,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:46:12,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:46:12,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:46:12,993 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:46:12,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:46:12,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:46:12,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:46:12,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:46:12,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:46:12,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:46:12,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:46:12,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:46:12,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:46:12,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:46:12,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:46:12,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:46:12,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:12,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:46:12,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:46:12,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:46:12,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:46:12,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:46:12,998 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:46:12,999 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:46:12,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:46:12,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:46:12,999 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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6985379bcc34be713545a774d70e5414e9690ba41356ad39bb00629a60c9ae14 [2021-11-13 18:46:13,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:46:13,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:46:13,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:46:13,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:46:13,349 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:46:13,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2021-11-13 18:46:13,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/e9172c162/43f7f53d2a25496399b05f675348a683/FLAG5c10bb695 [2021-11-13 18:46:14,544 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:46:14,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2021-11-13 18:46:14,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/e9172c162/43f7f53d2a25496399b05f675348a683/FLAG5c10bb695 [2021-11-13 18:46:14,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/e9172c162/43f7f53d2a25496399b05f675348a683 [2021-11-13 18:46:14,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:46:14,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:46:14,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:14,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:46:14,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:46:14,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:14" (1/1) ... [2021-11-13 18:46:14,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353f6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:14, skipping insertion in model container [2021-11-13 18:46:14,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:14" (1/1) ... [2021-11-13 18:46:14,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:46:15,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:16,414 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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i[160997,161010] [2021-11-13 18:46:17,160 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 18:46:17,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:17,209 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:46:17,417 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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i[160997,161010] [2021-11-13 18:46:17,634 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 18:46:17,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:17,721 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:46:17,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17 WrapperNode [2021-11-13 18:46:17,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:17,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:17,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:46:17,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:46:17,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:17,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:18,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:46:18,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:46:18,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:46:18,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:46:18,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:46:18,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:46:18,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:46:18,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (1/1) ... [2021-11-13 18:46:18,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:18,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:18,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:46:18,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:46:18,453 INFO L130 BoogieDeclarations]: Found specification of procedure broadcast_write [2021-11-13 18:46:18,454 INFO L138 BoogieDeclarations]: Found implementation of procedure broadcast_write [2021-11-13 18:46:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-13 18:46:18,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-13 18:46:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure genphy_config_aneg [2021-11-13 18:46:18,455 INFO L138 BoogieDeclarations]: Found implementation of procedure genphy_config_aneg [2021-11-13 18:46:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-13 18:46:18,455 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-13 18:46:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_clock_put [2021-11-13 18:46:18,456 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_clock_put [2021-11-13 18:46:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:46:18,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:46:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:46:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2021-11-13 18:46:18,457 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2021-11-13 18:46:18,457 INFO L130 BoogieDeclarations]: Found specification of procedure phy2txts [2021-11-13 18:46:18,457 INFO L138 BoogieDeclarations]: Found implementation of procedure phy2txts [2021-11-13 18:46:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-13 18:46:18,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-13 18:46:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_ts_info [2021-11-13 18:46:18,459 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_ts_info [2021-11-13 18:46:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:46:18,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:46:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_destroy [2021-11-13 18:46:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_destroy [2021-11-13 18:46:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_write [2021-11-13 18:46:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_write [2021-11-13 18:46:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_config_intr [2021-11-13 18:46:18,461 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_config_intr [2021-11-13 18:46:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure tdr_write [2021-11-13 18:46:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure tdr_write [2021-11-13 18:46:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-13 18:46:18,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-13 18:46:18,462 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:46:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:46:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure exts_chan_to_edata [2021-11-13 18:46:18,463 INFO L138 BoogieDeclarations]: Found implementation of procedure exts_chan_to_edata [2021-11-13 18:46:18,463 INFO L130 BoogieDeclarations]: Found specification of procedure skb_complete_tx_timestamp [2021-11-13 18:46:18,464 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_complete_tx_timestamp [2021-11-13 18:46:18,464 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-13 18:46:18,464 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-13 18:46:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-13 18:46:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-13 18:46:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:46:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:46:18,466 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:46:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:46:18,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:46:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_rxtstamp [2021-11-13 18:46:18,467 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_rxtstamp [2021-11-13 18:46:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:46:18,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:46:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure phy_read [2021-11-13 18:46:18,468 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_read [2021-11-13 18:46:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:46:18,469 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:46:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:46:18,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:46:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:46:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure prune_rx_ts [2021-11-13 18:46:18,472 INFO L138 BoogieDeclarations]: Found implementation of procedure prune_rx_ts [2021-11-13 18:46:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:46:18,472 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:46:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-13 18:46:18,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-13 18:46:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_config_init [2021-11-13 18:46:18,474 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_config_init [2021-11-13 18:46:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:46:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:46:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 18:46:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 18:46:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 18:46:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure ns_to_ktime [2021-11-13 18:46:18,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_to_ktime [2021-11-13 18:46:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-13 18:46:18,476 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-13 18:46:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:46:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-13 18:46:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-13 18:46:18,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-13 18:46:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-13 18:46:18,477 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-13 18:46:18,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 18:46:18,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 18:46:18,478 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:46:18,478 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:46:18,478 INFO L130 BoogieDeclarations]: Found specification of procedure enable_status_frames [2021-11-13 18:46:18,479 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_status_frames [2021-11-13 18:46:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_hwtstamp [2021-11-13 18:46:18,480 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_hwtstamp [2021-11-13 18:46:18,480 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-13 18:46:18,480 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-13 18:46:18,481 INFO L130 BoogieDeclarations]: Found specification of procedure phy_write [2021-11-13 18:46:18,481 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_write [2021-11-13 18:46:18,481 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-13 18:46:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-13 18:46:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:46:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:46:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-11-13 18:46:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-11-13 18:46:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:46:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:46:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_clock_get [2021-11-13 18:46:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_clock_get [2021-11-13 18:46:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_ack_interrupt [2021-11-13 18:46:18,485 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_ack_interrupt [2021-11-13 18:46:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure ext_read [2021-11-13 18:46:18,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ext_read [2021-11-13 18:46:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-13 18:46:18,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-13 18:46:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:46:18,487 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:46:18,487 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:46:18,487 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:46:18,487 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:46:18,487 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:46:18,488 INFO L130 BoogieDeclarations]: Found specification of procedure skb_mac_header [2021-11-13 18:46:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_mac_header [2021-11-13 18:46:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_txtstamp [2021-11-13 18:46:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_txtstamp [2021-11-13 18:46:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:46:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure enable_broadcast [2021-11-13 18:46:18,495 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_broadcast [2021-11-13 18:46:18,496 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:46:18,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:46:18,497 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:46:18,497 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:46:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:46:18,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:46:18,503 INFO L130 BoogieDeclarations]: Found specification of procedure ns_to_timespec [2021-11-13 18:46:18,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_to_timespec [2021-11-13 18:46:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure ext_write [2021-11-13 18:46:18,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ext_write [2021-11-13 18:46:18,504 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-13 18:46:18,504 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-13 18:46:19,561 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:46:22,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:46:22,471 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:46:22,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:22 BoogieIcfgContainer [2021-11-13 18:46:22,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:46:22,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:46:22,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:46:22,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:46:22,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:46:14" (1/3) ... [2021-11-13 18:46:22,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6479b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:22, skipping insertion in model container [2021-11-13 18:46:22,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:17" (2/3) ... [2021-11-13 18:46:22,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6479b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:22, skipping insertion in model container [2021-11-13 18:46:22,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:22" (3/3) ... [2021-11-13 18:46:22,494 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2021-11-13 18:46:22,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:46:22,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:46:22,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:46:22,632 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:46:22,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:46:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 826 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 588 states have internal predecessors, (750), 193 states have call successors, (193), 61 states have call predecessors, (193), 60 states have return successors, (190), 189 states have call predecessors, (190), 190 states have call successors, (190) [2021-11-13 18:46:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:46:22,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:22,739 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] [2021-11-13 18:46:22,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1130854638, now seen corresponding path program 1 times [2021-11-13 18:46:22,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:22,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635317239] [2021-11-13 18:46:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:22,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:46:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:23,597 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 18:46:23,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:23,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635317239] [2021-11-13 18:46:23,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635317239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:23,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:23,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:46:23,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405978742] [2021-11-13 18:46:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:23,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:46:23,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:46:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:23,650 INFO L87 Difference]: Start difference. First operand has 826 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 588 states have internal predecessors, (750), 193 states have call successors, (193), 61 states have call predecessors, (193), 60 states have return successors, (190), 189 states have call predecessors, (190), 190 states have call successors, (190) Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 18:46:29,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:30,500 INFO L93 Difference]: Finished difference Result 2630 states and 3786 transitions. [2021-11-13 18:46:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 32 [2021-11-13 18:46:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:30,566 INFO L225 Difference]: With dead ends: 2630 [2021-11-13 18:46:30,567 INFO L226 Difference]: Without dead ends: 1763 [2021-11-13 18:46:30,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:46:30,595 INFO L933 BasicCegarLoop]: 1229 mSDtfsCounter, 1569 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5493.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 97.01ms SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6237.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:30,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 4555 Invalid, 2198 Unknown, 0 Unchecked, 97.01ms Time], IncrementalHoareTripleChecker [583 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 6237.06ms Time] [2021-11-13 18:46:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-13 18:46:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1601. [2021-11-13 18:46:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1111 states have (on average 1.297929792979298) internal successors, (1442), 1136 states have internal predecessors, (1442), 370 states have call successors, (370), 118 states have call predecessors, (370), 119 states have return successors, (383), 368 states have call predecessors, (383), 369 states have call successors, (383) [2021-11-13 18:46:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2195 transitions. [2021-11-13 18:46:30,907 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2195 transitions. Word has length 32 [2021-11-13 18:46:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 2195 transitions. [2021-11-13 18:46:30,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 18:46:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2195 transitions. [2021-11-13 18:46:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:46:30,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:30,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:30,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:46:30,928 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1456852114, now seen corresponding path program 1 times [2021-11-13 18:46:30,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:30,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994126295] [2021-11-13 18:46:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:30,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:46:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:46:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:46:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:46:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:46:31,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:31,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994126295] [2021-11-13 18:46:31,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994126295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:31,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:31,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:46:31,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458261036] [2021-11-13 18:46:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:31,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:46:31,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:46:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:31,302 INFO L87 Difference]: Start difference. First operand 1601 states and 2195 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:46:36,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:38,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:39,288 INFO L93 Difference]: Finished difference Result 3585 states and 5064 transitions. [2021-11-13 18:46:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:46:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2021-11-13 18:46:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:39,318 INFO L225 Difference]: With dead ends: 3585 [2021-11-13 18:46:39,319 INFO L226 Difference]: Without dead ends: 1992 [2021-11-13 18:46:39,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:39,332 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 1016 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 824 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7041.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.56ms SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7655.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:39,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 2454 Invalid, 2252 Unknown, 0 Unchecked, 44.56ms Time], IncrementalHoareTripleChecker [824 Valid, 1427 Invalid, 1 Unknown, 0 Unchecked, 7655.83ms Time] [2021-11-13 18:46:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-11-13 18:46:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1702. [2021-11-13 18:46:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1188 states have (on average 1.2971380471380471) internal successors, (1541), 1216 states have internal predecessors, (1541), 382 states have call successors, (382), 127 states have call predecessors, (382), 131 states have return successors, (401), 380 states have call predecessors, (401), 381 states have call successors, (401) [2021-11-13 18:46:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2324 transitions. [2021-11-13 18:46:39,545 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2324 transitions. Word has length 77 [2021-11-13 18:46:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:39,545 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2324 transitions. [2021-11-13 18:46:39,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:46:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2324 transitions. [2021-11-13 18:46:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:46:39,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:39,555 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:39,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:46:39,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1040348853, now seen corresponding path program 1 times [2021-11-13 18:46:39,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:39,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731185528] [2021-11-13 18:46:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:39,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:46:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:46:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:46:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-13 18:46:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:39,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:46:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:46:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:46:40,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:40,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731185528] [2021-11-13 18:46:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731185528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:40,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:40,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:46:40,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243149501] [2021-11-13 18:46:40,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:40,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:46:40,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:46:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:40,038 INFO L87 Difference]: Start difference. First operand 1702 states and 2324 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:46:46,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:48,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:46:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:50,201 INFO L93 Difference]: Finished difference Result 5174 states and 7332 transitions. [2021-11-13 18:46:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:46:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 101 [2021-11-13 18:46:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:50,237 INFO L225 Difference]: With dead ends: 5174 [2021-11-13 18:46:50,237 INFO L226 Difference]: Without dead ends: 3501 [2021-11-13 18:46:50,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:46:50,254 INFO L933 BasicCegarLoop]: 1195 mSDtfsCounter, 2523 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 1607 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8805.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2683 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.55ms SdHoareTripleChecker+Time, 1607 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9664.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:50,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2683 Valid, 2475 Invalid, 3429 Unknown, 0 Unchecked, 50.55ms Time], IncrementalHoareTripleChecker [1607 Valid, 1821 Invalid, 1 Unknown, 0 Unchecked, 9664.91ms Time] [2021-11-13 18:46:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2021-11-13 18:46:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2946. [2021-11-13 18:46:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2072 states have (on average 1.2866795366795367) internal successors, (2666), 2114 states have internal predecessors, (2666), 630 states have call successors, (630), 234 states have call predecessors, (630), 243 states have return successors, (657), 627 states have call predecessors, (657), 629 states have call successors, (657) [2021-11-13 18:46:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 3953 transitions. [2021-11-13 18:46:50,515 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 3953 transitions. Word has length 101 [2021-11-13 18:46:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:50,517 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 3953 transitions. [2021-11-13 18:46:50,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:46:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 3953 transitions. [2021-11-13 18:46:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:46:50,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:50,528 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:50,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:46:50,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2025083819, now seen corresponding path program 1 times [2021-11-13 18:46:50,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:50,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310878921] [2021-11-13 18:46:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:50,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:46:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:46:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:46:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:46:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:46:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:46:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:46:50,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:50,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310878921] [2021-11-13 18:46:50,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310878921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:50,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:50,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:46:50,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049718495] [2021-11-13 18:46:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:50,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:46:50,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:46:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:50,920 INFO L87 Difference]: Start difference. First operand 2946 states and 3953 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:46:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:56,104 INFO L93 Difference]: Finished difference Result 5025 states and 7069 transitions. [2021-11-13 18:46:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:46:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 101 [2021-11-13 18:46:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:56,142 INFO L225 Difference]: With dead ends: 5025 [2021-11-13 18:46:56,142 INFO L226 Difference]: Without dead ends: 3496 [2021-11-13 18:46:56,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:56,153 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 908 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4306.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.36ms SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4858.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:56,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 2440 Invalid, 2122 Unknown, 0 Unchecked, 32.36ms Time], IncrementalHoareTripleChecker [792 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 4858.51ms Time] [2021-11-13 18:46:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-13 18:46:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2950. [2021-11-13 18:46:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2076 states have (on average 1.2861271676300579) internal successors, (2670), 2118 states have internal predecessors, (2670), 630 states have call successors, (630), 234 states have call predecessors, (630), 243 states have return successors, (657), 627 states have call predecessors, (657), 629 states have call successors, (657) [2021-11-13 18:46:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 3957 transitions. [2021-11-13 18:46:56,453 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 3957 transitions. Word has length 101 [2021-11-13 18:46:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:56,454 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 3957 transitions. [2021-11-13 18:46:56,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:46:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 3957 transitions. [2021-11-13 18:46:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:46:56,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:56,479 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:46:56,480 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash -383645622, now seen corresponding path program 1 times [2021-11-13 18:46:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:56,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244168164] [2021-11-13 18:46:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:56,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:46:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:46:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:46:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:46:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:46:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:46:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:46:56,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:56,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244168164] [2021-11-13 18:46:57,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244168164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:57,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:57,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-13 18:46:57,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159954318] [2021-11-13 18:46:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:57,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:46:57,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:57,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:46:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:57,015 INFO L87 Difference]: Start difference. First operand 2950 states and 3957 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 8 states have internal predecessors, (76), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:47:07,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:08,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:10,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:13,578 INFO L93 Difference]: Finished difference Result 7117 states and 9910 transitions. [2021-11-13 18:47:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:47:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 8 states have internal predecessors, (76), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) Word has length 103 [2021-11-13 18:47:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:13,622 INFO L225 Difference]: With dead ends: 7117 [2021-11-13 18:47:13,622 INFO L226 Difference]: Without dead ends: 4196 [2021-11-13 18:47:13,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:47:13,639 INFO L933 BasicCegarLoop]: 1150 mSDtfsCounter, 2284 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 7482 mSolverCounterSat, 1292 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14430.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 8775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.47ms SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 7482 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15944.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:13,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2558 Valid, 4336 Invalid, 8775 Unknown, 0 Unchecked, 72.47ms Time], IncrementalHoareTripleChecker [1292 Valid, 7482 Invalid, 1 Unknown, 0 Unchecked, 15944.38ms Time] [2021-11-13 18:47:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-11-13 18:47:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3490. [2021-11-13 18:47:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 2456 states have (on average 1.278501628664495) internal successors, (3140), 2506 states have internal predecessors, (3140), 752 states have call successors, (752), 276 states have call predecessors, (752), 281 states have return successors, (777), 745 states have call predecessors, (777), 751 states have call successors, (777) [2021-11-13 18:47:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 4669 transitions. [2021-11-13 18:47:13,953 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 4669 transitions. Word has length 103 [2021-11-13 18:47:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:13,953 INFO L470 AbstractCegarLoop]: Abstraction has 3490 states and 4669 transitions. [2021-11-13 18:47:13,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 8 states have internal predecessors, (76), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:47:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 4669 transitions. [2021-11-13 18:47:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 18:47:13,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:13,965 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:13,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:47:13,966 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:13,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1730679408, now seen corresponding path program 1 times [2021-11-13 18:47:13,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:13,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162518998] [2021-11-13 18:47:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:13,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:47:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:47:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:47:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:47:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 18:47:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:47:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:47:14,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:14,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162518998] [2021-11-13 18:47:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162518998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:14,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:47:14,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594738182] [2021-11-13 18:47:14,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:14,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:47:14,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:47:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:47:14,496 INFO L87 Difference]: Start difference. First operand 3490 states and 4669 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:47:19,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:21,381 INFO L93 Difference]: Finished difference Result 7571 states and 10519 transitions. [2021-11-13 18:47:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:47:21,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 129 [2021-11-13 18:47:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:21,419 INFO L225 Difference]: With dead ends: 7571 [2021-11-13 18:47:21,420 INFO L226 Difference]: Without dead ends: 4110 [2021-11-13 18:47:21,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:47:21,438 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 873 mSDsluCounter, 2956 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5929.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 3963 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.72ms SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6558.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:21,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 3963 Invalid, 2925 Unknown, 0 Unchecked, 37.72ms Time], IncrementalHoareTripleChecker [803 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 6558.46ms Time] [2021-11-13 18:47:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-11-13 18:47:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3518. [2021-11-13 18:47:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 2476 states have (on average 1.2762520193861067) internal successors, (3160), 2528 states have internal predecessors, (3160), 752 states have call successors, (752), 276 states have call predecessors, (752), 289 states have return successors, (789), 751 states have call predecessors, (789), 751 states have call successors, (789) [2021-11-13 18:47:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 4701 transitions. [2021-11-13 18:47:21,702 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 4701 transitions. Word has length 129 [2021-11-13 18:47:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 3518 states and 4701 transitions. [2021-11-13 18:47:21,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:47:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 4701 transitions. [2021-11-13 18:47:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 18:47:21,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:21,719 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-13 18:47:21,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:47:21,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1502778086, now seen corresponding path program 1 times [2021-11-13 18:47:21,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:21,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322397005] [2021-11-13 18:47:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:21,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:47:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:47:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:47:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:47:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:47:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:47:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:47:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:47:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:47:22,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:22,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322397005] [2021-11-13 18:47:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322397005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:22,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:22,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:47:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026173444] [2021-11-13 18:47:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:22,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:47:22,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:47:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:47:22,253 INFO L87 Difference]: Start difference. First operand 3518 states and 4701 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (16), 5 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:47:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:27,078 INFO L93 Difference]: Finished difference Result 7580 states and 10454 transitions. [2021-11-13 18:47:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:47:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (16), 5 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2021-11-13 18:47:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:27,111 INFO L225 Difference]: With dead ends: 7580 [2021-11-13 18:47:27,111 INFO L226 Difference]: Without dead ends: 4078 [2021-11-13 18:47:27,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:47:27,125 INFO L933 BasicCegarLoop]: 1040 mSDtfsCounter, 1875 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4108.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.63ms SdHoareTripleChecker+Time, 1036 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4539.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:27,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2005 Valid, 1753 Invalid, 2016 Unknown, 0 Unchecked, 18.63ms Time], IncrementalHoareTripleChecker [1036 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 4539.70ms Time] [2021-11-13 18:47:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-11-13 18:47:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3494. [2021-11-13 18:47:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 2454 states have (on average 1.2709861450692748) internal successors, (3119), 2506 states have internal predecessors, (3119), 750 states have call successors, (750), 276 states have call predecessors, (750), 289 states have return successors, (785), 749 states have call predecessors, (785), 749 states have call successors, (785) [2021-11-13 18:47:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 4654 transitions. [2021-11-13 18:47:27,408 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 4654 transitions. Word has length 150 [2021-11-13 18:47:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:27,410 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 4654 transitions. [2021-11-13 18:47:27,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (16), 5 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:47:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 4654 transitions. [2021-11-13 18:47:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-13 18:47:27,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:27,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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 18:47:27,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:47:27,424 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1027987929, now seen corresponding path program 1 times [2021-11-13 18:47:27,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:27,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375393934] [2021-11-13 18:47:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:27,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:47:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:47:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:47:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:47:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:47:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:47:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:47:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:47:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 18:47:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:47:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:47:28,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:28,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375393934] [2021-11-13 18:47:28,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375393934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:28,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918147711] [2021-11-13 18:47:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:28,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:28,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:28,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:47:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:47:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:47:29,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:47:30,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918147711] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:30,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:30,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 8] total 22 [2021-11-13 18:47:30,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248861225] [2021-11-13 18:47:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:30,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:47:30,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:47:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:47:30,788 INFO L87 Difference]: Start difference. First operand 3494 states and 4654 transitions. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-13 18:47:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:37,229 INFO L93 Difference]: Finished difference Result 8206 states and 11201 transitions. [2021-11-13 18:47:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:47:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 158 [2021-11-13 18:47:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:37,271 INFO L225 Difference]: With dead ends: 8206 [2021-11-13 18:47:37,271 INFO L226 Difference]: Without dead ends: 6126 [2021-11-13 18:47:37,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:47:37,284 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 4177 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 2030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4941.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4311 SdHoareTripleChecker+Valid, 3521 SdHoareTripleChecker+Invalid, 5836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.81ms SdHoareTripleChecker+Time, 2030 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5820.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:37,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4311 Valid, 3521 Invalid, 5836 Unknown, 0 Unchecked, 44.81ms Time], IncrementalHoareTripleChecker [2030 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 5820.24ms Time] [2021-11-13 18:47:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-11-13 18:47:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 5092. [2021-11-13 18:47:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 3569 states have (on average 1.2729055757915382) internal successors, (4543), 3652 states have internal predecessors, (4543), 1100 states have call successors, (1100), 389 states have call predecessors, (1100), 422 states have return successors, (1192), 1105 states have call predecessors, (1192), 1099 states have call successors, (1192) [2021-11-13 18:47:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 6835 transitions. [2021-11-13 18:47:37,801 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 6835 transitions. Word has length 158 [2021-11-13 18:47:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:37,802 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 6835 transitions. [2021-11-13 18:47:37,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-13 18:47:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 6835 transitions. [2021-11-13 18:47:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 18:47:37,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:37,817 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:37,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:47:38,036 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1503595608, now seen corresponding path program 1 times [2021-11-13 18:47:38,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:38,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425574387] [2021-11-13 18:47:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:38,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:47:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:47:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:47:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:47:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:47:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:47:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:47:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:47:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:47:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:47:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:47:38,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:38,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425574387] [2021-11-13 18:47:38,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425574387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:38,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:38,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:47:38,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233242065] [2021-11-13 18:47:38,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:38,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:47:38,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:47:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:47:38,467 INFO L87 Difference]: Start difference. First operand 5092 states and 6835 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (18), 5 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 18:47:44,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:45,288 INFO L93 Difference]: Finished difference Result 9609 states and 13438 transitions. [2021-11-13 18:47:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:47:45,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (18), 5 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 160 [2021-11-13 18:47:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:45,327 INFO L225 Difference]: With dead ends: 9609 [2021-11-13 18:47:45,327 INFO L226 Difference]: Without dead ends: 5931 [2021-11-13 18:47:45,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:47:45,346 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 624 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5889.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.25ms SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6413.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:45,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 3209 Invalid, 2252 Unknown, 0 Unchecked, 23.25ms Time], IncrementalHoareTripleChecker [543 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 6413.76ms Time] [2021-11-13 18:47:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5931 states. [2021-11-13 18:47:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5931 to 5090. [2021-11-13 18:47:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5090 states, 3567 states have (on average 1.271937202130642) internal successors, (4537), 3650 states have internal predecessors, (4537), 1100 states have call successors, (1100), 389 states have call predecessors, (1100), 422 states have return successors, (1192), 1105 states have call predecessors, (1192), 1099 states have call successors, (1192) [2021-11-13 18:47:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 6829 transitions. [2021-11-13 18:47:45,835 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 6829 transitions. Word has length 160 [2021-11-13 18:47:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:45,836 INFO L470 AbstractCegarLoop]: Abstraction has 5090 states and 6829 transitions. [2021-11-13 18:47:45,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (18), 5 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 18:47:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 6829 transitions. [2021-11-13 18:47:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-13 18:47:45,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:45,852 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:45,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:47:45,852 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1513318799, now seen corresponding path program 1 times [2021-11-13 18:47:45,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:45,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242508262] [2021-11-13 18:47:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:45,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:47:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:47:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:47:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-13 18:47:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:47:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:47:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:47:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:47:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:47:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-13 18:47:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:47:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:47:46,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:46,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242508262] [2021-11-13 18:47:46,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242508262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:46,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:46,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:47:46,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078272832] [2021-11-13 18:47:46,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:46,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:47:46,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:47:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:47:46,399 INFO L87 Difference]: Start difference. First operand 5090 states and 6829 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 5 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 18:47:51,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:53,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:55,881 WARN L515 Checker$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 18:47:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:57,212 INFO L93 Difference]: Finished difference Result 11009 states and 15299 transitions. [2021-11-13 18:47:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:47:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 5 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 162 [2021-11-13 18:47:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:57,239 INFO L225 Difference]: With dead ends: 11009 [2021-11-13 18:47:57,240 INFO L226 Difference]: Without dead ends: 5971 [2021-11-13 18:47:57,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:47:57,261 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 345 mSDsluCounter, 2480 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 274 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9691.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.73ms SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10372.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:57,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 3498 Invalid, 2472 Unknown, 0 Unchecked, 27.73ms Time], IncrementalHoareTripleChecker [274 Valid, 2197 Invalid, 1 Unknown, 0 Unchecked, 10372.80ms Time] [2021-11-13 18:47:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-11-13 18:47:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5102. [2021-11-13 18:47:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5102 states, 3579 states have (on average 1.2710254260966751) internal successors, (4549), 3662 states have internal predecessors, (4549), 1100 states have call successors, (1100), 389 states have call predecessors, (1100), 422 states have return successors, (1192), 1105 states have call predecessors, (1192), 1099 states have call successors, (1192) [2021-11-13 18:47:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 6841 transitions. [2021-11-13 18:47:57,682 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 6841 transitions. Word has length 162 [2021-11-13 18:47:57,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:57,682 INFO L470 AbstractCegarLoop]: Abstraction has 5102 states and 6841 transitions. [2021-11-13 18:47:57,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (18), 5 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 18:47:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 6841 transitions. [2021-11-13 18:47:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:47:57,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:57,699 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:57,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:47:57,700 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1008301203, now seen corresponding path program 1 times [2021-11-13 18:47:57,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:57,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586192568] [2021-11-13 18:47:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:57,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:47:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:47:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:47:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:47:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:00,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:48:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:00,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:48:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:48:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:48:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:02,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-13 18:48:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-13 18:48:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:48:02,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:02,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586192568] [2021-11-13 18:48:02,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586192568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:02,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485025218] [2021-11-13 18:48:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:02,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:02,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:02,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:48:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-13 18:48:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 18:48:04,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 18:48:06,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485025218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:06,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:06,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14, 12] total 51 [2021-11-13 18:48:06,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306467439] [2021-11-13 18:48:06,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 18:48:06,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 18:48:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2422, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:48:06,581 INFO L87 Difference]: Start difference. First operand 5102 states and 6841 transitions. Second operand has 51 states, 45 states have (on average 4.955555555555556) internal successors, (223), 40 states have internal predecessors, (223), 14 states have call successors, (38), 5 states have call predecessors, (38), 12 states have return successors, (38), 16 states have call predecessors, (38), 14 states have call successors, (38) [2021-11-13 18:48:51,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:48:54,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:48:56,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:48:59,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:01,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:03,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:06,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:19,918 INFO L93 Difference]: Finished difference Result 13871 states and 19645 transitions. [2021-11-13 18:49:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-13 18:49:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 45 states have (on average 4.955555555555556) internal successors, (223), 40 states have internal predecessors, (223), 14 states have call successors, (38), 5 states have call predecessors, (38), 12 states have return successors, (38), 16 states have call predecessors, (38), 14 states have call successors, (38) Word has length 163 [2021-11-13 18:49:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:19,965 INFO L225 Difference]: With dead ends: 13871 [2021-11-13 18:49:19,966 INFO L226 Difference]: Without dead ends: 8798 [2021-11-13 18:49:19,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3958 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1042, Invalid=15214, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 18:49:19,996 INFO L933 BasicCegarLoop]: 1182 mSDtfsCounter, 2346 mSDsluCounter, 22917 mSDsCounter, 0 mSdLazyCounter, 35782 mSolverCounterSat, 1411 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58152.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2442 SdHoareTripleChecker+Valid, 24099 SdHoareTripleChecker+Invalid, 37197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 303.43ms SdHoareTripleChecker+Time, 1411 IncrementalHoareTripleChecker+Valid, 35782 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63311.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:19,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2442 Valid, 24099 Invalid, 37197 Unknown, 0 Unchecked, 303.43ms Time], IncrementalHoareTripleChecker [1411 Valid, 35782 Invalid, 4 Unknown, 0 Unchecked, 63311.91ms Time] [2021-11-13 18:49:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8798 states. [2021-11-13 18:49:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8798 to 5986. [2021-11-13 18:49:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5986 states, 4207 states have (on average 1.2669360589493701) internal successors, (5330), 4314 states have internal predecessors, (5330), 1267 states have call successors, (1267), 460 states have call predecessors, (1267), 511 states have return successors, (1475), 1270 states have call predecessors, (1475), 1266 states have call successors, (1475) [2021-11-13 18:49:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5986 states to 5986 states and 8072 transitions. [2021-11-13 18:49:20,667 INFO L78 Accepts]: Start accepts. Automaton has 5986 states and 8072 transitions. Word has length 163 [2021-11-13 18:49:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:20,668 INFO L470 AbstractCegarLoop]: Abstraction has 5986 states and 8072 transitions. [2021-11-13 18:49:20,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 45 states have (on average 4.955555555555556) internal successors, (223), 40 states have internal predecessors, (223), 14 states have call successors, (38), 5 states have call predecessors, (38), 12 states have return successors, (38), 16 states have call predecessors, (38), 14 states have call successors, (38) [2021-11-13 18:49:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5986 states and 8072 transitions. [2021-11-13 18:49:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 18:49:20,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:20,693 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:20,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:20,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:49:20,918 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash -749282785, now seen corresponding path program 1 times [2021-11-13 18:49:20,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:20,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957122662] [2021-11-13 18:49:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:20,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:49:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:49:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:49:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:49:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:49:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:49:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:49:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:49:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 18:49:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:49:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2021-11-13 18:49:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-11-13 18:49:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 18:49:21,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:21,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957122662] [2021-11-13 18:49:21,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957122662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:21,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:21,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:49:21,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735259130] [2021-11-13 18:49:21,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:21,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:49:21,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:21,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:49:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:21,635 INFO L87 Difference]: Start difference. First operand 5986 states and 8072 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 4 states have internal predecessors, (140), 3 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 18:49:27,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:29,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:31,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:32,982 INFO L93 Difference]: Finished difference Result 12016 states and 16681 transitions. [2021-11-13 18:49:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:49:32,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 4 states have internal predecessors, (140), 3 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 223 [2021-11-13 18:49:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:33,019 INFO L225 Difference]: With dead ends: 12016 [2021-11-13 18:49:33,019 INFO L226 Difference]: Without dead ends: 6863 [2021-11-13 18:49:33,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:49:33,036 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 907 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 820 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10138.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 3517 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.79ms SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10778.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:33,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 3517 Invalid, 2838 Unknown, 0 Unchecked, 26.79ms Time], IncrementalHoareTripleChecker [820 Valid, 2016 Invalid, 2 Unknown, 0 Unchecked, 10778.93ms Time] [2021-11-13 18:49:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6863 states. [2021-11-13 18:49:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6863 to 6000. [2021-11-13 18:49:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 4221 states have (on average 1.2660506988865199) internal successors, (5344), 4328 states have internal predecessors, (5344), 1267 states have call successors, (1267), 460 states have call predecessors, (1267), 511 states have return successors, (1475), 1270 states have call predecessors, (1475), 1266 states have call successors, (1475) [2021-11-13 18:49:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 8086 transitions. [2021-11-13 18:49:33,591 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 8086 transitions. Word has length 223 [2021-11-13 18:49:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:33,592 INFO L470 AbstractCegarLoop]: Abstraction has 6000 states and 8086 transitions. [2021-11-13 18:49:33,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 4 states have internal predecessors, (140), 3 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 18:49:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 8086 transitions. [2021-11-13 18:49:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 18:49:33,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:33,617 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:33,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:49:33,618 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -762141360, now seen corresponding path program 1 times [2021-11-13 18:49:33,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:33,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221167226] [2021-11-13 18:49:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:33,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:49:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:49:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-13 18:49:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:49:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:49:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:49:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:49:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:49:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:49:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-13 18:49:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 18:49:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:49:34,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:34,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221167226] [2021-11-13 18:49:34,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221167226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:34,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:34,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:49:34,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906604544] [2021-11-13 18:49:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:34,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:49:34,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:49:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:34,091 INFO L87 Difference]: Start difference. First operand 6000 states and 8086 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:49:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:40,614 INFO L93 Difference]: Finished difference Result 11924 states and 16504 transitions. [2021-11-13 18:49:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:49:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 186 [2021-11-13 18:49:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:40,651 INFO L225 Difference]: With dead ends: 11924 [2021-11-13 18:49:40,652 INFO L226 Difference]: Without dead ends: 6757 [2021-11-13 18:49:40,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:49:40,669 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1607 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5165.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.25ms SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5876.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:40,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1755 Valid, 3426 Invalid, 3193 Unknown, 0 Unchecked, 33.25ms Time], IncrementalHoareTripleChecker [985 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 5876.00ms Time] [2021-11-13 18:49:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6757 states. [2021-11-13 18:49:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6757 to 5955. [2021-11-13 18:49:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5955 states, 4188 states have (on average 1.252626552053486) internal successors, (5246), 4294 states have internal predecessors, (5246), 1260 states have call successors, (1260), 455 states have call predecessors, (1260), 506 states have return successors, (1468), 1264 states have call predecessors, (1468), 1259 states have call successors, (1468) [2021-11-13 18:49:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5955 states to 5955 states and 7974 transitions. [2021-11-13 18:49:41,333 INFO L78 Accepts]: Start accepts. Automaton has 5955 states and 7974 transitions. Word has length 186 [2021-11-13 18:49:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:41,334 INFO L470 AbstractCegarLoop]: Abstraction has 5955 states and 7974 transitions. [2021-11-13 18:49:41,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:49:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5955 states and 7974 transitions. [2021-11-13 18:49:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-13 18:49:41,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:41,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:41,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:49:41,357 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1385830112, now seen corresponding path program 1 times [2021-11-13 18:49:41,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:41,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678089916] [2021-11-13 18:49:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:41,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:49:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:49:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:49:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:49:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:49:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:49:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:49:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:49:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:49:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:42,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:49:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:42,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-13 18:49:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:49:42,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:42,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678089916] [2021-11-13 18:49:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678089916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:42,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:49:42,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109788839] [2021-11-13 18:49:42,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:42,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:49:42,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:49:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:42,030 INFO L87 Difference]: Start difference. First operand 5955 states and 7974 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (21), 7 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:49:48,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:50,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:52,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:53,828 INFO L93 Difference]: Finished difference Result 11858 states and 16341 transitions. [2021-11-13 18:49:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:49:53,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (21), 7 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 177 [2021-11-13 18:49:53,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:53,853 INFO L225 Difference]: With dead ends: 11858 [2021-11-13 18:49:53,853 INFO L226 Difference]: Without dead ends: 6720 [2021-11-13 18:49:53,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:49:53,866 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 407 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 309 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10571.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 3904 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.34ms SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11238.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:53,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 3904 Invalid, 2768 Unknown, 0 Unchecked, 28.34ms Time], IncrementalHoareTripleChecker [309 Valid, 2457 Invalid, 2 Unknown, 0 Unchecked, 11238.55ms Time] [2021-11-13 18:49:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2021-11-13 18:49:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 5963. [2021-11-13 18:49:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 4196 states have (on average 1.2521448999046711) internal successors, (5254), 4302 states have internal predecessors, (5254), 1260 states have call successors, (1260), 455 states have call predecessors, (1260), 506 states have return successors, (1468), 1264 states have call predecessors, (1468), 1259 states have call successors, (1468) [2021-11-13 18:49:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 7982 transitions. [2021-11-13 18:49:54,434 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 7982 transitions. Word has length 177 [2021-11-13 18:49:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:54,435 INFO L470 AbstractCegarLoop]: Abstraction has 5963 states and 7982 transitions. [2021-11-13 18:49:54,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (21), 7 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:49:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 7982 transitions. [2021-11-13 18:49:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-13 18:49:54,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:54,458 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:54,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:49:54,458 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1409743659, now seen corresponding path program 1 times [2021-11-13 18:49:54,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:54,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035472548] [2021-11-13 18:49:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:54,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:49:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:49:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:49:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:49:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:49:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:49:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:49:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:49:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:49:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:49:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 18:49:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:49:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:49:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-13 18:49:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-13 18:49:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-13 18:49:55,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:55,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035472548] [2021-11-13 18:49:55,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035472548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:55,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426873482] [2021-11-13 18:49:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:55,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:55,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:55,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:49:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:49:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-13 18:49:59,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-13 18:49:59,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426873482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:59,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:59,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2021-11-13 18:49:59,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63348901] [2021-11-13 18:49:59,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:59,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:49:59,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:49:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:49:59,884 INFO L87 Difference]: Start difference. First operand 5963 states and 7982 transitions. Second operand has 15 states, 15 states have (on average 10.8) internal successors, (162), 10 states have internal predecessors, (162), 2 states have call successors, (39), 7 states have call predecessors, (39), 5 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 18:50:04,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:06,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:08,211 INFO L93 Difference]: Finished difference Result 11906 states and 16417 transitions. [2021-11-13 18:50:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:50:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.8) internal successors, (162), 10 states have internal predecessors, (162), 2 states have call successors, (39), 7 states have call predecessors, (39), 5 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 226 [2021-11-13 18:50:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:08,243 INFO L225 Difference]: With dead ends: 11906 [2021-11-13 18:50:08,243 INFO L226 Difference]: Without dead ends: 6744 [2021-11-13 18:50:08,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 495 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:50:08,261 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 879 mSDsluCounter, 4131 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 806 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6921.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 5139 SdHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.73ms SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7574.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:08,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 5139 Invalid, 3607 Unknown, 0 Unchecked, 34.73ms Time], IncrementalHoareTripleChecker [806 Valid, 2800 Invalid, 1 Unknown, 0 Unchecked, 7574.38ms Time] [2021-11-13 18:50:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6744 states. [2021-11-13 18:50:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6744 to 5987. [2021-11-13 18:50:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5987 states, 4220 states have (on average 1.2507109004739336) internal successors, (5278), 4326 states have internal predecessors, (5278), 1260 states have call successors, (1260), 455 states have call predecessors, (1260), 506 states have return successors, (1468), 1264 states have call predecessors, (1468), 1259 states have call successors, (1468) [2021-11-13 18:50:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5987 states to 5987 states and 8006 transitions. [2021-11-13 18:50:08,835 INFO L78 Accepts]: Start accepts. Automaton has 5987 states and 8006 transitions. Word has length 226 [2021-11-13 18:50:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:08,838 INFO L470 AbstractCegarLoop]: Abstraction has 5987 states and 8006 transitions. [2021-11-13 18:50:08,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.8) internal successors, (162), 10 states have internal predecessors, (162), 2 states have call successors, (39), 7 states have call predecessors, (39), 5 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 18:50:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5987 states and 8006 transitions. [2021-11-13 18:50:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 18:50:08,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:08,859 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:08,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:50:09,082 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1063523890, now seen corresponding path program 1 times [2021-11-13 18:50:09,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:09,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716228724] [2021-11-13 18:50:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:50:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:50:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-13 18:50:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:50:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:50:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:50:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:50:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:50:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-11-13 18:50:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-13 18:50:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:50:09,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:09,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716228724] [2021-11-13 18:50:09,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716228724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:09,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:09,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:50:09,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167794850] [2021-11-13 18:50:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:09,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:50:09,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:50:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:50:09,552 INFO L87 Difference]: Start difference. First operand 5987 states and 8006 transitions. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:50:15,122 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:16,979 INFO L93 Difference]: Finished difference Result 15517 states and 21485 transitions. [2021-11-13 18:50:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:50:16,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 190 [2021-11-13 18:50:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:17,035 INFO L225 Difference]: With dead ends: 15517 [2021-11-13 18:50:17,035 INFO L226 Difference]: Without dead ends: 10363 [2021-11-13 18:50:17,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:50:17,059 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 2611 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 1488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5860.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2792 SdHoareTripleChecker+Valid, 3709 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.97ms SdHoareTripleChecker+Time, 1488 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6571.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:17,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2792 Valid, 3709 Invalid, 3673 Unknown, 0 Unchecked, 35.97ms Time], IncrementalHoareTripleChecker [1488 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 6571.70ms Time] [2021-11-13 18:50:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-11-13 18:50:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 8651. [2021-11-13 18:50:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8651 states, 6088 states have (on average 1.25) internal successors, (7610), 6237 states have internal predecessors, (7610), 1838 states have call successors, (1838), 652 states have call predecessors, (1838), 724 states have return successors, (2092), 1846 states have call predecessors, (2092), 1837 states have call successors, (2092) [2021-11-13 18:50:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11540 transitions. [2021-11-13 18:50:18,014 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11540 transitions. Word has length 190 [2021-11-13 18:50:18,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:18,015 INFO L470 AbstractCegarLoop]: Abstraction has 8651 states and 11540 transitions. [2021-11-13 18:50:18,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:50:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11540 transitions. [2021-11-13 18:50:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-13 18:50:18,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:18,038 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:18,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:50:18,039 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1168531488, now seen corresponding path program 1 times [2021-11-13 18:50:18,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:18,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108903824] [2021-11-13 18:50:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:18,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:50:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:50:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:50:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:50:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:50:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:50:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:50:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:50:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-13 18:50:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-13 18:50:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:50:18,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:18,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108903824] [2021-11-13 18:50:18,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108903824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:18,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400843950] [2021-11-13 18:50:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:18,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:18,938 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:18,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:50:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:50:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:50:21,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:50:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400843950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:22,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 21 [2021-11-13 18:50:22,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779020377] [2021-11-13 18:50:22,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:22,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:50:22,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:50:22,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:50:22,636 INFO L87 Difference]: Start difference. First operand 8651 states and 11540 transitions. Second operand has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 16 states have internal predecessors, (159), 2 states have call successors, (38), 7 states have call predecessors, (38), 5 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 18:50:31,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:32,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:34,684 INFO L93 Difference]: Finished difference Result 17749 states and 24448 transitions. [2021-11-13 18:50:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:50:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 16 states have internal predecessors, (159), 2 states have call successors, (38), 7 states have call predecessors, (38), 5 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 181 [2021-11-13 18:50:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:34,721 INFO L225 Difference]: With dead ends: 17749 [2021-11-13 18:50:34,721 INFO L226 Difference]: Without dead ends: 9883 [2021-11-13 18:50:34,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 387 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:50:34,747 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 891 mSDsluCounter, 6767 mSDsCounter, 0 mSdLazyCounter, 4429 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9829.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 7773 SdHoareTripleChecker+Invalid, 5249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.34ms SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 4429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10736.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:34,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 7773 Invalid, 5249 Unknown, 0 Unchecked, 48.34ms Time], IncrementalHoareTripleChecker [820 Valid, 4429 Invalid, 0 Unknown, 0 Unchecked, 10736.79ms Time] [2021-11-13 18:50:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9883 states. [2021-11-13 18:50:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9883 to 8723. [2021-11-13 18:50:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 6160 states have (on average 1.247077922077922) internal successors, (7682), 6309 states have internal predecessors, (7682), 1838 states have call successors, (1838), 652 states have call predecessors, (1838), 724 states have return successors, (2092), 1846 states have call predecessors, (2092), 1837 states have call successors, (2092) [2021-11-13 18:50:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 11612 transitions. [2021-11-13 18:50:35,527 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 11612 transitions. Word has length 181 [2021-11-13 18:50:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:35,528 INFO L470 AbstractCegarLoop]: Abstraction has 8723 states and 11612 transitions. [2021-11-13 18:50:35,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.571428571428571) internal successors, (159), 16 states have internal predecessors, (159), 2 states have call successors, (38), 7 states have call predecessors, (38), 5 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 18:50:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 11612 transitions. [2021-11-13 18:50:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:50:35,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:35,546 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:35,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:35,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:50:35,774 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash -587216006, now seen corresponding path program 1 times [2021-11-13 18:50:35,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:35,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251860553] [2021-11-13 18:50:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:35,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:50:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:50:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:50:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:50:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:50:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:50:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:50:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 18:50:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:50:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-13 18:50:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:50:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 18:50:36,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:36,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251860553] [2021-11-13 18:50:36,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251860553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:36,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:36,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:50:36,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373829434] [2021-11-13 18:50:36,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:36,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:50:36,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:50:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:50:36,191 INFO L87 Difference]: Start difference. First operand 8723 states and 11612 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (25), 6 states have call predecessors, (25), 2 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 18:50:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:40,942 INFO L93 Difference]: Finished difference Result 17896 states and 24503 transitions. [2021-11-13 18:50:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:50:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (25), 6 states have call predecessors, (25), 2 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 208 [2021-11-13 18:50:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:41,000 INFO L225 Difference]: With dead ends: 17896 [2021-11-13 18:50:41,000 INFO L226 Difference]: Without dead ends: 10006 [2021-11-13 18:50:41,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:50:41,030 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 758 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3418.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.49ms SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3860.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:41,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 3350 Invalid, 2259 Unknown, 0 Unchecked, 23.49ms Time], IncrementalHoareTripleChecker [592 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 3860.23ms Time] [2021-11-13 18:50:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2021-11-13 18:50:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 8759. [2021-11-13 18:50:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8759 states, 6187 states have (on average 1.2479392274123162) internal successors, (7721), 6336 states have internal predecessors, (7721), 1844 states have call successors, (1844), 655 states have call predecessors, (1844), 727 states have return successors, (2098), 1852 states have call predecessors, (2098), 1843 states have call successors, (2098) [2021-11-13 18:50:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8759 states to 8759 states and 11663 transitions. [2021-11-13 18:50:41,927 INFO L78 Accepts]: Start accepts. Automaton has 8759 states and 11663 transitions. Word has length 208 [2021-11-13 18:50:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:41,928 INFO L470 AbstractCegarLoop]: Abstraction has 8759 states and 11663 transitions. [2021-11-13 18:50:41,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (25), 6 states have call predecessors, (25), 2 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 18:50:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8759 states and 11663 transitions. [2021-11-13 18:50:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:50:41,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:41,940 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:41,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:50:41,941 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash -743196548, now seen corresponding path program 1 times [2021-11-13 18:50:41,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:41,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171299975] [2021-11-13 18:50:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:41,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:50:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:50:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:50:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:50:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:50:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:50:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:50:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 18:50:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:50:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-13 18:50:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:50:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 18:50:42,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171299975] [2021-11-13 18:50:42,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171299975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:42,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:42,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:50:42,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653984962] [2021-11-13 18:50:42,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:42,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:50:42,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:50:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:50:42,344 INFO L87 Difference]: Start difference. First operand 8759 states and 11663 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 18:50:48,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:50:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:50,242 INFO L93 Difference]: Finished difference Result 18750 states and 26415 transitions. [2021-11-13 18:50:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:50:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 208 [2021-11-13 18:50:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:50,280 INFO L225 Difference]: With dead ends: 18750 [2021-11-13 18:50:50,280 INFO L226 Difference]: Without dead ends: 10038 [2021-11-13 18:50:50,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:50:50,307 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 413 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6469.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.89ms SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7035.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:50,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 3498 Invalid, 2523 Unknown, 0 Unchecked, 24.89ms Time], IncrementalHoareTripleChecker [360 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 7035.30ms Time] [2021-11-13 18:50:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10038 states. [2021-11-13 18:50:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10038 to 8771. [2021-11-13 18:50:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8771 states, 6193 states have (on average 1.2473760697561764) internal successors, (7725), 6351 states have internal predecessors, (7725), 1841 states have call successors, (1841), 655 states have call predecessors, (1841), 736 states have return successors, (2140), 1849 states have call predecessors, (2140), 1840 states have call successors, (2140) [2021-11-13 18:50:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8771 states to 8771 states and 11706 transitions. [2021-11-13 18:50:51,075 INFO L78 Accepts]: Start accepts. Automaton has 8771 states and 11706 transitions. Word has length 208 [2021-11-13 18:50:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:51,075 INFO L470 AbstractCegarLoop]: Abstraction has 8771 states and 11706 transitions. [2021-11-13 18:50:51,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 18:50:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8771 states and 11706 transitions. [2021-11-13 18:50:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:50:51,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:51,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:51,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:50:51,091 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -539240044, now seen corresponding path program 1 times [2021-11-13 18:50:51,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:51,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347654653] [2021-11-13 18:50:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:51,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:50:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:50:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:50:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:50:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:50:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:50:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:51,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:50:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 18:50:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:50:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-13 18:50:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:50:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 18:50:52,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:52,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347654653] [2021-11-13 18:50:52,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347654653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:52,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42173900] [2021-11-13 18:50:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:52,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:52,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:52,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:52,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:50:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-13 18:50:53,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 18:50:55,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:50:55,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42173900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:55,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:55,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [18] total 32 [2021-11-13 18:50:55,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082835057] [2021-11-13 18:50:55,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:55,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:50:55,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:50:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:50:55,029 INFO L87 Difference]: Start difference. First operand 8771 states and 11706 transitions. Second operand has 20 states, 16 states have (on average 7.6875) internal successors, (123), 14 states have internal predecessors, (123), 6 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 18:50:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:56,413 INFO L93 Difference]: Finished difference Result 16745 states and 22335 transitions. [2021-11-13 18:50:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:50:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 7.6875) internal successors, (123), 14 states have internal predecessors, (123), 6 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) Word has length 208 [2021-11-13 18:50:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:56,456 INFO L225 Difference]: With dead ends: 16745 [2021-11-13 18:50:56,456 INFO L226 Difference]: Without dead ends: 8803 [2021-11-13 18:50:56,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=1652, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:50:56,485 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 19 mSDsluCounter, 18823 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19935 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 85.70ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:56,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 19935 Invalid, 387 Unknown, 0 Unchecked, 85.70ms Time], IncrementalHoareTripleChecker [12 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 339.38ms Time] [2021-11-13 18:50:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8803 states. [2021-11-13 18:50:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8803 to 8780. [2021-11-13 18:50:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8780 states, 6202 states have (on average 1.2470170912608836) internal successors, (7734), 6357 states have internal predecessors, (7734), 1841 states have call successors, (1841), 655 states have call predecessors, (1841), 736 states have return successors, (2140), 1852 states have call predecessors, (2140), 1840 states have call successors, (2140) [2021-11-13 18:50:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8780 states to 8780 states and 11715 transitions. [2021-11-13 18:50:57,344 INFO L78 Accepts]: Start accepts. Automaton has 8780 states and 11715 transitions. Word has length 208 [2021-11-13 18:50:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:57,345 INFO L470 AbstractCegarLoop]: Abstraction has 8780 states and 11715 transitions. [2021-11-13 18:50:57,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 7.6875) internal successors, (123), 14 states have internal predecessors, (123), 6 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-13 18:50:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8780 states and 11715 transitions. [2021-11-13 18:50:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 18:50:57,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:57,358 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:57,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 18:50:57,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:57,559 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -498245120, now seen corresponding path program 2 times [2021-11-13 18:50:57,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:57,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193163071] [2021-11-13 18:50:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:57,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:57,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:57,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:50:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:50:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:57,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:50:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:50:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:50:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:50:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:50:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:50:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 18:50:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:50:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:50:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 18:50:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:50:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-13 18:50:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:50:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:50:58,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:58,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193163071] [2021-11-13 18:50:58,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193163071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:58,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350321014] [2021-11-13 18:50:58,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:58,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:58,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:58,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:51:03,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:51:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:51:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:51:03,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:51:05,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350321014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:05,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:05,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 42 [2021-11-13 18:51:05,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158046820] [2021-11-13 18:51:05,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:05,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-13 18:51:05,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-13 18:51:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:51:05,011 INFO L87 Difference]: Start difference. First operand 8780 states and 11715 transitions. Second operand has 42 states, 42 states have (on average 4.285714285714286) internal successors, (180), 37 states have internal predecessors, (180), 2 states have call successors, (38), 7 states have call predecessors, (38), 5 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 18:51:14,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:51:16,376 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 18:51:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:18,151 INFO L93 Difference]: Finished difference Result 18055 states and 24977 transitions. [2021-11-13 18:51:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:51:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.285714285714286) internal successors, (180), 37 states have internal predecessors, (180), 2 states have call successors, (38), 7 states have call predecessors, (38), 5 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 187 [2021-11-13 18:51:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:18,193 INFO L225 Difference]: With dead ends: 18055 [2021-11-13 18:51:18,193 INFO L226 Difference]: Without dead ends: 10056 [2021-11-13 18:51:18,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:51:18,217 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 1239 mSDsluCounter, 10145 mSDsCounter, 0 mSdLazyCounter, 5814 mSolverCounterSat, 1182 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9821.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 11158 SdHoareTripleChecker+Invalid, 6997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.20ms SdHoareTripleChecker+Time, 1182 IncrementalHoareTripleChecker+Valid, 5814 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10793.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:18,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 11158 Invalid, 6997 Unknown, 0 Unchecked, 56.20ms Time], IncrementalHoareTripleChecker [1182 Valid, 5814 Invalid, 1 Unknown, 0 Unchecked, 10793.27ms Time] [2021-11-13 18:51:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2021-11-13 18:51:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 8852. [2021-11-13 18:51:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8852 states, 6274 states have (on average 1.24418233981511) internal successors, (7806), 6429 states have internal predecessors, (7806), 1841 states have call successors, (1841), 655 states have call predecessors, (1841), 736 states have return successors, (2140), 1852 states have call predecessors, (2140), 1840 states have call successors, (2140) [2021-11-13 18:51:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8852 states to 8852 states and 11787 transitions. [2021-11-13 18:51:19,012 INFO L78 Accepts]: Start accepts. Automaton has 8852 states and 11787 transitions. Word has length 187 [2021-11-13 18:51:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:19,013 INFO L470 AbstractCegarLoop]: Abstraction has 8852 states and 11787 transitions. [2021-11-13 18:51:19,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.285714285714286) internal successors, (180), 37 states have internal predecessors, (180), 2 states have call successors, (38), 7 states have call predecessors, (38), 5 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 18:51:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8852 states and 11787 transitions. [2021-11-13 18:51:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:51:19,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:19,022 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:19,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:19,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:19,226 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1383710344, now seen corresponding path program 2 times [2021-11-13 18:51:19,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:19,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995018165] [2021-11-13 18:51:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:19,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:51:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:51:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:51:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:51:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:51:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:51:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:51:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:51:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-13 18:51:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:51:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:51:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:51:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:51:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:51:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:51:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:51:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:51:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:51:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:51:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-13 18:51:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-13 18:51:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:51:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-11-13 18:51:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:20,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-13 18:51:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:20,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:51:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 18:51:20,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:20,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995018165] [2021-11-13 18:51:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995018165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:20,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969311228] [2021-11-13 18:51:20,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:51:20,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:20,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:20,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:51:21,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:51:21,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-13 18:51:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:51:22,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 18:51:22,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969311228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:22,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:22,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-13 18:51:22,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317277502] [2021-11-13 18:51:22,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:22,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:51:22,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:22,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:51:22,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:51:22,946 INFO L87 Difference]: Start difference. First operand 8852 states and 11787 transitions. Second operand has 23 states, 23 states have (on average 8.478260869565217) internal successors, (195), 15 states have internal predecessors, (195), 4 states have call successors, (44), 6 states have call predecessors, (44), 6 states have return successors, (38), 7 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-13 18:51:39,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:51:40,879 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:51:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:46,961 INFO L93 Difference]: Finished difference Result 30792 states and 42741 transitions. [2021-11-13 18:51:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-13 18:51:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.478260869565217) internal successors, (195), 15 states have internal predecessors, (195), 4 states have call successors, (44), 6 states have call predecessors, (44), 6 states have return successors, (38), 7 states have call predecessors, (38), 4 states have call successors, (38) Word has length 208 [2021-11-13 18:51:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:47,059 INFO L225 Difference]: With dead ends: 30792 [2021-11-13 18:51:47,059 INFO L226 Difference]: Without dead ends: 22745 [2021-11-13 18:51:47,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 458 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=2674, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:51:47,088 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 3282 mSDsluCounter, 18178 mSDsCounter, 0 mSdLazyCounter, 15807 mSolverCounterSat, 2480 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18782.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3535 SdHoareTripleChecker+Valid, 19695 SdHoareTripleChecker+Invalid, 18288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 160.51ms SdHoareTripleChecker+Time, 2480 IncrementalHoareTripleChecker+Valid, 15807 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21063.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:47,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3535 Valid, 19695 Invalid, 18288 Unknown, 0 Unchecked, 160.51ms Time], IncrementalHoareTripleChecker [2480 Valid, 15807 Invalid, 1 Unknown, 0 Unchecked, 21063.09ms Time] [2021-11-13 18:51:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22745 states. [2021-11-13 18:51:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22745 to 20125. [2021-11-13 18:51:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20125 states, 14278 states have (on average 1.2500350189102114) internal successors, (17848), 14673 states have internal predecessors, (17848), 4132 states have call successors, (4132), 1498 states have call predecessors, (4132), 1714 states have return successors, (5198), 4129 states have call predecessors, (5198), 4131 states have call successors, (5198) [2021-11-13 18:51:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 27178 transitions. [2021-11-13 18:51:48,841 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 27178 transitions. Word has length 208 [2021-11-13 18:51:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 20125 states and 27178 transitions. [2021-11-13 18:51:48,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.478260869565217) internal successors, (195), 15 states have internal predecessors, (195), 4 states have call successors, (44), 6 states have call predecessors, (44), 6 states have return successors, (38), 7 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-13 18:51:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 27178 transitions. [2021-11-13 18:51:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:51:48,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:48,875 INFO L514 BasicCegarLoop]: trace histogram [16, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:48,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:49,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:49,090 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1562831241, now seen corresponding path program 1 times [2021-11-13 18:51:49,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:49,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048544815] [2021-11-13 18:51:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:49,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:51:50,483 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:51:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:51:52,061 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:51:52,061 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:51:52,062 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:51:52,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 18:51:52,069 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:52,073 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:51:52,195 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,196 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,197 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,197 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,199 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,200 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,203 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,204 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,206 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,206 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,207 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,207 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,208 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,208 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:51:52,225 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:51:52,309 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:51:52,313 INFO L158 Benchmark]: Toolchain (without parser) took 337438.77ms. Allocated memory was 127.9MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 86.8MB in the beginning and 1.1GB in the end (delta: -964.1MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2021-11-13 18:51:52,313 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 88.1MB. Free memory was 45.3MB in the beginning and 45.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:51:52,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2845.98ms. Allocated memory is still 127.9MB. Free memory was 86.5MB in the beginning and 64.3MB in the end (delta: 22.2MB). Peak memory consumption was 63.9MB. Max. memory is 16.1GB. [2021-11-13 18:51:52,314 INFO L158 Benchmark]: Boogie Procedure Inliner took 284.24ms. Allocated memory is still 127.9MB. Free memory was 64.3MB in the beginning and 51.1MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 18:51:52,314 INFO L158 Benchmark]: Boogie Preprocessor took 325.88ms. Allocated memory was 127.9MB in the beginning and 182.5MB in the end (delta: 54.5MB). Free memory was 51.1MB in the beginning and 119.0MB in the end (delta: -67.9MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2021-11-13 18:51:52,315 INFO L158 Benchmark]: RCFGBuilder took 4140.32ms. Allocated memory is still 182.5MB. Free memory was 119.0MB in the beginning and 60.1MB in the end (delta: 58.9MB). Peak memory consumption was 62.4MB. Max. memory is 16.1GB. [2021-11-13 18:51:52,315 INFO L158 Benchmark]: TraceAbstraction took 329834.26ms. Allocated memory was 182.5MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 60.1MB in the beginning and 1.1GB in the end (delta: -990.9MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2021-11-13 18:51:52,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 88.1MB. Free memory was 45.3MB in the beginning and 45.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2845.98ms. Allocated memory is still 127.9MB. Free memory was 86.5MB in the beginning and 64.3MB in the end (delta: 22.2MB). Peak memory consumption was 63.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 284.24ms. Allocated memory is still 127.9MB. Free memory was 64.3MB in the beginning and 51.1MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 325.88ms. Allocated memory was 127.9MB in the beginning and 182.5MB in the end (delta: 54.5MB). Free memory was 51.1MB in the beginning and 119.0MB in the end (delta: -67.9MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * RCFGBuilder took 4140.32ms. Allocated memory is still 182.5MB. Free memory was 119.0MB in the beginning and 60.1MB in the end (delta: 58.9MB). Peak memory consumption was 62.4MB. Max. memory is 16.1GB. * TraceAbstraction took 329834.26ms. Allocated memory was 182.5MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 60.1MB in the beginning and 1.1GB in the end (delta: -990.9MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:51:52,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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 6985379bcc34be713545a774d70e5414e9690ba41356ad39bb00629a60c9ae14 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:51:55,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:51:55,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:51:55,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:51:55,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:51:55,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:51:55,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:51:55,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:51:55,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:51:55,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:51:55,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:51:55,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:51:55,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:51:55,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:51:55,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:51:55,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:51:55,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:51:55,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:51:55,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:51:55,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:51:55,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:51:55,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:51:55,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:51:55,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:51:55,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:51:55,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:51:55,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:51:55,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:51:55,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:51:55,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:51:55,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:51:55,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:51:55,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:51:55,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:51:55,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:51:55,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:51:55,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:51:55,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:51:55,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:51:55,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:51:55,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:51:55,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:51:55,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:51:55,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:51:55,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:51:55,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:51:55,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:51:55,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:51:55,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:51:55,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:51:55,556 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:51:55,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:51:55,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:51:55,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:51:55,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:51:55,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:51:55,559 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:51:55,560 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:51:55,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:51:55,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:51:55,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:51:55,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:51:55,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:51:55,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:51:55,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:51:55,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:51:55,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:51:55,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:51:55,563 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:51:55,563 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:51:55,563 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:51:55,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:51:55,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:51:55,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:51:55,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:51:55,565 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6985379bcc34be713545a774d70e5414e9690ba41356ad39bb00629a60c9ae14 [2021-11-13 18:51:56,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:51:56,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:51:56,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:51:56,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:51:56,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:51:56,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2021-11-13 18:51:56,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/8e7c65331/aa1d57da4e7d4d619d69d114db7b0ca7/FLAGacbe10b6e [2021-11-13 18:51:57,275 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:51:57,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2021-11-13 18:51:57,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/8e7c65331/aa1d57da4e7d4d619d69d114db7b0ca7/FLAGacbe10b6e [2021-11-13 18:51:57,677 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/data/8e7c65331/aa1d57da4e7d4d619d69d114db7b0ca7 [2021-11-13 18:51:57,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:51:57,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:51:57,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:51:57,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:51:57,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:51:57,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:51:57" (1/1) ... [2021-11-13 18:51:57,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4358f373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:51:57, skipping insertion in model container [2021-11-13 18:51:57,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:51:57" (1/1) ... [2021-11-13 18:51:57,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:51:57,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:51:59,015 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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i[160997,161010] [2021-11-13 18:51:59,670 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 18:51:59,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:51:59,720 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:51:59,964 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_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i[160997,161010] [2021-11-13 18:52:00,254 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-13 18:52:00,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:52:00,375 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:52:00,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00 WrapperNode [2021-11-13 18:52:00,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:52:00,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:52:00,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:52:00,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:52:00,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:52:00,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:52:00,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:52:00,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:52:00,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:52:00,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:52:00,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:52:00,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:52:00,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (1/1) ... [2021-11-13 18:52:00,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:52:00,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:00,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:52:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:52:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure broadcast_write [2021-11-13 18:52:01,052 INFO L138 BoogieDeclarations]: Found implementation of procedure broadcast_write [2021-11-13 18:52:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-13 18:52:01,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-13 18:52:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure genphy_config_aneg [2021-11-13 18:52:01,053 INFO L138 BoogieDeclarations]: Found implementation of procedure genphy_config_aneg [2021-11-13 18:52:01,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:52:01,054 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-13 18:52:01,054 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-13 18:52:01,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:52:01,054 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_clock_put [2021-11-13 18:52:01,054 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_clock_put [2021-11-13 18:52:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:52:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:52:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:52:01,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:52:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2021-11-13 18:52:01,056 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2021-11-13 18:52:01,056 INFO L130 BoogieDeclarations]: Found specification of procedure phy2txts [2021-11-13 18:52:01,056 INFO L138 BoogieDeclarations]: Found implementation of procedure phy2txts [2021-11-13 18:52:01,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-13 18:52:01,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-13 18:52:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_ts_info [2021-11-13 18:52:01,057 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_ts_info [2021-11-13 18:52:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:52:01,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:52:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_destroy [2021-11-13 18:52:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_destroy [2021-11-13 18:52:01,058 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_write [2021-11-13 18:52:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_write [2021-11-13 18:52:01,058 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_config_intr [2021-11-13 18:52:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_config_intr [2021-11-13 18:52:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure tdr_write [2021-11-13 18:52:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure tdr_write [2021-11-13 18:52:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-13 18:52:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-13 18:52:01,060 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:52:01,060 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:52:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure exts_chan_to_edata [2021-11-13 18:52:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure exts_chan_to_edata [2021-11-13 18:52:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure skb_complete_tx_timestamp [2021-11-13 18:52:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_complete_tx_timestamp [2021-11-13 18:52:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-13 18:52:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-13 18:52:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-13 18:52:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-13 18:52:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:52:01,063 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:52:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:52:01,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:52:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_rxtstamp [2021-11-13 18:52:01,064 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_rxtstamp [2021-11-13 18:52:01,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:52:01,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:52:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure phy_read [2021-11-13 18:52:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_read [2021-11-13 18:52:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:52:01,067 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:52:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:52:01,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:52:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:52:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure prune_rx_ts [2021-11-13 18:52:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure prune_rx_ts [2021-11-13 18:52:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:52:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:52:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-13 18:52:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-13 18:52:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_config_init [2021-11-13 18:52:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_config_init [2021-11-13 18:52:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:52:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:52:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 18:52:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 18:52:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 18:52:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure ns_to_ktime [2021-11-13 18:52:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_to_ktime [2021-11-13 18:52:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-13 18:52:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-13 18:52:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:52:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-13 18:52:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-13 18:52:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-13 18:52:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-13 18:52:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-13 18:52:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 18:52:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 18:52:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:52:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:52:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure enable_status_frames [2021-11-13 18:52:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_status_frames [2021-11-13 18:52:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_hwtstamp [2021-11-13 18:52:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_hwtstamp [2021-11-13 18:52:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-13 18:52:01,077 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-13 18:52:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure phy_write [2021-11-13 18:52:01,078 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_write [2021-11-13 18:52:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-13 18:52:01,078 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-13 18:52:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:52:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:52:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:52:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:52:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:52:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:52:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-11-13 18:52:01,080 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-11-13 18:52:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:52:01,080 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:52:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:52:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:52:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:52:01,081 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_clock_get [2021-11-13 18:52:01,081 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_clock_get [2021-11-13 18:52:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:52:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_ack_interrupt [2021-11-13 18:52:01,083 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_ack_interrupt [2021-11-13 18:52:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure ext_read [2021-11-13 18:52:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ext_read [2021-11-13 18:52:01,087 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-13 18:52:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-13 18:52:01,089 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:52:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:52:01,091 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:52:01,092 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:52:01,093 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:52:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:52:01,098 INFO L130 BoogieDeclarations]: Found specification of procedure skb_mac_header [2021-11-13 18:52:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_mac_header [2021-11-13 18:52:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure dp83640_txtstamp [2021-11-13 18:52:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure dp83640_txtstamp [2021-11-13 18:52:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure enable_broadcast [2021-11-13 18:52:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_broadcast [2021-11-13 18:52:01,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:52:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:52:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:52:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:52:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:52:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:52:01,100 INFO L130 BoogieDeclarations]: Found specification of procedure ns_to_timespec [2021-11-13 18:52:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_to_timespec [2021-11-13 18:52:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure ext_write [2021-11-13 18:52:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ext_write [2021-11-13 18:52:01,101 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-13 18:52:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-13 18:52:02,698 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:52:13,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:52:13,185 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:52:13,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:13 BoogieIcfgContainer [2021-11-13 18:52:13,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:52:13,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:52:13,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:52:13,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:52:13,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:51:57" (1/3) ... [2021-11-13 18:52:13,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662680cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:52:13, skipping insertion in model container [2021-11-13 18:52:13,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:00" (2/3) ... [2021-11-13 18:52:13,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662680cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:52:13, skipping insertion in model container [2021-11-13 18:52:13,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:13" (3/3) ... [2021-11-13 18:52:13,199 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2021-11-13 18:52:13,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:52:13,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:52:13,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:52:13,278 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:52:13,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:52:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 826 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 588 states have internal predecessors, (750), 193 states have call successors, (193), 61 states have call predecessors, (193), 60 states have return successors, (190), 189 states have call predecessors, (190), 190 states have call successors, (190) [2021-11-13 18:52:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:52:13,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:13,339 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] [2021-11-13 18:52:13,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1130854638, now seen corresponding path program 1 times [2021-11-13 18:52:13,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:13,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843826502] [2021-11-13 18:52:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:13,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:13,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:13,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:13,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:52:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:14,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:52:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:14,361 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 18:52:14,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:14,556 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 18:52:14,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:14,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843826502] [2021-11-13 18:52:14,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843826502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:14,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:14,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 18:52:14,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613788237] [2021-11-13 18:52:14,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:14,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:52:14,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:52:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:52:14,607 INFO L87 Difference]: Start difference. First operand has 826 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 588 states have internal predecessors, (750), 193 states have call successors, (193), 61 states have call predecessors, (193), 60 states have return successors, (190), 189 states have call predecessors, (190), 190 states have call successors, (190) Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 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 18:52:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:15,244 INFO L93 Difference]: Finished difference Result 2460 states and 3431 transitions. [2021-11-13 18:52:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:52:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 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 32 [2021-11-13 18:52:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:15,288 INFO L225 Difference]: With dead ends: 2460 [2021-11-13 18:52:15,288 INFO L226 Difference]: Without dead ends: 1593 [2021-11-13 18:52:15,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:52:15,312 INFO L933 BasicCegarLoop]: 1305 mSDtfsCounter, 1118 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.59ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:15,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 6332 Invalid, 56 Unknown, 0 Unchecked, 49.59ms Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 258.83ms Time] [2021-11-13 18:52:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-11-13 18:52:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1589. [2021-11-13 18:52:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1101 states have (on average 1.2970027247956404) internal successors, (1428), 1125 states have internal predecessors, (1428), 370 states have call successors, (370), 118 states have call predecessors, (370), 117 states have return successors, (377), 367 states have call predecessors, (377), 369 states have call successors, (377) [2021-11-13 18:52:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2175 transitions. [2021-11-13 18:52:15,551 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2175 transitions. Word has length 32 [2021-11-13 18:52:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:15,552 INFO L470 AbstractCegarLoop]: Abstraction has 1589 states and 2175 transitions. [2021-11-13 18:52:15,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 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 18:52:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2175 transitions. [2021-11-13 18:52:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:52:15,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:15,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:15,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:15,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:15,793 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1456852114, now seen corresponding path program 1 times [2021-11-13 18:52:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:15,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076566596] [2021-11-13 18:52:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:15,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:15,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:15,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:52:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:52:16,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:52:16,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:52:17,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:17,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076566596] [2021-11-13 18:52:17,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076566596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:17,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:17,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:52:17,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113900885] [2021-11-13 18:52:17,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:52:17,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:52:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:52:17,084 INFO L87 Difference]: Start difference. First operand 1589 states and 2175 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:52:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:17,494 INFO L93 Difference]: Finished difference Result 3266 states and 4457 transitions. [2021-11-13 18:52:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:52:17,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 77 [2021-11-13 18:52:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:17,512 INFO L225 Difference]: With dead ends: 3266 [2021-11-13 18:52:17,512 INFO L226 Difference]: Without dead ends: 1685 [2021-11-13 18:52:17,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:52:17,522 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 96 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 256.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:17,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 2198 Invalid, 62 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 256.07ms Time] [2021-11-13 18:52:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-11-13 18:52:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1676. [2021-11-13 18:52:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1168 states have (on average 1.2953767123287672) internal successors, (1513), 1193 states have internal predecessors, (1513), 381 states have call successors, (381), 127 states have call predecessors, (381), 126 states have return successors, (388), 377 states have call predecessors, (388), 380 states have call successors, (388) [2021-11-13 18:52:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2282 transitions. [2021-11-13 18:52:17,640 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2282 transitions. Word has length 77 [2021-11-13 18:52:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:17,641 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 2282 transitions. [2021-11-13 18:52:17,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:52:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2282 transitions. [2021-11-13 18:52:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:52:17,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:17,650 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:17,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:17,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:17,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1040348853, now seen corresponding path program 1 times [2021-11-13 18:52:17,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:17,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751403752] [2021-11-13 18:52:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:17,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:17,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:17,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:52:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:52:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:52:19,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:52:19,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:19,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751403752] [2021-11-13 18:52:19,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751403752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:19,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:19,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:52:19,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749529342] [2021-11-13 18:52:19,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:19,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:52:19,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:52:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:52:19,437 INFO L87 Difference]: Start difference. First operand 1676 states and 2282 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:52:21,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:52:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:21,961 INFO L93 Difference]: Finished difference Result 4550 states and 6174 transitions. [2021-11-13 18:52:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:52:21,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 101 [2021-11-13 18:52:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:21,984 INFO L225 Difference]: With dead ends: 4550 [2021-11-13 18:52:21,984 INFO L226 Difference]: Without dead ends: 2903 [2021-11-13 18:52:21,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:52:21,995 INFO L933 BasicCegarLoop]: 1343 mSDtfsCounter, 980 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2256.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.64ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2326.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:21,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2210 Invalid, 100 Unknown, 0 Unchecked, 11.64ms Time], IncrementalHoareTripleChecker [37 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 2326.77ms Time] [2021-11-13 18:52:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-11-13 18:52:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2894. [2021-11-13 18:52:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2032 states have (on average 1.2844488188976377) internal successors, (2610), 2068 states have internal predecessors, (2610), 628 states have call successors, (628), 234 states have call predecessors, (628), 233 states have return successors, (638), 621 states have call predecessors, (638), 627 states have call successors, (638) [2021-11-13 18:52:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3876 transitions. [2021-11-13 18:52:22,179 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3876 transitions. Word has length 101 [2021-11-13 18:52:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:22,182 INFO L470 AbstractCegarLoop]: Abstraction has 2894 states and 3876 transitions. [2021-11-13 18:52:22,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:52:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3876 transitions. [2021-11-13 18:52:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:52:22,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:22,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:22,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:22,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:22,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2025083819, now seen corresponding path program 1 times [2021-11-13 18:52:22,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:22,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925384068] [2021-11-13 18:52:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:22,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:22,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:22,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:52:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:23,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:52:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:52:23,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:52:23,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:23,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925384068] [2021-11-13 18:52:23,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925384068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:23,889 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:23,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:52:23,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874315816] [2021-11-13 18:52:23,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:23,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:52:23,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:52:23,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:52:23,892 INFO L87 Difference]: Start difference. First operand 2894 states and 3876 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:52:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:24,179 INFO L93 Difference]: Finished difference Result 5795 states and 7774 transitions. [2021-11-13 18:52:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:52:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 101 [2021-11-13 18:52:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:24,212 INFO L225 Difference]: With dead ends: 5795 [2021-11-13 18:52:24,212 INFO L226 Difference]: Without dead ends: 2930 [2021-11-13 18:52:24,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:52:24,230 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 7 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.37ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:24,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 3334 Invalid, 14 Unknown, 0 Unchecked, 11.37ms Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 54.09ms Time] [2021-11-13 18:52:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-11-13 18:52:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2906. [2021-11-13 18:52:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2906 states, 2042 states have (on average 1.2830558276199804) internal successors, (2620), 2080 states have internal predecessors, (2620), 628 states have call successors, (628), 234 states have call predecessors, (628), 235 states have return successors, (640), 621 states have call predecessors, (640), 627 states have call successors, (640) [2021-11-13 18:52:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 3888 transitions. [2021-11-13 18:52:24,419 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 3888 transitions. Word has length 101 [2021-11-13 18:52:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:24,421 INFO L470 AbstractCegarLoop]: Abstraction has 2906 states and 3888 transitions. [2021-11-13 18:52:24,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:52:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 3888 transitions. [2021-11-13 18:52:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 18:52:24,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:24,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:24,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:24,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1300096473, now seen corresponding path program 1 times [2021-11-13 18:52:24,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:24,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126263420] [2021-11-13 18:52:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:24,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:24,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:24,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:52:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:52:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:52:25,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:52:26,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126263420] [2021-11-13 18:52:26,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126263420] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:26,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:26,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:52:26,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448915108] [2021-11-13 18:52:26,088 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:26,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:52:26,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:26,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:52:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:52:26,097 INFO L87 Difference]: Start difference. First operand 2906 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:52:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:26,233 INFO L93 Difference]: Finished difference Result 4399 states and 5896 transitions. [2021-11-13 18:52:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:52:26,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 102 [2021-11-13 18:52:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:26,267 INFO L225 Difference]: With dead ends: 4399 [2021-11-13 18:52:26,267 INFO L226 Difference]: Without dead ends: 2914 [2021-11-13 18:52:26,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:52:26,279 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 5 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:26,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2210 Invalid, 4 Unknown, 0 Unchecked, 7.05ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 14.36ms Time] [2021-11-13 18:52:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-11-13 18:52:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2914. [2021-11-13 18:52:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2048 states have (on average 1.2822265625) internal successors, (2626), 2088 states have internal predecessors, (2626), 628 states have call successors, (628), 234 states have call predecessors, (628), 237 states have return successors, (642), 621 states have call predecessors, (642), 627 states have call successors, (642) [2021-11-13 18:52:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 3896 transitions. [2021-11-13 18:52:26,460 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 3896 transitions. Word has length 102 [2021-11-13 18:52:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 2914 states and 3896 transitions. [2021-11-13 18:52:26,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 18:52:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 3896 transitions. [2021-11-13 18:52:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:52:26,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:26,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:26,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:26,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:26,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash -426238010, now seen corresponding path program 1 times [2021-11-13 18:52:26,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:26,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149473266] [2021-11-13 18:52:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:26,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:26,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:26,694 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:26,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:52:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:27,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:52:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:52:28,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:52:29,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:29,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149473266] [2021-11-13 18:52:29,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149473266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:29,190 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:29,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-13 18:52:29,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571120804] [2021-11-13 18:52:29,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:29,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:52:29,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:52:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:52:29,193 INFO L87 Difference]: Start difference. First operand 2914 states and 3896 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 6 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-13 18:52:31,283 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:52:33,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:52:35,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:52:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:54,514 INFO L93 Difference]: Finished difference Result 7922 states and 10652 transitions. [2021-11-13 18:52:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:52:54,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 6 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 104 [2021-11-13 18:52:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:54,554 INFO L225 Difference]: With dead ends: 7922 [2021-11-13 18:52:54,554 INFO L226 Difference]: Without dead ends: 5037 [2021-11-13 18:52:54,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:52:54,568 INFO L933 BasicCegarLoop]: 1221 mSDtfsCounter, 5795 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 4852 mSolverCounterSat, 2934 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22356.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6039 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 7789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 81.17ms SdHoareTripleChecker+Time, 2934 IncrementalHoareTripleChecker+Valid, 4852 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24576.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:54,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6039 Valid, 3151 Invalid, 7789 Unknown, 0 Unchecked, 81.17ms Time], IncrementalHoareTripleChecker [2934 Valid, 4852 Invalid, 3 Unknown, 0 Unchecked, 24576.27ms Time] [2021-11-13 18:52:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2021-11-13 18:52:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 4962. [2021-11-13 18:52:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4962 states, 3489 states have (on average 1.2780166236744053) internal successors, (4459), 3562 states have internal predecessors, (4459), 1072 states have call successors, (1072), 393 states have call predecessors, (1072), 400 states have return successors, (1124), 1059 states have call predecessors, (1124), 1071 states have call successors, (1124) [2021-11-13 18:52:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4962 states to 4962 states and 6655 transitions. [2021-11-13 18:52:54,948 INFO L78 Accepts]: Start accepts. Automaton has 4962 states and 6655 transitions. Word has length 104 [2021-11-13 18:52:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:54,949 INFO L470 AbstractCegarLoop]: Abstraction has 4962 states and 6655 transitions. [2021-11-13 18:52:54,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 6 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-13 18:52:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4962 states and 6655 transitions. [2021-11-13 18:52:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:52:54,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:54,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:54,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:55,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:55,177 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 445866508, now seen corresponding path program 1 times [2021-11-13 18:52:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:55,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504792468] [2021-11-13 18:52:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:55,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:55,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:55,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:52:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:55,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:52:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:52:56,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:52:56,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:52:56,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504792468] [2021-11-13 18:52:56,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504792468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:56,983 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:56,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:52:56,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707351637] [2021-11-13 18:52:56,984 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:56,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:52:56,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:52:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:52:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:52:56,985 INFO L87 Difference]: Start difference. First operand 4962 states and 6655 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:52:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:57,295 INFO L93 Difference]: Finished difference Result 9945 states and 13419 transitions. [2021-11-13 18:52:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:52:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-11-13 18:52:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:57,342 INFO L225 Difference]: With dead ends: 9945 [2021-11-13 18:52:57,342 INFO L226 Difference]: Without dead ends: 5012 [2021-11-13 18:52:57,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:52:57,368 INFO L933 BasicCegarLoop]: 1108 mSDtfsCounter, 2 mSDsluCounter, 3319 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:57,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4427 Invalid, 12 Unknown, 0 Unchecked, 59.06ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 30.81ms Time] [2021-11-13 18:52:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-11-13 18:52:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4998. [2021-11-13 18:52:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4998 states, 3515 states have (on average 1.2759601706970127) internal successors, (4485), 3590 states have internal predecessors, (4485), 1072 states have call successors, (1072), 393 states have call predecessors, (1072), 410 states have return successors, (1140), 1067 states have call predecessors, (1140), 1071 states have call successors, (1140) [2021-11-13 18:52:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4998 states to 4998 states and 6697 transitions. [2021-11-13 18:52:57,690 INFO L78 Accepts]: Start accepts. Automaton has 4998 states and 6697 transitions. Word has length 130 [2021-11-13 18:52:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:57,691 INFO L470 AbstractCegarLoop]: Abstraction has 4998 states and 6697 transitions. [2021-11-13 18:52:57,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:52:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4998 states and 6697 transitions. [2021-11-13 18:52:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 18:52:57,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:57,702 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-13 18:52:57,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:57,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:52:57,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash -655827426, now seen corresponding path program 1 times [2021-11-13 18:52:57,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:52:57,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151062209] [2021-11-13 18:52:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:57,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:52:57,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:52:57,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:52:57,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:52:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 18:52:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:53:01,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:53:06,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:53:06,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151062209] [2021-11-13 18:53:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151062209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:06,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:06,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19, 14] imperfect sequences [] total 30 [2021-11-13 18:53:06,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817803014] [2021-11-13 18:53:06,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 18:53:06,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:53:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 18:53:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:53:06,844 INFO L87 Difference]: Start difference. First operand 4998 states and 6697 transitions. Second operand has 30 states, 26 states have (on average 5.346153846153846) internal successors, (139), 22 states have internal predecessors, (139), 7 states have call successors, (23), 2 states have call predecessors, (23), 9 states have return successors, (24), 12 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-13 18:53:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:10,078 INFO L93 Difference]: Finished difference Result 11403 states and 15565 transitions. [2021-11-13 18:53:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:53:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 5.346153846153846) internal successors, (139), 22 states have internal predecessors, (139), 7 states have call successors, (23), 2 states have call predecessors, (23), 9 states have return successors, (24), 12 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-11-13 18:53:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:10,141 INFO L225 Difference]: With dead ends: 11403 [2021-11-13 18:53:10,141 INFO L226 Difference]: Without dead ends: 6434 [2021-11-13 18:53:10,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:53:10,169 INFO L933 BasicCegarLoop]: 1188 mSDtfsCounter, 260 mSDsluCounter, 23657 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1477.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 24845 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.33ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1659.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:10,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 24845 Invalid, 496 Unknown, 0 Unchecked, 46.33ms Time], IncrementalHoareTripleChecker [69 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 1659.08ms Time] [2021-11-13 18:53:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6434 states. [2021-11-13 18:53:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6434 to 5046. [2021-11-13 18:53:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5046 states, 3557 states have (on average 1.2704526286196234) internal successors, (4519), 3626 states have internal predecessors, (4519), 1072 states have call successors, (1072), 393 states have call predecessors, (1072), 416 states have return successors, (1156), 1079 states have call predecessors, (1156), 1071 states have call successors, (1156) [2021-11-13 18:53:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5046 states to 5046 states and 6747 transitions. [2021-11-13 18:53:10,594 INFO L78 Accepts]: Start accepts. Automaton has 5046 states and 6747 transitions. Word has length 151 [2021-11-13 18:53:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:10,595 INFO L470 AbstractCegarLoop]: Abstraction has 5046 states and 6747 transitions. [2021-11-13 18:53:10,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 5.346153846153846) internal successors, (139), 22 states have internal predecessors, (139), 7 states have call successors, (23), 2 states have call predecessors, (23), 9 states have return successors, (24), 12 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-13 18:53:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5046 states and 6747 transitions. [2021-11-13 18:53:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:53:10,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:10,608 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-13 18:53:10,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:10,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:53:10,822 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1040659477, now seen corresponding path program 1 times [2021-11-13 18:53:10,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:53:10,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834692238] [2021-11-13 18:53:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:10,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:53:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:53:10,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:53:10,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:53:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:53:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:53:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:53:12,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:53:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834692238] [2021-11-13 18:53:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834692238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:12,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:12,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:53:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275516993] [2021-11-13 18:53:12,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:12,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:53:12,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:53:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:53:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:53:12,346 INFO L87 Difference]: Start difference. First operand 5046 states and 6747 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 18:53:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:12,619 INFO L93 Difference]: Finished difference Result 10111 states and 13556 transitions. [2021-11-13 18:53:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:53:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 165 [2021-11-13 18:53:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:12,654 INFO L225 Difference]: With dead ends: 10111 [2021-11-13 18:53:12,654 INFO L226 Difference]: Without dead ends: 5062 [2021-11-13 18:53:12,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:12,676 INFO L933 BasicCegarLoop]: 1108 mSDtfsCounter, 6 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3323 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:12,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3323 Invalid, 12 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 40.58ms Time] [2021-11-13 18:53:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2021-11-13 18:53:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 5062. [2021-11-13 18:53:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 3573 states have (on average 1.269241533725161) internal successors, (4535), 3642 states have internal predecessors, (4535), 1072 states have call successors, (1072), 393 states have call predecessors, (1072), 416 states have return successors, (1156), 1079 states have call predecessors, (1156), 1071 states have call successors, (1156) [2021-11-13 18:53:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 6763 transitions. [2021-11-13 18:53:13,004 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 6763 transitions. Word has length 165 [2021-11-13 18:53:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:13,004 INFO L470 AbstractCegarLoop]: Abstraction has 5062 states and 6763 transitions. [2021-11-13 18:53:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 18:53:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 6763 transitions. [2021-11-13 18:53:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-13 18:53:13,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:13,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:13,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:13,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:53:13,229 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1631275893, now seen corresponding path program 1 times [2021-11-13 18:53:13,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:53:13,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771878211] [2021-11-13 18:53:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:13,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:53:13,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:53:13,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:53:13,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:53:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:53:14,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:53:14,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:53:15,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:53:15,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771878211] [2021-11-13 18:53:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771878211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:15,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:53:15,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:53:15,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196882431] [2021-11-13 18:53:15,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:15,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:53:15,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:53:15,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:53:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:53:15,134 INFO L87 Difference]: Start difference. First operand 5062 states and 6763 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 18:53:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:15,758 INFO L93 Difference]: Finished difference Result 10159 states and 13620 transitions. [2021-11-13 18:53:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:53:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 167 [2021-11-13 18:53:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:15,785 INFO L225 Difference]: With dead ends: 10159 [2021-11-13 18:53:15,786 INFO L226 Difference]: Without dead ends: 5094 [2021-11-13 18:53:15,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:53:15,805 INFO L933 BasicCegarLoop]: 1108 mSDtfsCounter, 17 mSDsluCounter, 3324 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4432 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.27ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:15,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 4432 Invalid, 40 Unknown, 0 Unchecked, 7.27ms Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 135.70ms Time] [2021-11-13 18:53:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2021-11-13 18:53:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 5094. [2021-11-13 18:53:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 3605 states have (on average 1.2668515950069348) internal successors, (4567), 3674 states have internal predecessors, (4567), 1072 states have call successors, (1072), 393 states have call predecessors, (1072), 416 states have return successors, (1156), 1079 states have call predecessors, (1156), 1071 states have call successors, (1156) [2021-11-13 18:53:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 6795 transitions. [2021-11-13 18:53:16,103 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 6795 transitions. Word has length 167 [2021-11-13 18:53:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:16,104 INFO L470 AbstractCegarLoop]: Abstraction has 5094 states and 6795 transitions. [2021-11-13 18:53:16,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 18:53:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 6795 transitions. [2021-11-13 18:53:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-13 18:53:16,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:16,158 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 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] [2021-11-13 18:53:16,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:16,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:53:16,381 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -979399221, now seen corresponding path program 2 times [2021-11-13 18:53:16,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:53:16,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622258868] [2021-11-13 18:53:16,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:53:16,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:53:16,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:53:16,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:53:16,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:53:25,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:53:25,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:53:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 18:53:25,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:53:26,361 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:53:26,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622258868] [2021-11-13 18:53:26,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622258868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:26,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:26,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:53:26,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469581354] [2021-11-13 18:53:26,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:26,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:53:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:53:26,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:53:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:53:26,363 INFO L87 Difference]: Start difference. First operand 5094 states and 6795 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 4 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-13 18:53:28,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:53:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:28,862 INFO L93 Difference]: Finished difference Result 10144 states and 13533 transitions. [2021-11-13 18:53:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:53:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 4 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 171 [2021-11-13 18:53:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:28,889 INFO L225 Difference]: With dead ends: 10144 [2021-11-13 18:53:28,889 INFO L226 Difference]: Without dead ends: 5053 [2021-11-13 18:53:28,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:53:28,903 INFO L933 BasicCegarLoop]: 1159 mSDtfsCounter, 1063 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2172.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2219.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:28,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 1231 Invalid, 67 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [30 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2219.95ms Time] [2021-11-13 18:53:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-11-13 18:53:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 5040. [2021-11-13 18:53:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 3555 states have (on average 1.259915611814346) internal successors, (4479), 3624 states have internal predecessors, (4479), 1068 states have call successors, (1068), 393 states have call predecessors, (1068), 416 states have return successors, (1148), 1075 states have call predecessors, (1148), 1067 states have call successors, (1148) [2021-11-13 18:53:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 6695 transitions. [2021-11-13 18:53:29,204 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 6695 transitions. Word has length 171 [2021-11-13 18:53:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:29,205 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 6695 transitions. [2021-11-13 18:53:29,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 4 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-13 18:53:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 6695 transitions. [2021-11-13 18:53:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-13 18:53:29,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:29,221 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:29,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:29,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:53:29,422 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1591933480, now seen corresponding path program 1 times [2021-11-13 18:53:29,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:53:29,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998913703] [2021-11-13 18:53:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:29,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:53:29,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:53:29,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:53:29,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:53:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:53:30,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:53:31,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:53:32,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:53:32,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998913703] [2021-11-13 18:53:32,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998913703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:32,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:53:32,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-13 18:53:32,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512776027] [2021-11-13 18:53:32,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:32,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:53:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:53:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:53:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:53:32,421 INFO L87 Difference]: Start difference. First operand 5040 states and 6695 transitions. Second operand has 18 states, 18 states have (on average 8.166666666666666) internal successors, (147), 18 states have internal predecessors, (147), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 18:53:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:34,543 INFO L93 Difference]: Finished difference Result 10124 states and 13516 transitions. [2021-11-13 18:53:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:53:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.166666666666666) internal successors, (147), 18 states have internal predecessors, (147), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 179 [2021-11-13 18:53:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:34,568 INFO L225 Difference]: With dead ends: 10124 [2021-11-13 18:53:34,568 INFO L226 Difference]: Without dead ends: 5104 [2021-11-13 18:53:34,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:53:34,583 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 49 mSDsluCounter, 11050 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 410.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 12156 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.24ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 468.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:34,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 12156 Invalid, 134 Unknown, 0 Unchecked, 16.24ms Time], IncrementalHoareTripleChecker [34 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 468.23ms Time] [2021-11-13 18:53:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-11-13 18:53:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 5104. [2021-11-13 18:53:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 3619 states have (on average 1.2553191489361701) internal successors, (4543), 3688 states have internal predecessors, (4543), 1068 states have call successors, (1068), 393 states have call predecessors, (1068), 416 states have return successors, (1148), 1075 states have call predecessors, (1148), 1067 states have call successors, (1148) [2021-11-13 18:53:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 6759 transitions. [2021-11-13 18:53:34,928 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 6759 transitions. Word has length 179 [2021-11-13 18:53:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:34,929 INFO L470 AbstractCegarLoop]: Abstraction has 5104 states and 6759 transitions. [2021-11-13 18:53:34,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.166666666666666) internal successors, (147), 18 states have internal predecessors, (147), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 18:53:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 6759 transitions. [2021-11-13 18:53:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:53:34,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:34,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:34,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:53:35,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash -587216006, now seen corresponding path program 1 times [2021-11-13 18:53:35,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:53:35,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509903766] [2021-11-13 18:53:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:35,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:53:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:53:35,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:53:35,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:53:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:53:36,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-13 18:53:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 18:53:36,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 18:53:37,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:53:37,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509903766] [2021-11-13 18:53:37,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509903766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:37,600 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:37,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-13 18:53:37,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056650938] [2021-11-13 18:53:37,600 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:37,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:53:37,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:53:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:53:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:53:37,602 INFO L87 Difference]: Start difference. First operand 5104 states and 6759 transitions. Second operand has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-13 18:53:39,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:53:46,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:53:48,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:53:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:49,531 INFO L93 Difference]: Finished difference Result 12627 states and 16922 transitions. [2021-11-13 18:53:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:53:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 208 [2021-11-13 18:53:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:49,567 INFO L225 Difference]: With dead ends: 12627 [2021-11-13 18:53:49,568 INFO L226 Difference]: Without dead ends: 7575 [2021-11-13 18:53:49,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:49,584 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 946 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 179 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10873.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 4552 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.76ms SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11482.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:49,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 4552 Invalid, 639 Unknown, 0 Unchecked, 13.76ms Time], IncrementalHoareTripleChecker [179 Valid, 457 Invalid, 3 Unknown, 0 Unchecked, 11482.25ms Time] [2021-11-13 18:53:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2021-11-13 18:53:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 7326. [2021-11-13 18:53:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7326 states, 5215 states have (on average 1.277660594439118) internal successors, (6663), 5338 states have internal predecessors, (6663), 1500 states have call successors, (1500), 587 states have call predecessors, (1500), 610 states have return successors, (1760), 1459 states have call predecessors, (1760), 1499 states have call successors, (1760) [2021-11-13 18:53:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7326 states to 7326 states and 9923 transitions. [2021-11-13 18:53:50,060 INFO L78 Accepts]: Start accepts. Automaton has 7326 states and 9923 transitions. Word has length 208 [2021-11-13 18:53:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 7326 states and 9923 transitions. [2021-11-13 18:53:50,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 2 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-13 18:53:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7326 states and 9923 transitions. [2021-11-13 18:53:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 18:53:50,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:50,080 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:50,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:50,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:53:50,307 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1555847256, now seen corresponding path program 2 times [2021-11-13 18:53:50,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:53:50,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13080966] [2021-11-13 18:53:50,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:53:50,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:53:50,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:53:50,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:53:50,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:54:00,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:54:00,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:00,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:54:00,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-13 18:54:01,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-13 18:54:04,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:54:04,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13080966] [2021-11-13 18:54:04,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13080966] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:04,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:54:04,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-13 18:54:04,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589935685] [2021-11-13 18:54:04,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:04,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:54:04,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:54:04,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:54:04,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:54:04,451 INFO L87 Difference]: Start difference. First operand 7326 states and 9923 transitions. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-13 18:54:06,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:08,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:25,738 INFO L93 Difference]: Finished difference Result 19430 states and 27025 transitions. [2021-11-13 18:54:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:54:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 187 [2021-11-13 18:54:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:25,814 INFO L225 Difference]: With dead ends: 19430 [2021-11-13 18:54:25,814 INFO L226 Difference]: Without dead ends: 14264 [2021-11-13 18:54:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:54:25,836 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 5087 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 3748 mSolverCounterSat, 2494 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17668.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5217 SdHoareTripleChecker+Valid, 3303 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.10ms SdHoareTripleChecker+Time, 2494 IncrementalHoareTripleChecker+Valid, 3748 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19753.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:25,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5217 Valid, 3303 Invalid, 6244 Unknown, 0 Unchecked, 50.10ms Time], IncrementalHoareTripleChecker [2494 Valid, 3748 Invalid, 2 Unknown, 0 Unchecked, 19753.74ms Time] [2021-11-13 18:54:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14264 states. [2021-11-13 18:54:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14264 to 11950. [2021-11-13 18:54:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11950 states, 8485 states have (on average 1.279787860931055) internal successors, (10859), 8702 states have internal predecessors, (10859), 2456 states have call successors, (2456), 945 states have call predecessors, (2456), 1008 states have return successors, (2963), 2397 states have call predecessors, (2963), 2455 states have call successors, (2963) [2021-11-13 18:54:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11950 states to 11950 states and 16278 transitions. [2021-11-13 18:54:26,916 INFO L78 Accepts]: Start accepts. Automaton has 11950 states and 16278 transitions. Word has length 187 [2021-11-13 18:54:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:26,917 INFO L470 AbstractCegarLoop]: Abstraction has 11950 states and 16278 transitions. [2021-11-13 18:54:26,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 6 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-13 18:54:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11950 states and 16278 transitions. [2021-11-13 18:54:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-13 18:54:26,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:26,936 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:26,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:27,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:54:27,138 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash 461751305, now seen corresponding path program 1 times [2021-11-13 18:54:27,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:54:27,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698324292] [2021-11-13 18:54:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:27,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:54:27,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:54:27,142 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:54:27,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:54:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:54:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 18:54:28,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-13 18:54:28,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:54:28,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698324292] [2021-11-13 18:54:28,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698324292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:28,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:28,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:54:28,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568039834] [2021-11-13 18:54:28,868 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:54:28,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:54:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:54:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:54:28,869 INFO L87 Difference]: Start difference. First operand 11950 states and 16278 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-13 18:54:30,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:54:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:32,189 INFO L93 Difference]: Finished difference Result 23820 states and 32455 transitions. [2021-11-13 18:54:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:54:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 198 [2021-11-13 18:54:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:32,241 INFO L225 Difference]: With dead ends: 23820 [2021-11-13 18:54:32,241 INFO L226 Difference]: Without dead ends: 11922 [2021-11-13 18:54:32,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:54:32,274 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 1457 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2523.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.78ms SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2665.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:32,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 2788 Invalid, 390 Unknown, 0 Unchecked, 6.78ms Time], IncrementalHoareTripleChecker [324 Valid, 65 Invalid, 1 Unknown, 0 Unchecked, 2665.34ms Time] [2021-11-13 18:54:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11922 states. [2021-11-13 18:54:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11922 to 11899. [2021-11-13 18:54:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11899 states, 8444 states have (on average 1.2569872098531503) internal successors, (10614), 8661 states have internal predecessors, (10614), 2450 states have call successors, (2450), 941 states have call predecessors, (2450), 1004 states have return successors, (2957), 2391 states have call predecessors, (2957), 2449 states have call successors, (2957) [2021-11-13 18:54:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11899 states to 11899 states and 16021 transitions. [2021-11-13 18:54:33,140 INFO L78 Accepts]: Start accepts. Automaton has 11899 states and 16021 transitions. Word has length 198 [2021-11-13 18:54:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:33,141 INFO L470 AbstractCegarLoop]: Abstraction has 11899 states and 16021 transitions. [2021-11-13 18:54:33,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-13 18:54:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11899 states and 16021 transitions. [2021-11-13 18:54:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-13 18:54:33,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:33,159 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:33,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-13 18:54:33,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:54:33,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash -461416121, now seen corresponding path program 1 times [2021-11-13 18:54:33,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:54:33,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911551380] [2021-11-13 18:54:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:33,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:54:33,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:54:33,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:54:33,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:54:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:54:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 18:54:34,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-13 18:54:34,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:54:34,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911551380] [2021-11-13 18:54:34,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911551380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:34,964 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:34,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:54:34,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477593381] [2021-11-13 18:54:34,964 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:34,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:54:34,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:54:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:54:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:54:34,965 INFO L87 Difference]: Start difference. First operand 11899 states and 16021 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-13 18:54:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:36,118 INFO L93 Difference]: Finished difference Result 28918 states and 38977 transitions. [2021-11-13 18:54:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:54:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 198 [2021-11-13 18:54:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:36,191 INFO L225 Difference]: With dead ends: 28918 [2021-11-13 18:54:36,191 INFO L226 Difference]: Without dead ends: 17071 [2021-11-13 18:54:36,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:54:36,223 INFO L933 BasicCegarLoop]: 1358 mSDtfsCounter, 1347 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 3652 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.89ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 231.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:36,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 3652 Invalid, 100 Unknown, 0 Unchecked, 6.89ms Time], IncrementalHoareTripleChecker [60 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 231.95ms Time] [2021-11-13 18:54:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2021-11-13 18:54:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 16130. [2021-11-13 18:54:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16130 states, 11417 states have (on average 1.2531312954366296) internal successors, (14307), 11700 states have internal predecessors, (14307), 3366 states have call successors, (3366), 1258 states have call predecessors, (3366), 1346 states have return successors, (3942), 3306 states have call predecessors, (3942), 3365 states have call successors, (3942) [2021-11-13 18:54:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16130 states to 16130 states and 21615 transitions. [2021-11-13 18:54:37,362 INFO L78 Accepts]: Start accepts. Automaton has 16130 states and 21615 transitions. Word has length 198 [2021-11-13 18:54:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:37,363 INFO L470 AbstractCegarLoop]: Abstraction has 16130 states and 21615 transitions. [2021-11-13 18:54:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-13 18:54:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 16130 states and 21615 transitions. [2021-11-13 18:54:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 18:54:37,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:37,383 INFO L514 BasicCegarLoop]: trace histogram [14, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:37,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:37,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:54:37,610 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1434847170, now seen corresponding path program 1 times [2021-11-13 18:54:37,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:54:37,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172316975] [2021-11-13 18:54:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:37,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:54:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:54:37,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:54:37,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:54:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:38,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:54:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:54:39,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:54:42,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:54:42,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172316975] [2021-11-13 18:54:42,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172316975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:42,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:54:42,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-13 18:54:42,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287528754] [2021-11-13 18:54:42,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:42,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:54:42,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:54:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:54:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:54:42,174 INFO L87 Difference]: Start difference. First operand 16130 states and 21615 transitions. Second operand has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 states have internal predecessors, (180), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 18:54:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:44,408 INFO L93 Difference]: Finished difference Result 32316 states and 43458 transitions. [2021-11-13 18:54:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:54:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 states have internal predecessors, (180), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 215 [2021-11-13 18:54:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:44,474 INFO L225 Difference]: With dead ends: 32316 [2021-11-13 18:54:44,474 INFO L226 Difference]: Without dead ends: 16166 [2021-11-13 18:54:44,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:54:44,524 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 31 mSDsluCounter, 17682 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 921.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18788 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.82ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1074.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:44,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 18788 Invalid, 334 Unknown, 0 Unchecked, 21.82ms Time], IncrementalHoareTripleChecker [42 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1074.11ms Time] [2021-11-13 18:54:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16166 states. [2021-11-13 18:54:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16166 to 16166. [2021-11-13 18:54:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16166 states, 11453 states have (on average 1.2523356325853487) internal successors, (14343), 11736 states have internal predecessors, (14343), 3366 states have call successors, (3366), 1258 states have call predecessors, (3366), 1346 states have return successors, (3942), 3306 states have call predecessors, (3942), 3365 states have call successors, (3942) [2021-11-13 18:54:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16166 states to 16166 states and 21651 transitions. [2021-11-13 18:54:45,652 INFO L78 Accepts]: Start accepts. Automaton has 16166 states and 21651 transitions. Word has length 215 [2021-11-13 18:54:45,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 16166 states and 21651 transitions. [2021-11-13 18:54:45,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.294117647058823) internal successors, (180), 34 states have internal predecessors, (180), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 18:54:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 16166 states and 21651 transitions. [2021-11-13 18:54:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-13 18:54:45,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:45,670 INFO L514 BasicCegarLoop]: trace histogram [16, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:45,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-13 18:54:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:54:45,894 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:45,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:45,894 INFO L85 PathProgramCache]: Analyzing trace with hash 409167417, now seen corresponding path program 1 times [2021-11-13 18:54:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:54:45,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775500644] [2021-11-13 18:54:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:45,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:54:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:54:45,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:54:45,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:54:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:54:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-13 18:54:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-13 18:54:47,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:54:47,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775500644] [2021-11-13 18:54:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775500644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:47,494 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:54:47,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:54:47,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735023303] [2021-11-13 18:54:47,495 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:47,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:54:47,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:54:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:54:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:54:47,496 INFO L87 Difference]: Start difference. First operand 16166 states and 21651 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 18:54:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:48,545 INFO L93 Difference]: Finished difference Result 29585 states and 39771 transitions. [2021-11-13 18:54:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:54:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 191 [2021-11-13 18:54:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:48,600 INFO L225 Difference]: With dead ends: 29585 [2021-11-13 18:54:48,600 INFO L226 Difference]: Without dead ends: 16322 [2021-11-13 18:54:48,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:54:48,638 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 33 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4404 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:48,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 4404 Invalid, 47 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 112.28ms Time] [2021-11-13 18:54:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16322 states. [2021-11-13 18:54:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16322 to 16243. [2021-11-13 18:54:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16243 states, 11528 states have (on average 1.253469812630118) internal successors, (14450), 11813 states have internal predecessors, (14450), 3366 states have call successors, (3366), 1258 states have call predecessors, (3366), 1348 states have return successors, (3948), 3306 states have call predecessors, (3948), 3365 states have call successors, (3948) [2021-11-13 18:54:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16243 states to 16243 states and 21764 transitions. [2021-11-13 18:54:49,963 INFO L78 Accepts]: Start accepts. Automaton has 16243 states and 21764 transitions. Word has length 191 [2021-11-13 18:54:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:49,965 INFO L470 AbstractCegarLoop]: Abstraction has 16243 states and 21764 transitions. [2021-11-13 18:54:49,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 18:54:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16243 states and 21764 transitions. [2021-11-13 18:54:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:54:49,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:49,975 INFO L514 BasicCegarLoop]: trace histogram [16, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:49,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:50,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:54:50,176 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1562831241, now seen corresponding path program 1 times [2021-11-13 18:54:50,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:54:50,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185297664] [2021-11-13 18:54:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:50,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:54:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:54:50,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:54:50,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:55:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:55:10,117 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:55:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:55:38,060 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:55:38,060 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:55:38,061 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:55:38,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:38,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:55:38,266 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:38,269 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:55:38,382 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,383 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,383 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,384 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,385 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,386 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,388 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,389 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,390 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,391 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,391 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,391 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,392 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,392 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled [2021-11-13 18:55:38,404 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:55:38,498 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:55:38,502 INFO L158 Benchmark]: Toolchain (without parser) took 220816.34ms. Allocated memory was 58.7MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 38.3MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 671.6MB. Max. memory is 16.1GB. [2021-11-13 18:55:38,503 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 58.7MB. Free memory was 39.1MB in the beginning and 39.1MB in the end (delta: 11.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:55:38,503 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2688.75ms. Allocated memory was 58.7MB in the beginning and 113.2MB in the end (delta: 54.5MB). Free memory was 38.0MB in the beginning and 61.5MB in the end (delta: -23.5MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. [2021-11-13 18:55:38,503 INFO L158 Benchmark]: Boogie Procedure Inliner took 232.64ms. Allocated memory is still 113.2MB. Free memory was 61.5MB in the beginning and 49.5MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 18:55:38,504 INFO L158 Benchmark]: Boogie Preprocessor took 329.51ms. Allocated memory is still 113.2MB. Free memory was 49.5MB in the beginning and 52.9MB in the end (delta: -3.4MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2021-11-13 18:55:38,504 INFO L158 Benchmark]: RCFGBuilder took 12246.59ms. Allocated memory was 113.2MB in the beginning and 260.0MB in the end (delta: 146.8MB). Free memory was 52.9MB in the beginning and 159.3MB in the end (delta: -106.4MB). Peak memory consumption was 70.9MB. Max. memory is 16.1GB. [2021-11-13 18:55:38,508 INFO L158 Benchmark]: TraceAbstraction took 205309.27ms. Allocated memory was 260.0MB in the beginning and 2.5GB in the end (delta: 2.2GB). Free memory was 159.3MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 591.0MB. Max. memory is 16.1GB. [2021-11-13 18:55:38,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 58.7MB. Free memory was 39.1MB in the beginning and 39.1MB in the end (delta: 11.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2688.75ms. Allocated memory was 58.7MB in the beginning and 113.2MB in the end (delta: 54.5MB). Free memory was 38.0MB in the beginning and 61.5MB in the end (delta: -23.5MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 232.64ms. Allocated memory is still 113.2MB. Free memory was 61.5MB in the beginning and 49.5MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 329.51ms. Allocated memory is still 113.2MB. Free memory was 49.5MB in the beginning and 52.9MB in the end (delta: -3.4MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * RCFGBuilder took 12246.59ms. Allocated memory was 113.2MB in the beginning and 260.0MB in the end (delta: 146.8MB). Free memory was 52.9MB in the beginning and 159.3MB in the end (delta: -106.4MB). Peak memory consumption was 70.9MB. Max. memory is 16.1GB. * TraceAbstraction took 205309.27ms. Allocated memory was 260.0MB in the beginning and 2.5GB in the end (delta: 2.2GB). Free memory was 159.3MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 591.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:55:38,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_823274e4-b1f5-4d07-b50c-f3a7e1295ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null